.ag-book__lesson-lab {
    margin-top: 32px;
    font-family: Inter, Arial, sans-serif;
    color: #071331;
}

.ag-book .ag-book__chapter-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 154px;
    gap: 30px;
    align-items: center;
}

.ag-book .ag-book__chapter-copy {
    min-width: 0;
}

.ag-book .ag-book__chapter-cover {
    position: relative;
    display: block;
    width: 100%;
    max-width: 154px;
    justify-self: end;
    overflow: hidden;
    border: 1px solid rgba(15, 74, 242, .22);
    border-radius: 4px;
    background: #fff;
    box-shadow: 0 16px 34px rgba(7, 19, 49, .18);
    text-decoration: none;
    transform: translateZ(0);
    transition: transform .2s ease, box-shadow .2s ease;
}

.ag-book .ag-book__chapter-cover::after {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, .65);
    content: "";
    pointer-events: none;
}

.ag-book .ag-book__chapter-cover:hover {
    box-shadow: 0 20px 42px rgba(7, 19, 49, .24);
    transform: translateY(-3px);
}

.ag-book .ag-book__chapter-cover img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1000 / 1499;
    object-fit: cover;
}

.ag-book .ag-book__chapter-cover-badge {
    position: absolute;
    right: 8px;
    bottom: 8px;
    padding: 5px 7px;
    border-radius: 4px;
    background: rgba(7, 19, 49, .92);
    color: #fff;
    font-size: 8px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.ag-lesson-simulator {
    container-type: inline-size;
    container-name: ag-simulator;
    overflow: hidden;
    border: 1px solid #cfdcf4;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 20px 50px rgba(7, 19, 49, .08);
}

.ag-lesson-simulator *,
.ag-lesson-simulator *::before,
.ag-lesson-simulator *::after {
    box-sizing: border-box;
}

.ag-lesson-simulator__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 26px 28px 22px;
    border-bottom: 1px solid #d9e3f5;
    background: linear-gradient(110deg, #071331 0%, #102861 72%, #0f4af2 100%);
    color: #fff;
}

.ag-lesson-simulator__head > div { min-width: 0; }

.ag-lesson-simulator__index {
    display: block;
    margin-bottom: 8px;
    color: #9fbcff;
    font-size: 11px;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.ag-lesson-simulator__head h4 {
    margin: 0 0 8px;
    color: #fff;
    font-size: clamp(22px, 3vw, 31px);
    font-weight: 750;
    line-height: 1.12;
    letter-spacing: 0;
}

.ag-lesson-simulator__head p {
    max-width: 780px;
    margin: 0;
    color: #d9e5ff;
    font-size: 15px;
    font-weight: 450;
    line-height: 1.6;
}

.ag-lesson-simulator__engine {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    cursor: default;
    pointer-events: none;
    white-space: nowrap;
}

.ag-lesson-simulator__engine::before {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #3de1b6;
    box-shadow: 0 0 0 5px rgba(61,225,182,.16);
    content: "";
}

.ag-lesson-simulator__body {
    display: grid;
    grid-template-columns: minmax(230px, 31%) minmax(0, 1fr);
    min-height: 430px;
}

.ag-lesson-simulator__controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 24px;
    border-right: 1px solid #d9e3f5;
    background: #f5f8fe;
}

.ag-lesson-simulator__visual {
    position: relative;
    min-width: 0;
    min-height: 430px;
    padding: 24px;
    background-color: #fff;
    background-image: linear-gradient(#eef3fb 1px, transparent 1px), linear-gradient(90deg, #eef3fb 1px, transparent 1px);
    background-size: 28px 28px;
}

.ag-lab-field {
    display: grid;
    gap: 8px;
    margin: 0;
}

.ag-lab-field > span {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: #233657;
    font-size: 12px;
    font-weight: 750;
    line-height: 1.35;
}

.ag-lab-field output {
    color: #0f4af2;
    font-variant-numeric: tabular-nums;
    font-weight: 800;
}

.ag-lab-field select {
    width: 100%;
    min-height: 44px;
    padding: 0 38px 0 12px;
    border: 1px solid #bfcff0;
    border-radius: 6px;
    background: #fff;
    color: #071331;
    font: 600 14px/1.2 Inter, Arial, sans-serif;
}

.ag-lab-field input[type="range"] {
    width: 100%;
    height: 24px;
    margin: 0;
    accent-color: #0f4af2;
    cursor: pointer;
}

.ag-lab-button {
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid #bfcff0;
    border-radius: 6px;
    background: #fff;
    color: #0f4af2;
    font: 700 14px/1.2 Inter, Arial, sans-serif;
    cursor: pointer;
}

.ag-lab-button:hover,
.ag-lab-button:focus-visible { border-color: #0f4af2; outline: none; }

.ag-lab-button.is-primary {
    border-color: #0f4af2;
    background: #0f4af2;
    color: #fff;
}

.ag-lab-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.ag-lab-actions .ag-lab-button { flex: 1 1 110px; }

.ag-lab-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 2px;
}

.ag-lab-metric {
    min-width: 0;
    min-height: 76px;
    padding: 11px;
    border: 1px solid #cedaf0;
    border-radius: 6px;
    background: #fff;
}

.ag-lab-metric span {
    display: block;
    margin-bottom: 7px;
    color: #63718c;
    font-size: 10px;
    font-weight: 750;
    line-height: 1.25;
    text-transform: uppercase;
}

.ag-lab-metric strong {
    display: block;
    overflow-wrap: anywhere;
    color: #071331;
    font-size: 16px;
    font-weight: 800;
    line-height: 1.25;
    font-variant-numeric: tabular-nums;
}

.ag-lab-canvas,
.ag-lab-svg {
    display: block;
    width: 100%;
    min-width: 0;
    height: 350px;
    border: 1px solid #d6e0f2;
    border-radius: 6px;
    background: #fff;
}

.ag-lab-svg { padding: 8px; }

.ag-lesson-simulator__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 24px;
    border-top: 1px solid #d9e3f5;
    background: #fff;
}

.ag-lesson-simulator__footer > span {
    color: #42516d;
    font-size: 13px;
    line-height: 1.55;
}

.ag-lesson-simulator__footer a {
    flex: 0 0 auto;
    color: #0f4af2;
    font-size: 13px;
    font-weight: 750;
    text-decoration: none;
}

.ag-lesson-simulator__footer a:hover { text-decoration: underline; }

.ag-backprop-flow,
/* Lesson 11: a guided Transformer forward pass with one computation per step. */
.agf-dlbook-lab-11 .ag-lesson-simulator__body {
    grid-template-columns: minmax(250px, 28%) minmax(0, 1fr);
}

.agf-dlbook-lab-11 .ag-transformer-studio--guided {
    gap: 14px;
}

.ag-transformer-advanced {
    overflow: hidden;
    border: 1px solid #cad8ef;
    border-radius: 6px;
    background: #fff;
}

.ag-transformer-advanced summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px;
    color: #172744;
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
    list-style: none;
}

.ag-transformer-advanced summary::-webkit-details-marker { display: none; }
.ag-transformer-advanced summary::after { content: "+"; color: #0f4af2; font-size: 18px; line-height: 1; }
.ag-transformer-advanced[open] summary::after { content: "−"; }
.ag-transformer-advanced summary span { color: #71809a; font-size: 8px; font-weight: 700; text-transform: uppercase; }
.ag-transformer-advanced > div { display: grid; gap: 13px; padding: 0 12px 14px; border-top: 1px solid #e1e8f5; }
.ag-transformer-advanced > div > :first-child { margin-top: 13px; }

.ag-transformer-guide {
    overflow: hidden;
    border: 1px solid #cfdbef;
    border-radius: 7px;
    background: #fff;
}

.ag-transformer-guide > header {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 3px 14px;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid #dce5f4;
    background: #f7f9fe;
}

.ag-transformer-guide > header > span {
    grid-row: 1 / 3;
    display: block;
    min-width: 74px;
    min-height: 0;
    padding: 3px 0 3px 10px;
    border-left: 3px solid #0f4af2;
    border-radius: 0;
    background: transparent;
    color: #0f4af2;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.35;
    cursor: default;
}

.ag-transformer-guide > header strong { color: #071331; font-size: 17px; line-height: 1.25; }
.ag-transformer-guide > header p { margin: 0; color: #52617b; font-size: 10px; line-height: 1.5; }

.ag-transformer-guide .ag-transformer-pipeline {
    display: grid;
    grid-template-columns: repeat(9, minmax(72px, 1fr));
    gap: 0;
    padding: 0;
    overflow-x: auto;
}

.ag-transformer-guide .ag-transformer-pipeline button {
    display: grid;
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 6px;
    align-items: center;
    min-width: 92px;
    min-height: 52px;
    padding: 8px;
    border: 0;
    border-right: 1px solid #dce5f4;
    border-radius: 0;
    text-align: left;
    box-shadow: none;
}

.ag-transformer-guide .ag-transformer-pipeline button:last-child { border-right: 0; }
.ag-transformer-guide .ag-transformer-pipeline button > span {
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #eaf0ff;
    color: #0f4af2;
    font-size: 8px;
}

.ag-transformer-guide .ag-transformer-pipeline button.is-selected > span { background: #fff; color: #0f4af2; }

.agf-dlbook-lab-11 .ag-transformer-workspace {
    grid-template-columns: minmax(0, 1fr) 220px;
}

.agf-dlbook-lab-11 .ag-transformer-stage > div {
    min-height: 360px;
}

.ag-transformer-qkv-concept {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.ag-transformer-qkv-concept > section,
.ag-transformer-attention-step > section {
    min-width: 0;
    padding: 12px;
    border: 1px solid #d8e2f2;
    border-radius: 6px;
    background: #f8faff;
}

.ag-transformer-qkv-concept > section > span,
.ag-transformer-attention-step header strong { display: block; color: #071331; font-size: 11px; font-weight: 850; }
.ag-transformer-qkv-concept > section > small,
.ag-transformer-attention-step header span { display: block; margin: 4px 0 11px; color: #63718c; font-size: 8px; line-height: 1.4; }

.ag-transformer-attention-step {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(240px, .8fr);
    gap: 12px;
}

.ag-transformer-attention-step .ag-transformer-attention-grid { padding: 4px 0 0; }
.ag-transformer-attention-step .ag-transformer-flow { padding: 0; }

.ag-transformer-step-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding-top: 2px;
}

.ag-transformer-step-actions button {
    min-width: 150px;
    min-height: 44px;
    padding: 10px 16px;
    border: 1px solid #bfcfec;
    border-radius: 5px;
    background: #fff;
    color: #0f4af2;
    font: 800 11px/1.2 Inter, Arial, sans-serif;
    cursor: pointer;
}

.ag-transformer-step-actions button.is-primary { margin-left: auto; border-color: #0f4af2; background: #0f4af2; color: #fff; }
.ag-transformer-step-actions button:disabled { opacity: .38; cursor: not-allowed; }

@media (max-width: 920px) {
    .agf-dlbook-lab-11 .ag-lesson-simulator__body { grid-template-columns: minmax(0, 1fr); }
    .agf-dlbook-lab-11 .ag-lesson-simulator__controls { border-right: 0; border-bottom: 1px solid #dce5f4; }
    .agf-dlbook-lab-11 .ag-transformer-workspace,
    .ag-transformer-attention-step { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 620px) {
    .ag-transformer-guide > header { grid-template-columns: minmax(0, 1fr); }
    .ag-transformer-guide > header > span { grid-row: auto; justify-self: start; min-height: 34px; }
    .ag-transformer-guide .ag-transformer-pipeline { grid-template-columns: repeat(9, 112px); }
    .ag-transformer-qkv-concept { grid-template-columns: minmax(0, 1fr); }
    .ag-transformer-token-ribbon { flex-wrap: nowrap; overflow-x: auto; }
    .ag-transformer-step-actions button { min-width: 0; flex: 1; }
}

.ag-framework-graph,
.ag-deploy-pipeline,
.ag-domain-path,
.ag-transfer-network,
.ag-artifact-manifest,
.ag-runtime-timeline,
.ag-precision-bars,
.ag-readiness,
.ag-attention-heatmap {
    width: 100%;
}

.ag-backprop-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 350px;
}

.ag-backprop-node {
    flex: 1 1 84px;
    min-width: 0;
    padding: 12px 8px;
    border: 1px solid #c5d4ef;
    border-radius: 6px;
    background: #fff;
    text-align: center;
}

.ag-backprop-node span,
.ag-backprop-node small { display: block; color: #63718c; font-size: 9px; line-height: 1.3; }
.ag-backprop-node strong { display: block; margin: 5px 0; color: #0f4af2; font-size: 14px; }
.ag-backprop-flow > i { color: #0f4af2; font-style: normal; font-weight: 900; }

/* Lesson 3: complete worked backpropagation example from the book. */
.ag-lesson-simulator--lesson-3 .ag-lesson-simulator__body {
    display: block;
    min-height: 0;
}

.ag-lesson-simulator--lesson-3 .ag-lesson-simulator__controls {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
    border-right: 0;
    border-bottom: 1px solid #d9e3f5;
}

.ag-lesson-simulator--lesson-3 .ag-lab-actions,
.ag-lesson-simulator--lesson-3 .ag-lab-metrics {
    grid-column: 1 / -1;
}

.ag-lesson-simulator--lesson-3 .ag-lesson-simulator__visual {
    min-height: 0;
    padding: 22px;
}

.ag-backprop-worked {
    display: grid;
    gap: 16px;
    width: 100%;
    color: #071331;
}

.ag-backprop-givens {
    display: grid;
    grid-template-columns: minmax(170px, .7fr) minmax(0, 1.3fr);
    align-items: center;
    gap: 18px;
    padding: 16px 18px;
    border: 1px solid #b9cdf7;
    border-left: 4px solid #0f4af2;
    border-radius: 6px;
    background: #eef4ff;
}

.ag-backprop-givens > div span,
.ag-backprop-givens > div strong {
    display: block;
}

.ag-backprop-givens > div span {
    margin-bottom: 4px;
    color: #52627e;
    font-size: 10px;
    font-weight: 750;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.ag-backprop-givens > div strong {
    color: #0f4af2;
    font-size: 16px;
    line-height: 1.25;
}

.ag-backprop-givens dl {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
}

.ag-backprop-givens dl > div {
    min-width: 0;
    padding: 9px 10px;
    border-left: 1px solid #bed0f3;
}

.ag-backprop-givens dt {
    color: #63718c;
    font-size: 9px;
    font-weight: 700;
}

.ag-backprop-givens dd {
    margin: 3px 0 0;
    color: #071331;
    font-size: 15px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.ag-backprop-stage {
    padding: 18px;
    border: 1px solid #d0dcf1;
    border-radius: 6px;
    background: rgba(255,255,255,.97);
}

.ag-backprop-stage > header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
}

.ag-backprop-stage > header > b {
    flex: 0 0 28px;
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border-radius: 50%;
    background: #0f4af2;
    color: #fff;
    font-size: 12px;
}

.ag-backprop-stage h5 {
    margin: 0 0 3px;
    color: #071331;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.25;
}

.ag-backprop-stage header p {
    margin: 0;
    color: #63718c;
    font-size: 11px;
    line-height: 1.45;
}

.ag-backprop-equations {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.ag-backprop-equation {
    min-width: 0;
    padding: 13px;
    border: 1px solid #d5dff0;
    border-top: 3px solid #7ea5f8;
    border-radius: 5px;
    background: #f8faff;
}

.ag-backprop-equation.is-loss { border-top-color: #e84b55; }
.ag-backprop-equation.is-gradient { border-top-color: #12a879; background: #f0fbf7; }

.ag-backprop-equation > span,
.ag-backprop-equation > code,
.ag-backprop-equation > small,
.ag-backprop-equation > strong {
    display: block;
}

.ag-backprop-equation > span {
    min-height: 26px;
    color: #52627e;
    font-size: 9px;
    font-weight: 750;
    line-height: 1.35;
    text-transform: uppercase;
}

.ag-backprop-equation > code {
    margin: 7px 0;
    color: #071331;
    font: 700 15px/1.35 Cambria Math, STIX Two Math, Georgia, serif;
    white-space: normal;
}

.ag-backprop-equation > small {
    min-height: 20px;
    color: #63718c;
    font-size: 10px;
    line-height: 1.35;
}

.ag-backprop-equation > strong {
    margin-top: 6px;
    color: #0f4af2;
    font-size: 18px;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

.ag-backprop-equation.is-gradient > strong { color: #087a5b; }

.ag-backprop-chain-rule {
    margin-bottom: 10px;
    padding: 12px;
    border-left: 4px solid #0f4af2;
    background: #eef4ff;
    text-align: center;
}

.ag-backprop-chain-rule code {
    color: #071331;
    font: 750 18px/1.4 Cambria Math, STIX Two Math, Georgia, serif;
    white-space: normal;
}

.ag-backprop-derivatives {
    display: grid;
    grid-template-columns: minmax(0,1fr) 20px minmax(0,1fr) 20px minmax(0,1fr) 20px minmax(0,1.1fr);
    align-items: stretch;
    gap: 6px;
}

.ag-backprop-derivatives > i {
    display: grid;
    place-items: center;
    color: #0f4af2;
    font-style: normal;
    font-size: 18px;
    font-weight: 800;
}

.ag-backprop-update-rule {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border: 1px solid #bed0f3;
    border-radius: 5px;
    background: #eef4ff;
}

.ag-backprop-update-rule code {
    color: #071331;
    font: 750 17px/1.4 Cambria Math, STIX Two Math, Georgia, serif;
    white-space: normal;
}

.ag-backprop-update-rule strong {
    color: #0f4af2;
    font-size: 17px;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.ag-backprop-after {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 10px;
}

.ag-backprop-after > div {
    padding: 10px 12px;
    border-bottom: 2px solid #0f4af2;
    background: #f8faff;
}

.ag-backprop-after span,
.ag-backprop-after strong {
    display: block;
}

.ag-backprop-after span {
    color: #63718c;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
}

.ag-backprop-after strong {
    margin-top: 4px;
    color: #071331;
    font-size: 16px;
    font-variant-numeric: tabular-nums;
}

.ag-backprop-loss-change {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(120px, .8fr) auto;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}

.ag-backprop-loss-change > span {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: #233657;
    font-size: 10px;
}

.ag-backprop-loss-change em {
    color: #0f4af2;
    font-style: normal;
    font-variant-numeric: tabular-nums;
}

.ag-backprop-loss-change > div {
    height: 8px;
    overflow: hidden;
    border-radius: 4px;
    background: #e3eaf6;
}

.ag-backprop-loss-change > div i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: #12a879;
}

.ag-backprop-loss-change > small {
    color: #087a5b;
    font-size: 10px;
    font-weight: 700;
    white-space: nowrap;
}

.ag-confusion {
    display: grid;
    grid-template-columns: repeat(2, minmax(100px, 170px));
    justify-content: center;
    align-content: center;
    gap: 10px;
    min-height: 350px;
}

.ag-confusion > div {
    display: grid;
    place-items: center;
    aspect-ratio: 1;
    border: 1px solid #c6d4ed;
    border-radius: 6px;
    background: #fff;
    color: #071331;
    text-align: center;
}

.ag-confusion strong { display: block; color: #0f4af2; font-size: 30px; }
.ag-confusion span { font-size: 11px; font-weight: 700; }

.ag-attention-tokens { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.ag-attention-token { min-height: 38px; padding: 8px 12px; border: 1px solid #c7d6f1; border-radius: 5px; background: #fff; color: #071331; font: 650 13px Inter, Arial, sans-serif; cursor: pointer; }
.ag-attention-token.is-active,
.ag-attention-token.is-selected { border-color: #0f4af2; background: #0f4af2; color: #fff; }
.ag-attention-heatmap {
    display: grid;
    grid-template-columns: minmax(68px, 1.35fr) repeat(var(--attention-count, 6), minmax(40px, 1fr));
    align-content: center;
    gap: 5px;
    min-height: 340px;
}
.ag-attention-corner,
.ag-attention-column,
.ag-attention-row,
.ag-attention-cell {
    display: grid;
    place-items: center;
    min-width: 0;
    min-height: 42px;
    padding: 4px;
    border-radius: 4px;
    overflow: hidden;
    color: #071331;
    font-size: 10px;
    font-style: normal;
    font-weight: 750;
    line-height: 1.15;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.ag-attention-corner { background: #071331; color: #fff; font-size: 9px; }
.ag-attention-column,
.ag-attention-row { border: 1px solid #cbd8ef; background: #fff; }
.ag-attention-cell {
    border: 1px solid rgba(15,74,242,.16);
    background: rgba(15,74,242, calc(.08 + var(--heat) * .76));
    color: #071331;
    font-variant-numeric: tabular-nums;
}

.ag-transformer-prompt textarea {
    width: 100%;
    min-height: 76px;
    resize: vertical;
    padding: 10px 11px;
    border: 1px solid #c9d8f2;
    border-radius: 5px;
    background: #fff;
    color: #071331;
    font: 650 12px/1.45 Inter, Arial, sans-serif;
}

.ag-transformer-prompt small {
    display: block;
    margin-top: 5px;
    color: #63718c;
    font-size: 9px;
}

.ag-transformer-studio {
    display: grid;
    gap: 16px;
    min-width: 0;
}

.ag-transformer-note {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 9px 14px;
    align-items: center;
    padding: 11px 13px;
    border: 1px solid #c9d8f2;
    border-left: 4px solid #0f4af2;
    border-radius: 5px;
    background: #f5f8ff;
}

.ag-transformer-note strong { color: #0f4af2; font-size: 11px; white-space: nowrap; }
.ag-transformer-note span { color: #52617b; font-size: 10px; line-height: 1.45; }

.ag-transformer-pipeline-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    align-items: start;
    min-width: 0;
}

.ag-transformer-pipeline {
    display: flex;
    gap: 6px;
    min-width: 0;
    padding: 2px 2px 7px;
    overflow-x: auto;
    scrollbar-width: thin;
}

.ag-transformer-pipeline button {
    flex: 0 0 112px;
    min-height: 48px;
    padding: 7px;
    border: 1px solid #cad8ef;
    border-radius: 5px;
    background: #fff;
    color: #52617b;
    font: 750 10px/1.25 Inter, Arial, sans-serif;
    cursor: pointer;
}

.ag-transformer-pipeline button.is-selected {
    border-color: #0f4af2;
    background: #0f4af2;
    color: #fff;
    box-shadow: 0 5px 16px rgba(15,74,242,.18);
}

.ag-transformer-expand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 8px 12px;
    border: 1px solid #0f4af2;
    border-radius: 5px;
    background: #fff;
    color: #0f4af2;
    font: 750 10px/1.2 Inter, Arial, sans-serif;
    white-space: nowrap;
    cursor: pointer;
}

body.ag-transformer-lock { overflow: hidden !important; }

.ag-lesson-simulator.is-transformer-expanded {
    position: fixed;
    inset: 12px;
    z-index: 999999;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    max-height: calc(100vh - 24px);
    overflow: hidden;
    border-color: #8ba9e5;
    box-shadow: 0 30px 80px rgba(7,19,49,.34);
}

.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__head { padding: 15px 22px; }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__head p { max-width: 980px; margin-top: 5px; }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__body { grid-template-columns: 290px minmax(0,1fr); min-height: 0; overflow: hidden; }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__controls,
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__visual { min-height: 0; overflow-y: auto; }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__controls { padding: 17px; }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__visual { padding: 17px; }
.ag-lesson-simulator.is-transformer-expanded .ag-transformer-workspace { grid-template-columns: minmax(0,1fr) 250px; }
.ag-lesson-simulator.is-transformer-expanded .ag-transformer-lower { grid-template-columns: minmax(0,1.25fr) minmax(280px,.75fr); }
.ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__footer { padding: 9px 20px; }

.ag-transformer-token-ribbon {
    display: flex;
    gap: 7px;
    min-width: 0;
    padding: 3px 2px 8px;
    overflow-x: auto;
    scrollbar-width: thin;
}

.ag-transformer-token-ribbon button {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 38px;
    padding: 7px 11px;
    border: 1px solid #cbd8ef;
    border-radius: 5px;
    background: #fff;
    color: #172744;
    font: 700 11px/1.2 Inter, Arial, sans-serif;
    white-space: nowrap;
    cursor: pointer;
}

.ag-transformer-token-ribbon button span {
    display: grid;
    place-items: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #eaf0ff;
    color: #0f4af2;
    font-size: 8px;
}

.ag-transformer-token-ribbon button.is-selected { border-color: #0f4af2; background: #0f4af2; color: #fff; }
.ag-transformer-token-ribbon button.is-selected span { background: #fff; color: #0f4af2; }

.ag-transformer-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 205px;
    gap: 12px;
    min-width: 0;
}

.ag-transformer-stage,
.ag-transformer-inspector,
.ag-transformer-panel,
.ag-transformer-head-atlas,
.ag-transformer-output {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #d3def1;
    border-radius: 6px;
    background: #fff;
}

.ag-transformer-stage > header,
.ag-transformer-panel > header,
.ag-transformer-head-atlas > header,
.ag-transformer-output > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 11px 13px;
    border-bottom: 1px solid #dce5f4;
}

.ag-transformer-stage > header > div { display: flex; align-items: center; gap: 8px; min-width: 0; }
.ag-transformer-stage > header span:first-child,
.ag-transformer-panel h5,
.ag-transformer-head-atlas h5,
.ag-transformer-output h5 { margin: 0; color: #071331; font-size: 12px; font-weight: 800; }
.ag-transformer-stage > header strong { padding: 4px 6px; border-radius: 4px; background: #eaf0ff; color: #0f4af2; font-size: 8px; }
.ag-transformer-stage > header > span,
.ag-transformer-panel header span,
.ag-transformer-head-atlas header span,
.ag-transformer-output header span { color: #63718c; font-size: 9px; text-align: right; }
.ag-transformer-stage > div { min-height: 300px; padding: 13px; }

.ag-transformer-inspector {
    display: grid;
    align-content: start;
    gap: 9px;
    padding: 14px;
}

.ag-transformer-inspector > span { color: #63718c; font-size: 9px; font-weight: 750; text-transform: uppercase; }
.ag-transformer-inspector > strong { color: #0f4af2; font-size: 20px; overflow-wrap: anywhere; }
.ag-transformer-inspector dl { display: grid; gap: 0; margin: 4px 0; }
.ag-transformer-inspector dl > div { display: flex; justify-content: space-between; gap: 9px; padding: 8px 0; border-bottom: 1px solid #e0e8f6; }
.ag-transformer-inspector dt { color: #63718c; font-size: 9px; }
.ag-transformer-inspector dd { margin: 0; color: #071331; font: 750 9px/1.25 Inter, Arial, sans-serif; text-align: right; }
.ag-transformer-inspector code { display: block; padding: 10px; border-radius: 5px; background: #071331; color: #fff; font: 650 9px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }

.ag-transformer-token-cards {
    display: grid;
    grid-template-columns: repeat(4,minmax(0,1fr));
    gap: 8px;
}

.ag-transformer-token-cards > div { min-width: 0; padding: 10px; border: 1px solid #d5e0f2; border-radius: 5px; background: #f7f9fe; }
.ag-transformer-token-cards span,
.ag-transformer-token-cards small { display: block; color: #71809a; font-size: 8px; }
.ag-transformer-token-cards strong { display: block; margin: 7px 0; overflow: hidden; color: #071331; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }

.ag-transformer-qkv-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; }
.ag-transformer-matrix-card { min-width: 0; overflow: hidden; border: 1px solid #d6e1f3; border-radius: 5px; background: #fff; }
.ag-transformer-matrix-card > header { display: flex; justify-content: space-between; gap: 8px; padding: 8px 9px; border-bottom: 1px solid #e1e8f5; }
.ag-transformer-matrix-card > header strong { color: #172744; font-size: 9px; }
.ag-transformer-matrix-card > header span { color: #77859c; font-size: 8px; }
.ag-transformer-matrix-scroll { width: 100%; overflow-x: auto; }
.ag-transformer-matrix { display: grid; grid-template-columns: minmax(54px,auto) repeat(var(--matrix-columns),minmax(38px,1fr)); gap: 3px; min-width: max-content; padding: 8px; }
.ag-transformer-matrix b,
.ag-transformer-matrix span { display: grid; place-items: center; min-width: 38px; min-height: 34px; padding: 3px; border-radius: 3px; font: 700 8px/1.1 Inter, Arial, sans-serif; font-variant-numeric: tabular-nums; }
.ag-transformer-matrix b { justify-content: start; min-width: 54px; color: #52617b; }
.ag-transformer-matrix span { border: 1px solid rgba(15,74,242,.08); }
.ag-transformer-matrix span.is-masked { background: #eef2f8 !important; color: #8995a8 !important; }

.ag-transformer-attention-grid {
    display: grid;
    grid-template-columns: minmax(58px,auto) repeat(var(--attention-columns),minmax(42px,1fr));
    gap: 3px;
    min-width: max-content;
    padding: 10px;
}

.ag-transformer-panel > div[data-transformer-attention] { overflow-x: auto; }
.ag-transformer-attention-grid > span,
.ag-transformer-attention-grid > b { display: grid; place-items: center; min-width: 42px; min-height: 36px; padding: 3px; border-radius: 3px; color: #172744; font: 750 8px/1.1 Inter, Arial, sans-serif; font-variant-numeric: tabular-nums; }
.ag-transformer-attention-grid > b { border: 1px solid #d5dfef; background: #fff; }
.ag-transformer-attention-grid > span:not(.ag-transformer-attention-corner):not(.is-masked) { border: 1px solid rgba(15,74,242,.12); background: rgba(15,74,242,calc(.08 + var(--heat)*.82)); }
.ag-transformer-attention-grid > span.is-masked { background: #edf1f7; color: #8d98a9; }
.ag-transformer-attention-grid .ag-transformer-attention-corner { min-width: 58px; background: #071331; color: #fff; }

.ag-transformer-score-view { display: grid; gap: 12px; }
.ag-transformer-mask-explainer {
    display: grid;
    grid-template-columns: minmax(150px,.34fr) minmax(0,1fr);
    gap: 14px;
    align-items: start;
    padding: 14px;
    border: 1px solid #c9d8f7;
    border-left: 4px solid #0f4af2;
    border-radius: 6px;
    background: #f5f8ff;
    color: #172744;
}
.ag-transformer-mask-explainer__label {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    min-height: 30px;
    padding: 6px 9px;
    border-radius: 4px;
    background: #e3ebff;
    color: #0f4af2;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.3;
}
.ag-transformer-mask-explainer strong { display: block; margin-bottom: 5px; color: #071331; font-size: 12px; line-height: 1.4; }
.ag-transformer-mask-explainer p { margin: 0 0 9px; color: #465875; font-size: 10px; line-height: 1.65; }
.ag-transformer-mask-explainer code { display: block; overflow-x: auto; padding: 9px 10px; border-radius: 4px; background: #071331; color: #fff; font: 700 9px/1.5 Inter, Arial, sans-serif; white-space: nowrap; }
.ag-transformer-mask-explainer.is-bidirectional { border-left-color: #12a879; background: #f2fbf8; }
.ag-transformer-mask-explainer.is-bidirectional .ag-transformer-mask-explainer__label { background: #dff7ef; color: #08785a; }

.ag-transformer-context-view { display: grid; gap: 12px; }
.ag-transformer-context-sources,
.ag-transformer-context-result { overflow: hidden; border: 1px solid #d4e0f4; border-radius: 6px; background: #fff; }
.ag-transformer-context-sources > header,
.ag-transformer-context-result > header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 13px; border-bottom: 1px solid #dfe7f4; background: #f7f9fe; }
.ag-transformer-context-sources header span,
.ag-transformer-context-result header span { display: block; margin-bottom: 4px; color: #63718c; font-size: 8px; font-weight: 800; text-transform: uppercase; }
.ag-transformer-context-sources header strong,
.ag-transformer-context-result header strong { color: #071331; font-size: 12px; line-height: 1.35; }
.ag-transformer-context-sources header em,
.ag-transformer-context-result header em { flex: 0 0 auto; color: #0f4af2; font-size: 9px; font-style: normal; font-weight: 800; }
.ag-transformer-context-token-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(92px,1fr)); gap: 8px; padding: 12px; }
.ag-transformer-context-token-grid > div { min-width: 0; padding: 9px; border: 1px solid #d7e2f4; border-radius: 5px; background: #f9fbff; }
.ag-transformer-context-token-grid > div.is-query { border-color: #0f4af2; background: #eef3ff; }
.ag-transformer-context-token-grid span,
.ag-transformer-context-token-grid strong { display: block; overflow: hidden; color: #172744; font-size: 9px; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
.ag-transformer-context-token-grid i { display: block; height: 6px; margin: 8px 0 6px; overflow: hidden; border-radius: 3px; background: #e2e9f5; }
.ag-transformer-context-token-grid i b { display: block; height: 100%; border-radius: inherit; background: #0f4af2; }
.ag-transformer-context-token-grid strong { color: #0f4af2; font-variant-numeric: tabular-nums; }
.ag-transformer-context-dimensions { display: grid; grid-template-columns: repeat(auto-fit,minmax(58px,1fr)); gap: 6px; padding: 12px; }
.ag-transformer-context-dimensions > div { display: grid; min-height: 58px; place-items: center; padding: 7px; border: 1px solid #cbd9f4; border-radius: 5px; background: #eaf0ff; }
.ag-transformer-context-dimensions > div.is-negative { border-color: #f1c9cd; background: #fff0f1; }
.ag-transformer-context-dimensions span { color: #61718d; font-size: 8px; font-weight: 800; }
.ag-transformer-context-dimensions strong { color: #0f4af2; font-size: 12px; font-variant-numeric: tabular-nums; }
.ag-transformer-context-dimensions > div.is-negative strong { color: #c83d49; }
.ag-transformer-context-result > p { margin: 0; padding: 0 13px 13px; color: #53637e; font-size: 9px; line-height: 1.6; }
.ag-transformer-context-result > p strong { color: #071331; }

@media (max-width: 720px) {
    .ag-transformer-mask-explainer { grid-template-columns: 1fr; }
    .ag-transformer-context-sources > header,
    .ag-transformer-context-result > header { align-items: flex-start; flex-direction: column; }
}

.ag-transformer-vector-stack { display: grid; gap: 9px; }
.ag-transformer-vector-stack > section { padding: 9px; border: 1px solid #d9e3f3; border-radius: 5px; background: #f8faff; }
.ag-transformer-vector-stack > section > span { display: block; margin-bottom: 7px; color: #172744; font-size: 9px; font-weight: 800; }
.ag-transformer-vector-bars { display: grid; gap: 4px; }
.ag-transformer-vector-bars > div { display: grid; grid-template-columns: 28px minmax(0,1fr) 38px; align-items: center; gap: 6px; }
.ag-transformer-vector-bars span,
.ag-transformer-vector-bars strong { color: #63718c; font-size: 7px; font-variant-numeric: tabular-nums; }
.ag-transformer-vector-bars i { height: 6px; overflow: hidden; border-radius: 3px; background: #e6edf8; }
.ag-transformer-vector-bars i b { display: block; height: 100%; border-radius: inherit; background: #0f4af2; }
.ag-transformer-vector-bars i b.is-negative { background: #e84b55; }

.ag-transformer-probabilities,
.ag-transformer-output > div { display: grid; gap: 7px; padding: 12px; }
.ag-transformer-probabilities > div,
.ag-transformer-output > div > div { display: grid; grid-template-columns: minmax(70px,.7fr) minmax(90px,1.3fr) 40px; align-items: center; gap: 8px; }
.ag-transformer-probabilities span,
.ag-transformer-output span { color: #233657; font-size: 9px; font-weight: 700; }
.ag-transformer-probabilities i,
.ag-transformer-output i { height: 7px; overflow: hidden; border-radius: 4px; background: #e5ecf8; }
.ag-transformer-probabilities i b,
.ag-transformer-output i b { display: block; height: 100%; border-radius: inherit; background: #0f4af2; }
.ag-transformer-probabilities strong,
.ag-transformer-output strong { color: #071331; font-size: 9px; text-align: right; font-variant-numeric: tabular-nums; }

.ag-transformer-lower { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(230px,.85fr); gap: 12px; }
.ag-transformer-flow { display: grid; gap: 7px; padding: 11px; }
.ag-transformer-flow > div { display: grid; grid-template-columns: minmax(45px,.7fr) minmax(70px,1fr) minmax(45px,.7fr) 30px; align-items: center; gap: 6px; padding: 5px 7px; border-radius: 4px; background: #f6f8fc; }
.ag-transformer-flow > div.is-strongest { background: #eaf0ff; }
.ag-transformer-flow span { min-width: 0; overflow: hidden; color: #52617b; font-size: 8px; text-overflow: ellipsis; white-space: nowrap; }
.ag-transformer-flow i { height: 6px; overflow: hidden; border-radius: 3px; background: #e0e8f6; }
.ag-transformer-flow i b { display: block; height: 100%; border-radius: inherit; background: #0f4af2; }
.ag-transformer-flow strong { color: #071331; font-size: 8px; text-align: right; }

.ag-transformer-head-atlas > div { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; padding: 11px; }
.ag-transformer-head-atlas button { min-width: 0; min-height: 76px; padding: 9px; border: 1px solid #d2def1; border-radius: 5px; background: #fff; color: #172744; text-align: left; cursor: pointer; }
.ag-transformer-head-atlas button.is-selected { border-color: #0f4af2; background: #f0f4ff; box-shadow: inset 0 3px 0 #0f4af2; }
.ag-transformer-head-atlas button span,
.ag-transformer-head-atlas button strong,
.ag-transformer-head-atlas button small { display: block; }
.ag-transformer-head-atlas button span { color: #0f4af2; font-size: 8px; font-weight: 800; text-transform: uppercase; }
.ag-transformer-head-atlas button strong { margin: 6px 0; overflow: hidden; font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.ag-transformer-head-atlas button small { color: #63718c; font-size: 7px; line-height: 1.35; }

/* The book article is narrower than the browser viewport, so the Transformer
   laboratory responds to its real content width instead of the window width. */
#lesson-978 .ag-book__lesson-lab {
    container-type: inline-size;
}

@container (max-width: 760px) {
    #lesson-978 .ag-lesson-simulator__body {
        grid-template-columns: minmax(0, 1fr);
    }

    #lesson-978 .ag-lesson-simulator__controls {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
        border-right: 0;
        border-bottom: 1px solid #dce5f4;
    }

    #lesson-978 .ag-lesson-simulator__controls > .ag-transformer-prompt,
    #lesson-978 .ag-lesson-simulator__controls > .ag-lab-button,
    #lesson-978 .ag-lesson-simulator__controls > .ag-lab-metrics {
        grid-column: 1 / -1;
    }

    #lesson-978 .ag-transformer-pipeline-wrap,
    #lesson-978 .ag-transformer-workspace,
    #lesson-978 .ag-transformer-lower,
    #lesson-978 .ag-transformer-qkv-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    #lesson-978 .ag-transformer-pipeline {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        overflow: visible;
    }

    #lesson-978 .ag-transformer-pipeline button {
        width: 100%;
        min-width: 0;
    }

    #lesson-978 .ag-transformer-expand {
        width: 100%;
    }

    #lesson-978 .ag-transformer-token-ribbon {
        flex-wrap: wrap;
        overflow: visible;
    }

    #lesson-978 .ag-transformer-token-cards {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    #lesson-978 .ag-transformer-head-atlas > div {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@container (max-width: 480px) {
    #lesson-978 .ag-lesson-simulator__controls {
        grid-template-columns: minmax(0, 1fr);
    }

    #lesson-978 .ag-transformer-pipeline,
    #lesson-978 .ag-transformer-token-cards,
    #lesson-978 .ag-transformer-head-atlas > div {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    #lesson-978 .ag-transformer-note {
        grid-template-columns: minmax(0, 1fr);
    }

    #lesson-978 .ag-transformer-note strong {
        white-space: normal;
    }
}

@media (min-width: 621px) {
    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__body {
        grid-template-columns: 290px minmax(0, 1fr);
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__controls {
        display: block;
        border-right: 1px solid #dce5f4;
        border-bottom: 0;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-pipeline-wrap {
        grid-template-columns: minmax(0, 1fr) auto;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-pipeline {
        display: flex;
        overflow-x: auto;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-pipeline button {
        flex: 0 0 112px;
        width: auto;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-expand {
        width: auto;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-token-ribbon {
        flex-wrap: nowrap;
        overflow-x: auto;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-workspace {
        grid-template-columns: minmax(0, 1fr) 250px;
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-lower {
        grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-qkv-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-token-cards,
    #lesson-978 .ag-lesson-simulator.is-transformer-expanded .ag-transformer-head-atlas > div {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.ag-framework-graph,
.ag-deploy-pipeline,
.ag-domain-path {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    margin-bottom: 18px;
}

.ag-framework-graph > div,
.ag-deploy-pipeline > div,
.ag-domain-path > div {
    position: relative;
    flex: 1 1 110px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    min-height: 94px;
    padding: 12px;
    border: 1px solid #c9d7ef;
    border-radius: 6px;
    background: #fff;
}

.ag-framework-graph span,
.ag-deploy-pipeline span,
.ag-domain-path span { color: #63718c; font-size: 10px; font-weight: 750; }
.ag-framework-graph strong,
.ag-deploy-pipeline strong,
.ag-domain-path strong { margin-top: 5px; color: #071331; font-size: 13px; overflow-wrap: anywhere; }
.ag-framework-graph small,
.ag-domain-path small { margin-top: 4px; color: #63718c; font-size: 9px; }
.ag-framework-graph > i,
.ag-deploy-pipeline > i,
.ag-domain-path > i { align-self: center; color: #0f4af2; font-style: normal; font-weight: 900; }
.ag-deploy-pipeline > div::after { position: absolute; inset: auto 0 0; height: 4px; width: var(--load); max-width: 100%; background: #0f4af2; content: ""; }

.ag-deploy-pipeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.ag-deploy-pipeline > div {
    min-height: 112px;
    padding: 12px 9px;
    text-align: center;
}

.ag-deploy-pipeline > div small {
    margin-bottom: 5px;
    color: #0f4af2;
    font-size: 8px;
    font-weight: 850;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.ag-deploy-pipeline > div span {
    min-height: 28px;
    color: #43516e;
    font-size: 9px;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.ag-deploy-pipeline > div strong {
    font-size: 18px;
    font-variant-numeric: tabular-nums;
}

.ag-lab-code {
    overflow: auto;
    min-height: 180px;
    margin: 0;
    padding: 18px;
    border: 1px solid #bcd0f0;
    border-radius: 6px;
    background: #071331;
    color: #e9f0ff;
    font: 12px/1.65 Consolas, monospace;
    white-space: pre-wrap;
}

.ag-runtime-timeline,
.ag-precision-bars { display: grid; align-content: center; gap: 14px; min-height: 340px; }
.ag-runtime-timeline > div,
.ag-precision-bars > div { display: grid; grid-template-columns: minmax(90px, 150px) minmax(0, 1fr) auto; align-items: center; gap: 12px; }
.ag-runtime-timeline > div { min-height: 48px; padding: 9px 12px; border: 1px solid #c9d7ef; border-left: 6px solid #0f4af2; border-radius: 5px; background: #fff; width: max(42%, var(--share)); }
.ag-runtime-timeline span,
.ag-precision-bars span { color: #071331; font-size: 12px; font-weight: 700; }
.ag-runtime-timeline b { color: #0f4af2; font-size: 12px; }
.ag-precision-bars i { overflow: hidden; height: 13px; border-radius: 999px; background: #e1e9f7; }
.ag-precision-bars i b { display: block; height: 100%; border-radius: inherit; }

.ag-transfer-network { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 9px; align-content: center; min-height: 340px; }
.ag-transfer-network > div { min-width: 0; min-height: 90px; padding: 12px 8px; border: 1px solid #c7d5ed; border-radius: 6px; background: #fff; }
.ag-transfer-network span,
.ag-transfer-network b { display: block; overflow-wrap: anywhere; }
.ag-transfer-network span { color: #071331; font-size: 11px; font-weight: 750; }
.ag-transfer-network b { margin-top: 8px; color: #63718c; font-size: 9px; text-transform: uppercase; }
.ag-transfer-network .is-trainable { border-color: #0f4af2; background: #eaf0ff; }
.ag-transfer-network .is-trainable b { color: #0f4af2; }

.ag-artifact-manifest { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; align-content: center; min-height: 340px; }
.ag-artifact-manifest > div { min-width: 0; min-height: 90px; padding: 14px; border: 1px solid #c9d7ef; border-radius: 6px; background: #fff; }
.ag-artifact-manifest span,
.ag-artifact-manifest strong { display: block; overflow-wrap: anywhere; }
.ag-artifact-manifest span { color: #63718c; font-size: 10px; font-weight: 750; text-transform: uppercase; }
.ag-artifact-manifest strong { margin-top: 8px; color: #071331; font-size: 13px; }

.ag-readiness-checks { display: grid; gap: 7px; }
.ag-readiness-checks label { display: flex; align-items: center; gap: 8px; min-height: 35px; color: #233657; font-size: 12px; font-weight: 650; }
.ag-readiness-checks input { width: 17px; height: 17px; accent-color: #0f4af2; }
.ag-readiness { display: grid; grid-template-columns: minmax(150px, .65fr) minmax(0, 1.35fr); align-items: center; gap: 24px; min-height: 340px; }
.ag-readiness-ring { --score: 0; display: grid; place-content: center; width: 180px; aspect-ratio: 1; margin: auto; border-radius: 50%; background: radial-gradient(circle at center, #fff 58%, transparent 59%), conic-gradient(#0f4af2 calc(var(--score) * 1%), #dfe7f5 0); text-align: center; }
.ag-readiness-ring strong { color: #071331; font-size: 28px; }
.ag-readiness-ring span { color: #63718c; font-size: 11px; font-weight: 700; }
.ag-readiness-roadmap { display: grid; gap: 10px; }
.ag-readiness-roadmap > div { display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: 4px 10px; padding: 13px; border: 1px solid #cbd8ef; border-radius: 6px; background: #fff; }
.ag-readiness-roadmap span { grid-row: 1 / 3; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: #0f4af2; color: #fff; font-weight: 800; }
.ag-readiness-roadmap strong { color: #071331; font-size: 13px; }
.ag-readiness-roadmap small { color: #63718c; font-size: 10px; }

.ag-lesson-simulator__error { padding: 18px; border: 1px solid #f0c8cd; border-radius: 6px; background: #fff4f5; color: #a52936; font: 650 14px/1.5 Inter, Arial, sans-serif; }

/* Lesson 8: full CNN forward-pass studio. */
.ag-cnn-upload {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 7px 10px;
    align-items: center;
    min-height: 76px;
    padding: 12px;
    border: 1px dashed #9db6e8;
    border-radius: 6px;
    background: #fff;
    color: #233657;
}

.ag-cnn-upload > span { grid-column: 1 / -1; font-size: 12px; font-weight: 750; }
.ag-cnn-upload input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.ag-cnn-upload b { display: inline-grid; place-items: center; min-height: 34px; padding: 6px 10px; border-radius: 5px; background: #0f4af2; color: #fff; font-size: 12px; cursor: pointer; }
.ag-cnn-upload small { min-width: 0; overflow: hidden; color: #63718c; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }

.ag-cnn-studio { display: grid; gap: 18px; min-width: 0; }

.ag-cnn-pipeline-wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: start; min-width: 0; }

.ag-cnn-pipeline {
    display: grid;
    grid-template-columns: repeat(7, minmax(86px, 1fr));
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 3px;
    scrollbar-width: thin;
}

.ag-cnn-pipeline button {
    min-height: 42px;
    padding: 8px;
    border: 1px solid #c8d6ef;
    border-radius: 6px;
    background: #f7f9fd;
    color: #395070;
    font: 700 11px/1.25 Inter, Arial, sans-serif;
    cursor: pointer;
}

.ag-cnn-pipeline button.is-selected { border-color: #0f4af2; background: #0f4af2; color: #fff; }

.ag-cnn-expand { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 42px; padding: 8px 11px; border: 1px solid #0f4af2; border-radius: 6px; background: #fff; color: #0f4af2; font: 750 11px/1.2 Inter, Arial, sans-serif; white-space: nowrap; cursor: pointer; }

body.ag-cnn-lock { overflow: hidden !important; }
.ag-lesson-simulator.is-cnn-expanded { position: fixed; inset: 12px; z-index: 999999; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; max-height: calc(100vh - 24px); overflow: hidden; border-color: #8ba9e5; box-shadow: 0 30px 80px rgba(7,19,49,.34); }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__head { padding: 16px 22px; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__head p { max-width: 900px; margin-top: 5px; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__body { grid-template-columns: 270px minmax(0,1fr); min-height: 0; overflow: hidden; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__controls,
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__visual { min-height: 0; overflow-y: auto; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__controls { padding: 18px; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__visual { padding: 18px; }
.ag-lesson-simulator.is-cnn-expanded .ag-cnn-workspace { grid-template-columns: minmax(0,1.5fr) minmax(210px,.5fr); }
.ag-lesson-simulator.is-cnn-expanded .ag-cnn-channels { grid-template-columns: repeat(6,minmax(0,1fr)); }
.ag-lesson-simulator.is-cnn-expanded .ag-cnn-focus canvas { height: 390px; }
.ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__footer { padding: 10px 20px; }

.ag-cnn-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(190px, .55fr);
    gap: 14px;
    min-width: 0;
}

.ag-cnn-focus,
.ag-cnn-inspector,
.ag-cnn-channel-strip,
.ag-cnn-evidence {
    min-width: 0;
    border: 1px solid #c9d7ef;
    border-radius: 7px;
    background: rgba(255,255,255,.96);
}

.ag-cnn-focus { overflow: hidden; }
.ag-cnn-focus > header,
.ag-cnn-channel-strip > header,
.ag-cnn-evidence > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 54px;
    padding: 12px 15px;
    border-bottom: 1px solid #d9e3f5;
}

.ag-cnn-focus header > div { display: flex; align-items: center; gap: 10px; }
.ag-cnn-focus header span:first-child,
.ag-cnn-channel-strip h5,
.ag-cnn-evidence h5 { margin: 0; color: #071331; font-size: 13px; font-weight: 800; }
.ag-cnn-focus header strong { padding: 4px 7px; border-radius: 4px; background: #eaf0ff; color: #0f4af2; font: 750 10px/1.2 Inter, Arial, sans-serif; }
.ag-cnn-focus header > span,
.ag-cnn-channel-strip header > span,
.ag-cnn-evidence header > span { color: #63718c; font-size: 10px; font-weight: 650; text-align: right; }
.ag-cnn-focus canvas { display: block; width: 100%; height: 350px; }

.ag-cnn-inspector { display: grid; align-content: start; gap: 16px; padding: 16px; }
.ag-cnn-inspector > div > span { display: block; margin-bottom: 9px; color: #63718c; font-size: 10px; font-weight: 750; text-transform: uppercase; }
.ag-cnn-kernel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.ag-cnn-kernel span { display: grid; place-items: center; min-height: 40px; border: 1px solid #d6e1f4; border-radius: 4px; background: #f4f7fd; color: #52617b; font: 750 10px/1 Inter, Arial, sans-serif; font-variant-numeric: tabular-nums; }
.ag-cnn-kernel span.is-positive { background: #eaf0ff; color: #0f4af2; }
.ag-cnn-kernel span.is-negative { background: #fff0f2; color: #c43041; }
.ag-cnn-inspector dl { display: grid; gap: 7px; margin: 0; }
.ag-cnn-inspector dl > div { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-bottom: 1px solid #e2e9f6; }
.ag-cnn-inspector dt { color: #63718c; font-size: 10px; }
.ag-cnn-inspector dd { margin: 0; color: #071331; font: 750 11px/1.2 Inter, Arial, sans-serif; font-variant-numeric: tabular-nums; }
.ag-cnn-inspector code { display: block; padding: 10px; border-radius: 5px; background: #071331; color: #fff; font: 650 10px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }

.ag-cnn-channels { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; padding: 12px; }
.ag-cnn-channel { min-width: 0; padding: 5px; border: 1px solid #d3def1; border-radius: 5px; background: #fff; color: #53627c; cursor: pointer; }
.ag-cnn-channel.is-selected { border-color: #0f4af2; box-shadow: 0 0 0 2px rgba(15,74,242,.12); color: #0f4af2; }
.ag-cnn-channel canvas { display: block; width: 100%; height: 78px; border-radius: 3px; }
.ag-cnn-channel span { display: block; padding: 4px 2px 2px; overflow: hidden; font-size: 9px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }

.ag-cnn-evidence > div { display: grid; gap: 9px; padding: 14px; }
.ag-cnn-evidence > div > div { display: grid; grid-template-columns: minmax(100px, .7fr) minmax(90px, 1.3fr) 38px; align-items: center; gap: 9px; }
.ag-cnn-evidence span { color: #233657; font-size: 10px; font-weight: 700; }
.ag-cnn-evidence i { height: 8px; overflow: hidden; border-radius: 4px; background: #e5ecf8; }
.ag-cnn-evidence i b { display: block; height: 100%; border-radius: inherit; background: #0f4af2; }
.ag-cnn-evidence strong { color: #071331; font-size: 10px; text-align: right; font-variant-numeric: tabular-nums; }

@media (max-width: 900px) {
    .ag-lesson-simulator__body { grid-template-columns: 1fr; }
    .ag-lesson-simulator__controls { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-right: 0; border-bottom: 1px solid #d9e3f5; }
    .ag-lab-metrics,
    .ag-lab-actions,
    .ag-readiness-checks { grid-column: 1 / -1; }
    .ag-framework-graph,
    .ag-deploy-pipeline,
    .ag-domain-path { flex-wrap: wrap; }
    .ag-framework-graph > i,
    .ag-deploy-pipeline > i,
    .ag-domain-path > i { display: none; }
    .ag-cnn-workspace { grid-template-columns: minmax(0, 1fr) 210px; }
    .ag-transformer-workspace,
    .ag-transformer-lower { grid-template-columns: 1fr; }
    .ag-transformer-inspector { grid-template-columns: minmax(120px,.7fr) minmax(0,1.3fr); }
    .ag-transformer-inspector dl { grid-column: 1 / -1; }
    .ag-transformer-inspector code { grid-column: 1 / -1; }
    .ag-transformer-qkv-grid { grid-template-columns: 1fr; }
    .ag-transformer-head-atlas > div { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 620px) {
    .ag-book .ag-book__chapter-header {
        grid-template-columns: minmax(0, 1fr) 92px;
        gap: 16px;
        align-items: start;
    }

    .ag-book .ag-book__chapter-cover {
        max-width: 92px;
        margin-top: 2px;
        box-shadow: 0 10px 24px rgba(7, 19, 49, .16);
    }

    .ag-book .ag-book__chapter-cover-badge {
        right: 4px;
        bottom: 4px;
        padding: 4px;
        font-size: 6px;
    }

    .ag-book__lesson-lab { margin-top: 24px; }
    .ag-lesson-simulator__head { display: block; padding: 20px 18px; }
    .ag-lesson-simulator__head h4 { font-size: 23px; }
    .ag-lesson-simulator__head p { font-size: 14px; }
    .ag-lesson-simulator__engine { margin-top: 14px; }
    .ag-lesson-simulator__controls { display: flex; padding: 18px; }
    .ag-lesson-simulator__visual { min-height: 330px; padding: 14px; }
    .ag-lab-canvas,
    .ag-lab-svg { height: 300px; }
    .ag-lesson-simulator__footer { display: block; padding: 15px 18px; }
    .ag-lesson-simulator__footer a { display: inline-block; margin-top: 8px; }
    .ag-backprop-flow { flex-wrap: wrap; min-height: 300px; }
    .ag-backprop-node { flex-basis: 27%; }
    .ag-backprop-flow > i { display: none; }
    .ag-confusion { grid-template-columns: repeat(2, minmax(90px, 1fr)); min-height: 300px; }
    .ag-attention-heatmap { grid-template-columns: minmax(54px, 1.2fr) repeat(var(--attention-count, 6), minmax(32px, 1fr)); gap: 3px; }
    .ag-attention-corner,
    .ag-attention-column,
    .ag-attention-row,
    .ag-attention-cell { min-height: 34px; font-size: 8px; }
    .ag-transformer-note { grid-template-columns: 1fr; }
    .ag-transformer-note strong { white-space: normal; }
    .ag-transformer-pipeline-wrap { grid-template-columns: minmax(0,1fr); }
    .ag-transformer-expand { width: 100%; }
    .ag-transformer-token-cards { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .ag-transformer-stage > header,
    .ag-transformer-panel > header,
    .ag-transformer-head-atlas > header,
    .ag-transformer-output > header { align-items: flex-start; }
    .ag-transformer-stage > header > span,
    .ag-transformer-panel header span,
    .ag-transformer-head-atlas header span,
    .ag-transformer-output header span { max-width: 135px; }
    .ag-transformer-stage > div { min-height: 260px; padding: 10px; }
    .ag-transformer-inspector { grid-template-columns: 1fr; }
    .ag-transformer-inspector dl,
    .ag-transformer-inspector code { grid-column: auto; }
    .ag-transformer-head-atlas > div { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .ag-transformer-flow > div { grid-template-columns: minmax(42px,.7fr) minmax(60px,1fr) minmax(42px,.7fr) 28px; }
    .ag-lesson-simulator.is-transformer-expanded { inset: 4px; max-height: calc(100vh - 8px); }
    .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__head { padding: 13px 15px; }
    .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__head p { display: none; }
    .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__body { grid-template-columns: 1fr; overflow-y: auto; }
    .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__controls,
    .ag-lesson-simulator.is-transformer-expanded .ag-lesson-simulator__visual { overflow: visible; }
    .ag-lesson-simulator.is-transformer-expanded .ag-transformer-workspace,
    .ag-lesson-simulator.is-transformer-expanded .ag-transformer-lower { grid-template-columns: 1fr; }
    .ag-transfer-network { grid-template-columns: repeat(2, minmax(0, 1fr)); min-height: 300px; }
    .ag-artifact-manifest { grid-template-columns: 1fr; min-height: 300px; }
    .ag-readiness { grid-template-columns: 1fr; min-height: 300px; }
    .ag-runtime-timeline,
    .ag-precision-bars { min-height: 300px; }
    .ag-runtime-timeline > div,
    .ag-precision-bars > div { grid-template-columns: minmax(80px, 120px) minmax(0, 1fr) auto; gap: 8px; }
    .ag-cnn-workspace { grid-template-columns: 1fr; }
    .ag-cnn-focus canvas { height: 300px; }
    .ag-cnn-inspector { grid-template-columns: minmax(150px, .9fr) minmax(0, 1.1fr); }
    .ag-cnn-inspector code { grid-column: 1 / -1; }
    .ag-cnn-channels { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-cnn-channel canvas { height: 92px; }
    .ag-cnn-evidence > div > div { grid-template-columns: minmax(90px, 1fr) minmax(70px, 1fr) 34px; }
    .ag-cnn-pipeline-wrap { grid-template-columns: minmax(0, 1fr); }
    .ag-cnn-expand { width: 100%; }
    .ag-lesson-simulator.is-cnn-expanded { inset: 4px; max-height: calc(100vh - 8px); }
    .ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__head { padding: 13px 15px; }
    .ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__head p { display: none; }
    .ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__body { grid-template-columns: 1fr; overflow-y: auto; }
    .ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__controls { overflow: visible; }
    .ag-lesson-simulator.is-cnn-expanded .ag-lesson-simulator__visual { overflow: visible; }
    .ag-lesson-simulator.is-cnn-expanded .ag-cnn-workspace { grid-template-columns: 1fr; }
    .ag-lesson-simulator.is-cnn-expanded .ag-cnn-channels { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (prefers-reduced-motion: reduce) {
    .ag-lesson-simulator *,
    .ag-lesson-simulator *::before,
    .ag-lesson-simulator *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

/* AG Transfer Learning Lab v2 */
.ag-transfer-control-note {
    display: grid;
    gap: 5px;
    padding: 12px 13px;
    border: 1px solid #bfd0f1;
    border-left: 4px solid #0f4af2;
    border-radius: 6px;
    background: #f6f9ff;
}
.ag-transfer-control-note strong {
    color: #0f4af2;
    font-size: 11px;
    letter-spacing: 0;
}
.ag-transfer-control-note span {
    color: #52617b;
    font-size: 10px;
    line-height: 1.5;
}
.ag-transfer-metrics {
    grid-template-columns: repeat(2,minmax(0,1fr));
}
.ag-transfer-studio {
    display: grid;
    gap: 16px;
    width: 100%;
    min-width: 0;
}
.ag-transfer-overview {
    display: grid;
    grid-template-columns: repeat(3,minmax(0,1fr));
    gap: 9px;
}
.ag-transfer-overview > div {
    display: grid;
    gap: 5px;
    min-width: 0;
    padding: 12px;
    border: 1px solid #c8d7f0;
    border-radius: 6px;
    background: #fff;
}
.ag-transfer-overview span {
    color: #6a7892;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
}
.ag-transfer-overview strong {
    color: #071331;
    font-size: 12px;
    line-height: 1.35;
}
.ag-transfer-overview .ag-transfer-gradient {
    border-color: #8eb0f5;
    background: #eef4ff;
}
.ag-transfer-overview .ag-transfer-gradient strong { color: #0f4af2; }
.ag-transfer-legend {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 9px;
}
.ag-transfer-legend > span {
    display: grid;
    grid-template-columns: 12px auto;
    gap: 3px 8px;
    align-items: center;
    min-width: 0;
    padding: 10px 12px;
    border: 1px solid #d4def0;
    border-radius: 6px;
    background: #fff;
    color: #62708a;
    font-size: 9px;
    line-height: 1.4;
}
.ag-transfer-legend i {
    grid-row: 1 / span 2;
    width: 11px;
    height: 11px;
    border-radius: 3px;
    border: 1px solid #aab8d0;
    background: #eef2f7;
}
.ag-transfer-legend i.is-trainable {
    border-color: #0f4af2;
    background: #0f4af2;
}
.ag-transfer-legend strong { color: #071331; font-size: 10px; }
.ag-transfer-network {
    display: grid;
    grid-template-columns: repeat(5,minmax(0,1fr));
    gap: 24px 9px;
    align-content: center;
    min-height: 330px;
    padding: 24px 0 4px;
}
.ag-transfer-network > div {
    position: relative;
    display: grid;
    grid-template-rows: auto minmax(36px,auto) auto auto;
    align-content: start;
    gap: 7px;
    min-width: 0;
    min-height: 132px;
    padding: 13px 11px;
    border: 1px solid #b8c5d8;
    border-radius: 7px;
    background: #f3f6fa;
    box-shadow: none;
    transition: transform .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
.ag-transfer-network > div:not(:nth-child(5n+1))::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(100% + 1px);
    width: 9px;
    height: 1px;
    background: #9aa8bd;
}
.ag-transfer-network > div:not(:nth-child(5n+1))::before {
    content: "";
    position: absolute;
    top: calc(50% - 3px);
    right: calc(100% - 1px);
    border-width: 3px 0 3px 4px;
    border-style: solid;
    border-color: transparent transparent transparent #9aa8bd;
}
.ag-transfer-network > div > small:not(.ag-transfer-boundary) {
    color: #7c899e;
    font-size: 8px;
    font-weight: 750;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.ag-transfer-network span {
    color: #15213b;
    font-size: 11px;
    font-weight: 780;
    line-height: 1.35;
    overflow-wrap: normal;
    word-break: normal;
}
.ag-transfer-network b {
    display: inline-flex;
    align-items: center;
    width: max-content;
    min-height: 22px;
    margin: 0;
    padding: 4px 7px;
    border-radius: 4px;
    background: #e2e7ef;
    color: #52617b;
    font-size: 8px;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.ag-transfer-network em {
    color: #7b889c;
    font-size: 8px;
    font-style: normal;
    font-variant-numeric: tabular-nums;
}
.ag-transfer-network .is-frozen {
    border-style: dashed;
}
.ag-transfer-network .is-frozen::selection { background: #dce3ee; }
.ag-transfer-network .is-trainable {
    border-color: #0f4af2;
    background: linear-gradient(145deg,#edf3ff 0%,#dce8ff 100%);
    box-shadow: 0 9px 22px rgba(15,74,242,.13);
    transform: translateY(-3px);
}
.ag-transfer-network .is-trainable b {
    background: #0f4af2;
    color: #fff;
}
.ag-transfer-network .is-trainable span { color: #071331; }
.ag-transfer-network .is-trainable::after { background: #0f4af2; }
.ag-transfer-network .is-trainable::before { border-left-color: #0f4af2; }
.ag-transfer-boundary {
    position: absolute;
    left: -1px;
    bottom: calc(100% + 7px);
    display: inline-flex !important;
    width: max-content;
    max-width: 145px;
    padding: 5px 7px;
    border-radius: 4px;
    background: #071331;
    color: #fff !important;
    font-size: 7px !important;
    font-weight: 800;
    letter-spacing: .04em;
    line-height: 1.25;
    text-transform: uppercase;
}
.ag-transfer-boundary::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 12px;
    border: 4px solid transparent;
    border-top-color: #071331;
}
@container ag-simulator (max-width: 820px) {
    .ag-lesson-simulator--lesson-19 .ag-lesson-simulator__body { grid-template-columns: 1fr; }
    .ag-transfer-overview { grid-template-columns: 1fr 1fr; }
    .ag-transfer-overview .ag-transfer-gradient { grid-column: 1 / -1; }
    .ag-transfer-network { grid-template-columns: repeat(2,minmax(0,1fr)); min-height: 0; }
    .ag-transfer-network > div:not(:nth-child(5n+1))::after,
    .ag-transfer-network > div:not(:nth-child(5n+1))::before { display: none; }
}
@container ag-simulator (max-width: 520px) {
    .ag-transfer-overview,
    .ag-transfer-legend { grid-template-columns: 1fr; }
    .ag-transfer-overview .ag-transfer-gradient { grid-column: auto; }
    .ag-transfer-network { grid-template-columns: 1fr; gap: 25px; }
    .ag-transfer-network > div { min-height: 110px; }
    .ag-transfer-boundary { bottom: calc(100% + 5px); }
}

/* AG Transfer Learning architecture v3 */
.ag-lesson-simulator--lesson-19 .ag-lesson-simulator__body {
    grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
}
.ag-transfer-studio {
    gap: 18px;
}
.ag-transfer-architecture-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    min-width: 0;
    padding: 18px 20px;
    border: 1px solid #173f88;
    border-radius: 8px;
    background: linear-gradient(115deg,#061634 0%,#0a2758 58%,#103d83 100%);
    color: #fff;
}
.ag-transfer-architecture-head > div {
    display: grid;
    gap: 3px;
    min-width: 0;
}
.ag-transfer-architecture-head > div > span {
    color: #7de7f3;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.ag-transfer-architecture-head > div > strong {
    color: #fff;
    font-size: 22px;
    line-height: 1.15;
}
.ag-transfer-architecture-head > div > small {
    color: #c9d9f5;
    font-size: 10px;
}
.ag-transfer-architecture-head dl {
    display: grid;
    grid-template-columns: repeat(3,minmax(90px,1fr));
    gap: 8px;
    min-width: min(430px,52%);
    margin: 0;
}
.ag-transfer-architecture-head dl > div {
    display: grid;
    gap: 3px;
    min-width: 0;
    padding: 9px 10px;
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 6px;
    background: rgba(255,255,255,.07);
}
.ag-transfer-architecture-head dt {
    color: #8fb1e8;
    font-size: 8px;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.ag-transfer-architecture-head dd {
    overflow-wrap: anywhere;
    margin: 0;
    color: #fff;
    font-size: 10px;
    font-weight: 750;
}
.ag-transfer-overview {
    grid-template-columns: repeat(2,minmax(0,1fr));
}
.ag-transfer-overview > div {
    border-color: #b9ccee;
    background: #f7faff;
}
.ag-transfer-overview .ag-transfer-gradient {
    border-color: #78dbe8;
    background: #ebfbfd;
}
.ag-transfer-overview .ag-transfer-gradient strong {
    color: #08798b;
}
.ag-transfer-legend > span {
    grid-template-columns: 16px auto;
    padding: 11px 13px;
    border-color: #c9d6ea;
    background: #f9fbff;
}
.ag-transfer-legend i {
    width: 14px;
    height: 22px;
    border-radius: 2px;
    border-color: #8b9bb2;
    background: linear-gradient(135deg,#eef2f7,#ccd5e1);
}
.ag-transfer-legend i.is-trainable {
    border-color: #08a9c0;
    background: linear-gradient(135deg,#32d5e5,#1453ef);
}
.ag-transfer-architecture {
    min-width: 0;
    padding: 15px 14px 12px;
    border: 1px solid #c6d5ec;
    border-radius: 8px;
    background:
        linear-gradient(rgba(15,74,242,.035) 1px,transparent 1px),
        linear-gradient(90deg,rgba(15,74,242,.035) 1px,transparent 1px),
        linear-gradient(180deg,#fbfdff 0%,#f3f7fd 100%);
    background-size: 24px 24px,24px 24px,auto;
    overflow: hidden;
}
.ag-transfer-axis {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 0 3px 10px;
    color: #63718a;
    font-size: 8px;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.ag-transfer-axis span:last-child {
    color: #0b8ea2;
}
.ag-transfer-network {
    display: grid;
    grid-template-columns: repeat(var(--stage-count),minmax(0,1fr));
    gap: 11px;
    align-items: stretch;
    min-height: 0;
    padding: 26px 2px 4px;
}
.ag-transfer-stage {
    position: relative;
    display: grid;
    grid-template-rows: 176px minmax(148px,auto);
    gap: 10px;
    min-width: 0;
}
.ag-transfer-stage__visual {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    min-width: 0;
    height: 176px;
    padding-bottom: 8px;
}
.ag-transfer-stage:not(:last-child) .ag-transfer-stage__visual::after {
    content: "";
    position: absolute;
    z-index: 0;
    right: -11px;
    bottom: 50%;
    width: 12px;
    height: 2px;
    background: #9dabc0;
}
.ag-transfer-stage:not(:last-child) .ag-transfer-stage__visual::before {
    content: "";
    position: absolute;
    z-index: 1;
    right: -11px;
    bottom: calc(50% - 3px);
    border-width: 4px 0 4px 5px;
    border-style: solid;
    border-color: transparent transparent transparent #9dabc0;
}
.ag-transfer-stage.is-trainable:not(:last-child) .ag-transfer-stage__visual::after {
    background: #13b7ca;
}
.ag-transfer-stage.is-trainable:not(:last-child) .ag-transfer-stage__visual::before {
    border-left-color: #13b7ca;
}
.ag-transfer-volume {
    position: relative;
    z-index: 2;
    width: calc(var(--volume-width) + 18px);
    height: calc(var(--volume-height) + 18px);
    max-width: 100%;
}
.ag-transfer-volume i {
    position: absolute;
    left: 50%;
    bottom: 0;
    display: block;
    width: var(--volume-width);
    height: var(--volume-height);
    border: 1px solid #8293ad;
    border-radius: 3px;
    background:
        linear-gradient(rgba(255,255,255,.34) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.34) 1px,transparent 1px),
        linear-gradient(145deg,#f0f3f7 0%,#c5cfdd 100%);
    background-size: 9px 9px,9px 9px,auto;
    box-shadow: 0 7px 16px rgba(7,19,49,.09);
    transform: translate(calc(-50% + var(--slice) * 4px),calc(var(--slice) * -4px));
}
.ag-transfer-stage.is-trainable .ag-transfer-volume i {
    border-color: #0f82b5;
    background:
        linear-gradient(rgba(255,255,255,.22) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.22) 1px,transparent 1px),
        linear-gradient(145deg,#29d7e5 0%,#138ec4 44%,#164ee8 100%);
    background-size: 9px 9px,9px 9px,auto;
    box-shadow: 0 10px 24px rgba(15,94,224,.23);
}
.ag-transfer-stage.is-head .ag-transfer-volume i {
    border-radius: 999px;
}
.ag-transfer-stage__copy {
    display: grid;
    grid-template-rows: auto auto auto auto auto auto;
    align-content: start;
    gap: 5px;
    min-width: 0;
    padding: 10px 8px 8px;
    border-top: 3px solid #aab7c9;
    background: rgba(255,255,255,.72);
}
.ag-transfer-stage.is-trainable .ag-transfer-stage__copy {
    border-top-color: #10b4c8;
    background: rgba(232,251,253,.82);
}
.ag-transfer-stage__copy > small {
    color: #738198 !important;
    font-size: 7px !important;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.ag-transfer-stage__copy > span {
    color: #071331;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.25;
    overflow-wrap: anywhere;
}
.ag-transfer-stage__copy > em {
    min-height: 25px;
    color: #61708a;
    font-size: 8px;
    font-style: normal;
    line-height: 1.35;
}
.ag-transfer-stage__copy > strong {
    color: #0b3681;
    font-size: 8px;
    font-variant-numeric: tabular-nums;
    line-height: 1.3;
}
.ag-transfer-stage__copy > b {
    display: inline-flex;
    align-items: center;
    width: max-content;
    max-width: 100%;
    min-height: 20px;
    margin: 1px 0 0;
    padding: 3px 6px;
    border-radius: 3px;
    background: #e0e6ef;
    color: #52617a;
    font-size: 7px;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.ag-transfer-stage.is-trainable .ag-transfer-stage__copy > b {
    background: #0b8fa5;
    color: #fff;
}
.ag-transfer-stage__copy > mark {
    padding: 0;
    background: none;
    color: #718098;
    font-size: 7px;
    font-variant-numeric: tabular-nums;
}
.ag-transfer-boundary {
    position: absolute;
    z-index: 5;
    top: -24px;
    left: -10px;
    bottom: auto;
    display: inline-flex !important;
    width: max-content;
    max-width: 150px;
    padding: 5px 7px;
    border-radius: 4px;
    background: #071331;
    color: #fff !important;
    font-size: 7px !important;
    font-weight: 800;
    letter-spacing: .04em;
    line-height: 1.25;
    text-transform: uppercase;
}
.ag-transfer-boundary::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 12px;
    height: 176px;
    border-left: 2px dashed #10b4c8;
}
@container ag-simulator (max-width: 1050px) {
    .ag-lesson-simulator--lesson-19 .ag-lesson-simulator__body { grid-template-columns: 1fr; }
    .ag-transfer-network { grid-template-columns: repeat(6,minmax(0,1fr)); row-gap: 28px; }
    .ag-transfer-stage:not(:last-child) .ag-transfer-stage__visual::after,
    .ag-transfer-stage:not(:last-child) .ag-transfer-stage__visual::before { display: none; }
}
@container ag-simulator (max-width: 720px) {
    .ag-transfer-architecture-head { align-items: stretch; flex-direction: column; }
    .ag-transfer-architecture-head dl { min-width: 0; }
    .ag-transfer-network { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .ag-transfer-stage { grid-template-rows: 150px minmax(140px,auto); }
    .ag-transfer-stage__visual { height: 150px; }
    .ag-transfer-boundary::after { height: 150px; }
}
@container ag-simulator (max-width: 470px) {
    .ag-transfer-architecture-head dl,
    .ag-transfer-overview,
    .ag-transfer-legend { grid-template-columns: 1fr; }
    .ag-transfer-network { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .ag-transfer-axis { display: none; }
}

/* Lesson 8: compact, high-contrast CNN instrument panel. */
.ag-lesson-simulator--lesson-8 {
    --cnn-ink: #06122d;
    --cnn-panel: #0a1b3f;
    --cnn-panel-2: #102957;
    --cnn-blue: #1858ff;
    --cnn-cyan: #23d5e8;
    --cnn-mint: #39e0ad;
    --cnn-coral: #ff6472;
    --cnn-line: rgba(116, 166, 255, .3);
}

.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__visual {
    padding: 18px;
    background-color: #06122d;
    background-image:
        linear-gradient(rgba(52, 103, 193, .12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(52, 103, 193, .12) 1px, transparent 1px);
    background-size: 28px 28px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab {
    gap: 14px;
    padding: 17px;
    border-color: var(--cnn-line);
    border-top-color: var(--cnn-cyan);
    background: rgba(8, 24, 55, .96);
    box-shadow: 0 18px 40px rgba(0, 6, 24, .32);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab > header span,
.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab > header strong,
.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow strong,
.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow small {
    color: #f8fbff;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab > header span,
.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow span {
    color: var(--cnn-cyan);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab > header code {
    border: 1px solid rgba(35, 213, 232, .3);
    background: #020a1e;
    color: #b9fbff;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow > div {
    min-height: 80px;
    border-color: var(--cnn-line);
    background: var(--cnn-panel-2);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow > div.is-output {
    border-color: var(--cnn-mint);
    background: rgba(22, 102, 91, .42);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-flow > i { color: var(--cnn-cyan); }

.ag-cnn-geometry-experiment {
    display: grid;
    grid-template-columns: minmax(210px, .78fr) minmax(290px, 1.35fr) minmax(165px, .62fr);
    gap: 11px;
    min-width: 0;
}

.ag-cnn-geometry-experiment > section,
.ag-cnn-geometry-experiment > dl {
    min-width: 0;
    margin: 0;
    padding: 12px;
    border: 1px solid var(--cnn-line);
    border-radius: 6px;
    background: rgba(16, 41, 87, .72);
}

.ag-cnn-geometry-experiment > section > header {
    display: grid;
    gap: 3px;
    min-height: 38px;
    margin-bottom: 9px;
}

.ag-cnn-geometry-experiment > section > header span {
    color: #f8fbff;
    font-size: 10px;
    font-weight: 760;
}

.ag-cnn-geometry-experiment > section > header strong {
    color: var(--cnn-cyan);
    font: 650 9px/1.3 ui-monospace, SFMono-Regular, Consolas, monospace;
    overflow-wrap: anywhere;
}

.ag-cnn-geometry-kernel-grid {
    display: grid;
    grid-template-columns: repeat(var(--kernel-size, 3), minmax(25px, 1fr));
    gap: 3px;
    width: min(100%, 280px);
    margin: 0 auto;
}

.ag-cnn-geometry-kernel-grid span {
    display: grid;
    place-items: center;
    aspect-ratio: 1;
    min-width: 0;
    border: 1px solid rgba(137, 180, 255, .2);
    border-radius: 3px;
    background: #071632;
    color: #b8c9e9;
    font: 650 8px/1 ui-monospace, SFMono-Regular, Consolas, monospace;
    font-variant-numeric: tabular-nums;
}

.ag-cnn-geometry-kernel-grid span.is-positive {
    border-color: rgba(35, 213, 232, .44);
    background: rgba(14, 132, 161, .3);
    color: #c8fbff;
}

.ag-cnn-geometry-kernel-grid span.is-negative {
    border-color: rgba(255, 100, 114, .45);
    background: rgba(151, 43, 66, .32);
    color: #ffd8dc;
}

.ag-cnn-geometry-experiment canvas {
    display: block;
    width: 100%;
    height: 205px;
    border: 1px solid rgba(112, 161, 244, .32);
    border-radius: 5px;
    background: #f7faff;
}

.ag-cnn-geometry-experiment > dl {
    display: grid;
    align-content: center;
    gap: 0;
}

.ag-cnn-geometry-experiment > dl div {
    display: grid;
    gap: 4px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(133, 174, 246, .18);
}

.ag-cnn-geometry-experiment > dl div:last-child { border-bottom: 0; }
.ag-cnn-geometry-experiment dt { color: #8da8d7; font-size: 9px; font-weight: 700; }
.ag-cnn-geometry-experiment dd { margin: 0; color: #fff; font: 750 13px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; }

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab > p {
    border-left-color: var(--cnn-mint);
    background: rgba(57, 224, 173, .1);
    color: #d8f7ee;
}

.ag-real-cnn-result {
    grid-template-columns: 92px minmax(230px, .66fr) minmax(430px, 1.5fr);
    align-items: center;
    gap: 14px;
    margin: 0;
    padding: 12px;
    border-color: rgba(88, 143, 238, .5);
    background: rgba(10, 27, 63, .96);
    box-shadow: 0 16px 38px rgba(0, 5, 24, .24);
}

.ag-real-cnn-sample { gap: 5px; }
.ag-real-cnn-sample canvas { width: 82px; height: 82px; border-color: rgba(35, 213, 232, .55); border-radius: 5px; }
.ag-real-cnn-sample span { color: #91a9d1; font-size: 9px; }
.ag-real-cnn-sample strong { color: var(--cnn-cyan); }

.ag-real-cnn-verdict { gap: 8px; }
.ag-real-cnn-verdict > span { padding: 5px 8px; border-color: rgba(137, 180, 255, .35); background: #06122d; color: #b7c7e4; font-size: 10px; }
.ag-real-cnn-verdict > span.is-correct { border-color: rgba(57, 224, 173, .58); background: rgba(24, 128, 101, .2); color: #9af5d7; }
.ag-real-cnn-verdict > span.is-error { border-color: rgba(255, 100, 114, .58); background: rgba(154, 40, 59, .2); color: #ffc5cb; }
.ag-real-cnn-verdict dl { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.ag-real-cnn-verdict dl div { padding: 8px; border-color: rgba(117, 162, 239, .28); border-radius: 5px; background: rgba(16, 41, 87, .78); }
.ag-real-cnn-verdict dt { color: #86a0ca; font-size: 8px; }
.ag-real-cnn-verdict dd { margin-top: 3px; color: #fff; font-size: 12px; }

.ag-cnn-output-vector {
    min-width: 0;
    padding: 10px;
    border: 1px solid rgba(78, 139, 244, .38);
    border-radius: 6px;
    background: #06122d;
}

.ag-cnn-output-vector > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.ag-cnn-output-vector > header > div { display: flex; align-items: center; gap: 7px; }
.ag-cnn-output-vector > header span { color: #f8fbff; font-size: 10px; font-weight: 800; }
.ag-cnn-output-vector > header strong { padding: 3px 6px; border-radius: 3px; background: rgba(35, 213, 232, .12); color: var(--cnn-cyan); font-size: 8px; }
.ag-cnn-output-vector > header small { color: #7f99c4; font-size: 8px; text-align: right; }
.ag-cnn-output-vector > div { display: grid; gap: 5px; }
.ag-cnn-vector-row { display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 7px; align-items: center; }
.ag-cnn-vector-label { color: #8ea7d2; font-size: 8px; font-weight: 750; text-transform: uppercase; }
.ag-cnn-vector-values { display: grid; grid-template-columns: repeat(10, minmax(25px, 1fr)); gap: 3px; min-width: 0; }
.ag-cnn-vector-values > div { display: grid; place-items: center; gap: 2px; min-width: 0; padding: 4px 2px; border: 1px solid rgba(119, 162, 234, .22); border-radius: 3px; background: #0c2048; }
.ag-cnn-vector-values span { color: #7894c0; font-size: 7px; }
.ag-cnn-vector-values strong { color: #eaf2ff; font: 700 8px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.ag-cnn-vector-values > div.is-predicted { border-color: var(--cnn-mint); background: rgba(30, 126, 102, .34); box-shadow: 0 0 18px rgba(57, 224, 173, .13); }
.ag-cnn-vector-values > div.is-predicted span,
.ag-cnn-vector-values > div.is-predicted strong { color: #a7f8df; }
.ag-cnn-output-vector p { display: flex; align-items: center; gap: 9px; margin: 7px 0 0 59px; color: #8ea7d2; font-size: 8px; }
.ag-cnn-output-vector p b { color: var(--cnn-mint); }
.ag-cnn-output-vector p small { margin-left: auto; color: #6f88b1; }

.ag-lesson-simulator--lesson-8 .ag-cnn-overview > div,
.ag-lesson-simulator--lesson-8 .ag-cnn-pipeline-wrap {
    border-color: rgba(100, 149, 232, .34);
    background: rgba(10, 27, 63, .92);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-overview span { color: #7792be; }
.ag-lesson-simulator--lesson-8 .ag-cnn-overview strong { color: #f7fbff; }
.ag-lesson-simulator--lesson-8 .ag-cnn-pipeline button { border-color: rgba(95, 145, 229, .32); background: #102957; color: #c7d8f5; }
.ag-lesson-simulator--lesson-8 .ag-cnn-pipeline button.is-selected { border-color: var(--cnn-cyan); background: var(--cnn-blue); color: #fff; }
.ag-lesson-simulator--lesson-8 .ag-cnn-expand { border-color: var(--cnn-cyan); background: #071632; color: var(--cnn-cyan); }

@container ag-simulator (max-width: 980px) {
    .ag-real-cnn-result { grid-template-columns: 88px minmax(0, 1fr); }
    .ag-cnn-output-vector { grid-column: 1 / -1; }
    .ag-cnn-geometry-experiment { grid-template-columns: minmax(190px, .8fr) minmax(280px, 1.2fr); }
    .ag-cnn-geometry-experiment > dl { grid-column: 1 / -1; grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .ag-cnn-geometry-experiment > dl div { padding: 7px 10px; border-right: 1px solid rgba(133, 174, 246, .18); border-bottom: 0; }
}

@container ag-simulator (max-width: 650px) {
    .ag-cnn-geometry-experiment { grid-template-columns: 1fr; }
    .ag-cnn-geometry-experiment > dl { grid-column: auto; grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-real-cnn-result { grid-template-columns: 74px minmax(0, 1fr); }
    .ag-real-cnn-sample canvas { width: 66px; height: 66px; }
    .ag-real-cnn-verdict dl { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
    .ag-cnn-vector-row { grid-template-columns: 1fr; }
    .ag-cnn-vector-values { grid-template-columns: repeat(5, minmax(32px, 1fr)); }
    .ag-cnn-output-vector p { margin-left: 0; flex-wrap: wrap; }
}

/* Lesson 6: measured bias-variance decomposition */
.ag-lesson-simulator--lesson-6 .ag-lesson-simulator__body {
    grid-template-columns: minmax(270px, 23%) minmax(0, 1fr);
    min-height: 0;
}

.ag-lesson-simulator--lesson-6 .ag-lesson-simulator__controls {
    gap: 18px;
    padding: 22px;
}

.ag-lesson-simulator--lesson-6 .ag-lesson-simulator__visual {
    min-height: 0;
    padding: 22px;
}

.ag-bv-control-intro {
    padding-bottom: 14px;
    border-bottom: 1px solid #d9e3f5;
}

.ag-bv-control-intro span {
    display: block;
    margin-bottom: 5px;
    color: #0f4af2;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.ag-bv-control-intro p,
.ag-bv-best {
    margin: 0;
    color: #42516d;
    font-size: 12px;
    line-height: 1.55;
}

.ag-bv-best {
    padding: 12px;
    border-left: 3px solid #22b6e8;
    background: #eef8fb;
}

.ag-lesson-simulator--lesson-6 .ag-lab-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ag-lesson-simulator--lesson-6 .ag-lab-metric {
    min-height: 70px;
    padding: 10px;
}

.ag-bv-studio {
    display: grid;
    gap: 16px;
}

.ag-bv-studio__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 15px 17px;
    border: 1px solid #cbd9f2;
    background: #f5f8fe;
}

.ag-bv-studio__head div {
    display: grid;
    gap: 3px;
}

.ag-bv-studio__head span {
    color: #63718c;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-bv-studio__head strong {
    color: #071331;
    font-size: 16px;
    font-variant-numeric: tabular-nums;
}

.ag-bv-studio__head p {
    max-width: 560px;
    margin: 0;
    color: #233657;
    font-size: 12px;
    line-height: 1.5;
    text-align: right;
}

.ag-bv-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    padding: 0 2px;
}

.ag-bv-legend span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: #42516d;
    font-size: 11px;
    font-weight: 700;
}

.ag-bv-legend span::before {
    width: 20px;
    height: 3px;
    background: #0f4af2;
    content: "";
}

.ag-bv-legend .is-train::before,
.ag-bv-legend .is-test::before {
    width: 9px;
    height: 9px;
    border: 2px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 1px #8da0bf;
    background: #071331;
}

.ag-bv-legend .is-test::before {
    border-radius: 1px;
    background: #e84b55;
    transform: rotate(45deg);
}

.ag-bv-legend .is-truth::before { background: #12a879; }
.ag-bv-legend .is-mean::before {
    height: 8px;
    border-top: 2px dashed #22b6e8;
    background: rgba(34, 182, 232, .15);
}

.ag-bv-canvas {
    height: clamp(340px, 34vw, 500px);
    border-color: #cbd9f2;
    border-radius: 4px;
}

.ag-bv-equation {
    border: 1px solid #cbd9f2;
    background: #fff;
}

.ag-bv-equation > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 13px 15px;
    border-bottom: 1px solid #d9e3f5;
    background: #071331;
    color: #fff;
}

.ag-bv-equation > header span {
    color: #9db8ff;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-bv-equation > header strong {
    font-size: 14px;
    text-align: right;
}

.ag-bv-equation > div {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr) auto) minmax(0, 1.15fr);
    align-items: stretch;
}

.ag-bv-equation article {
    display: grid;
    align-content: start;
    gap: 5px;
    min-width: 0;
    padding: 14px;
}

.ag-bv-equation article.is-total { background: #eef3ff; }

.ag-bv-equation article span {
    color: #0f4af2;
    font-size: 11px;
    font-weight: 800;
}

.ag-bv-equation article strong {
    color: #071331;
    font-size: 22px;
    font-variant-numeric: tabular-nums;
}

.ag-bv-equation article small {
    color: #63718c;
    font-size: 10px;
    line-height: 1.45;
}

.ag-bv-equation > div > b {
    display: grid;
    place-items: center;
    color: #0f4af2;
    font-size: 18px;
}

.ag-bv-method {
    margin: 0;
    padding: 13px 15px;
    border-left: 3px solid #12a879;
    background: #ecf8f4;
    color: #29445a;
    font-size: 11px;
    line-height: 1.6;
}

@container ag-simulator (max-width: 1050px) {
    .ag-lesson-simulator--lesson-6 .ag-lesson-simulator__body {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-6 .ag-lesson-simulator__controls {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-right: 0;
        border-bottom: 1px solid #d9e3f5;
    }
    .ag-bv-control-intro,
    .ag-bv-actions,
    .ag-lesson-simulator--lesson-6 .ag-lab-metrics,
    .ag-bv-best {
        grid-column: 1 / -1;
    }
}

@container ag-simulator (max-width: 700px) {
    .ag-bv-studio__head,
    .ag-bv-equation > header {
        display: grid;
    }
    .ag-bv-studio__head p,
    .ag-bv-equation > header strong {
        text-align: left;
    }
    .ag-bv-equation > div {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ag-bv-equation > div > b { display: none; }
    .ag-bv-canvas { height: 350px; }
}

@container ag-simulator (max-width: 520px) {
    .ag-lesson-simulator--lesson-6 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-6 .ag-lab-metrics,
    .ag-bv-equation > div {
        grid-template-columns: 1fr;
    }
    .ag-bv-control-intro,
    .ag-bv-actions,
    .ag-lesson-simulator--lesson-6 .ag-lab-metrics,
    .ag-bv-best {
        grid-column: auto;
    }
    .ag-bv-actions .ag-lab-button { width: 100%; }
    .ag-bv-canvas { height: 320px; }
}

/* Lesson 15: real-image explainability studio */
.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__body {
    grid-template-columns: minmax(250px, 29%) minmax(0, 71%);
}

.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__visual {
    display: block;
    min-width: 0;
    padding: 18px;
    background: #f5f8fe;
}

.ag-xai-disclaimer {
    margin: 4px 0 0;
    padding: 11px 12px;
    border: 1px solid #c8d7f3;
    border-radius: 6px;
    background: #f7f9fd;
    color: #42516d;
    font-size: 11px;
    line-height: 1.55;
}

.ag-xai-disclaimer strong {
    color: #071331;
}

.ag-xai-studio {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, .65fr);
    gap: 16px;
    min-width: 0;
}

.ag-xai-image-card,
.ag-xai-reading {
    min-width: 0;
    border: 1px solid #c9d7ef;
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(7, 19, 49, .08);
}

.ag-xai-image-card {
    overflow: hidden;
}

.ag-xai-photo {
    --ag-xai-intensity: .8;
    --ag-xai-blend: .65;
    position: relative;
    aspect-ratio: 4 / 3;
    min-height: 360px;
    overflow: hidden;
    isolation: isolate;
    background: #071331;
}

.ag-xai-photo > img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 48%;
    display: block;
    filter: saturate(.96) contrast(1.03);
}

.ag-xai-overlay,
.ag-xai-occlusion {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ag-xai-overlay {
    opacity: var(--ag-xai-blend);
    mix-blend-mode: screen;
}

.ag-xai-blob {
    position: absolute;
    display: block;
    border-radius: 999px;
    opacity: var(--ag-xai-intensity);
    filter: blur(24px);
    transform: translateZ(0);
}

.ag-xai-blob.is-head {
    left: 48%;
    top: 22%;
    width: 25%;
    height: 31%;
}

.ag-xai-blob.is-body {
    left: 31%;
    top: 40%;
    width: 49%;
    height: 35%;
}

.ag-xai-blob.is-context {
    left: 7%;
    top: 14%;
    width: 23%;
    height: 24%;
}

.ag-xai-photo[data-xai-method="gradcam"] .ag-xai-blob.is-head,
.ag-xai-photo[data-xai-method="gradcam"] .ag-xai-blob.is-body {
    background: radial-gradient(circle, rgba(255,245,0,.95) 0 20%, rgba(255,95,0,.92) 48%, rgba(227,28,55,0) 78%);
}

.ag-xai-photo[data-xai-method="gradcam"] .ag-xai-blob.is-context {
    background: radial-gradient(circle, rgba(51,203,255,.5), rgba(51,203,255,0) 72%);
    opacity: calc(var(--ag-xai-intensity) * .35);
}

.ag-xai-photo[data-xai-method="shap"] .ag-xai-blob {
    border-radius: 28%;
    filter: blur(12px);
}

.ag-xai-photo[data-xai-method="shap"] .ag-xai-blob.is-head {
    background: repeating-linear-gradient(45deg, rgba(238,52,75,.9) 0 20px, rgba(255,180,0,.72) 20px 40px);
}

.ag-xai-photo[data-xai-method="shap"] .ag-xai-blob.is-body {
    background: repeating-linear-gradient(135deg, rgba(238,52,75,.78) 0 30px, rgba(255,255,255,0) 30px 55px);
}

.ag-xai-photo[data-xai-method="shap"] .ag-xai-blob.is-context {
    background: repeating-linear-gradient(45deg, rgba(18,111,245,.9) 0 18px, rgba(32,190,231,.6) 18px 36px);
}

.ag-xai-occlusion {
    display: none;
    background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px);
    background-size: 12.5% 16.666%;
}

.ag-xai-photo[data-xai-method="occlusion"] .ag-xai-overlay {
    display: none;
}

.ag-xai-photo[data-xai-method="occlusion"] .ag-xai-occlusion {
    display: block;
}

.ag-xai-occlusion > span {
    position: absolute;
    left: 48%;
    top: 22%;
    width: 22%;
    height: 27%;
    border: 3px solid #fff;
    border-radius: 5px;
    background: rgba(7,19,49,calc(.82 * var(--ag-xai-blend)));
    box-shadow: 0 0 0 3px rgba(15,74,242,.9), 0 12px 28px rgba(7,19,49,.32);
}

.ag-xai-prediction {
    position: absolute;
    left: 16px;
    bottom: 16px;
    z-index: 3;
    display: grid;
    grid-template-columns: auto auto;
    gap: 2px 12px;
    max-width: calc(100% - 32px);
    padding: 11px 13px;
    border: 1px solid rgba(255,255,255,.42);
    border-radius: 6px;
    background: rgba(7,19,49,.88);
    color: #fff;
    backdrop-filter: blur(10px);
}

.ag-xai-prediction span {
    grid-column: 1 / -1;
    color: #b9c9ea;
    font-size: 9px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-xai-prediction strong,
.ag-xai-prediction b {
    color: #fff;
    font-size: 14px;
}

.ag-xai-prediction b {
    color: #59dcbd;
}

.ag-xai-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    padding: 12px 14px 8px;
    color: #42516d;
    font-size: 10px;
    font-weight: 700;
}

.ag-xai-legend span::before {
    content: '';
    display: inline-block;
    width: 9px;
    height: 9px;
    margin-right: 6px;
    border-radius: 50%;
    vertical-align: -1px;
}

.ag-xai-legend .is-positive::before { background: #ee344b; }
.ag-xai-legend .is-negative::before { background: #126ff5; }
.ag-xai-legend .is-low::before { background: #cbd5e6; }

.ag-xai-credit {
    margin: 0;
    padding: 0 14px 13px;
    color: #71809b;
    font-size: 9px;
    line-height: 1.45;
}

.ag-xai-reading {
    align-self: stretch;
    padding: 20px;
}

.ag-xai-reading > span {
    color: #0f4af2;
    font-size: 9px;
    font-weight: 900;
    text-transform: uppercase;
}

.ag-xai-reading h5 {
    margin: 8px 0 10px;
    color: #071331;
    font-size: 20px;
    line-height: 1.18;
}

.ag-xai-reading > p,
.ag-xai-method-note p {
    margin: 0;
    color: #42516d;
    font-size: 12px;
    line-height: 1.62;
}

.ag-xai-method-note {
    margin-top: 18px;
    padding: 14px;
    border-left: 3px solid #0f4af2;
    background: #f2f6fe;
}

.ag-xai-method-note strong {
    display: block;
    margin-bottom: 5px;
    color: #071331;
    font-size: 11px;
}

@container ag-simulator (max-width: 980px) {
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__body,
    .ag-xai-studio {
        grid-template-columns: 1fr;
    }

    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__controls {
        border-right: 0;
        border-bottom: 1px solid #d9e3f5;
    }
}

@container ag-simulator (max-width: 560px) {
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__visual {
        padding: 10px;
    }

    .ag-xai-photo {
        min-height: 290px;
    }

    .ag-xai-reading {
        padding: 15px;
    }
}

/* CNN and Transformer studios v3 */
.ag-lesson-simulator--lesson-8,
.ag-lesson-simulator--lesson-11 {
    --lab-blue: #0f4af2;
    --lab-navy: #071331;
    --lab-ink: #101d38;
    --lab-muted: #63718b;
    --lab-line: #c9d7ef;
    --lab-soft: #f4f7fc;
    --lab-cyan: #13b9d6;
    container-type: inline-size;
    container-name: ag-simulator;
    border-color: #b8caf0;
    background: #fff;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head {
    position: relative;
    min-height: 180px;
    padding: 28px 32px;
    background: #081943;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head::after,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 5px;
    background: var(--lab-blue);
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head h4,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head h4 {
    max-width: 720px;
    color: #fff;
    font-size: 30px;
    line-height: 1.08;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head p,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head p {
    max-width: 760px;
    color: #d7e2fb;
    font-size: 13px;
    line-height: 1.65;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__engine,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__engine {
    border-color: transparent;
    background: transparent;
    color: #fff;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__body,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__body {
    grid-template-columns: minmax(240px, 290px) minmax(0, 1fr);
    align-items: start;
    background: #f7f9fd;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__controls {
    position: sticky;
    top: 10px;
    align-self: start;
    gap: 13px;
    min-width: 0;
    padding: 20px;
    border-right: 1px solid var(--lab-line);
    background: #f1f5fb;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__visual,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__visual {
    min-width: 0;
    padding: 20px;
    overflow: hidden;
    background:
        linear-gradient(#e7eefb 1px, transparent 1px),
        linear-gradient(90deg, #e7eefb 1px, transparent 1px),
        #fbfcff;
    background-size: 32px 32px;
}
.ag-cnn-control-intro,
.ag-transformer-control-intro {
    display: grid;
    gap: 5px;
    padding: 12px 13px;
    border: 1px solid #b8caf0;
    border-left: 4px solid var(--lab-blue);
    border-radius: 6px;
    background: #fff;
}
.ag-cnn-control-intro strong,
.ag-transformer-control-intro strong {
    color: var(--lab-ink);
    font-size: 12px;
}
.ag-cnn-control-intro span,
.ag-transformer-control-intro span {
    color: var(--lab-muted);
    font-size: 10px;
    line-height: 1.5;
}
.ag-transformer-run-state {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 9px;
    min-height: 0;
    padding: 6px 0 6px 10px;
    border: 0;
    border-left: 3px solid #9db4df;
    border-radius: 0;
    background: transparent;
    cursor: default;
}
.ag-transformer-run-state span {
    padding: 0;
    border-radius: 0;
    background: transparent;
    color: #1741a8;
    font-size: 9px;
    font-weight: 800;
    text-transform: uppercase;
}
.ag-transformer-run-state strong {
    color: var(--lab-muted);
    font-size: 10px;
    font-weight: 650;
    line-height: 1.45;
}
.ag-transformer-run-state[data-state="running"] {
    border-color: #0f4af2;
    background: transparent;
}
.ag-transformer-run-state[data-state="running"] span {
    background: transparent;
    color: var(--lab-blue);
}
.ag-transformer-run-state[data-state="complete"] {
    border-color: #087f68;
    background: transparent;
}
.ag-transformer-run-state[data-state="complete"] span {
    background: transparent;
    color: #087f68;
}
.ag-lesson-simulator--lesson-11.is-transformer-running .ag-transformer-studio {
    opacity: .68;
    transition: opacity 140ms ease;
}
.ag-lesson-simulator--lesson-11 [data-action="run"]:disabled {
    cursor: wait;
    opacity: .78;
}
.ag-cnn-studio,
.ag-transformer-studio {
    gap: 16px;
    min-width: 0;
}
.ag-cnn-overview,
.ag-transformer-overview {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}
.ag-cnn-overview > div,
.ag-transformer-overview > div {
    display: grid;
    gap: 5px;
    min-width: 0;
    min-height: 74px;
    padding: 12px 14px;
    border: 1px solid #bbcdf0;
    border-top: 3px solid var(--lab-blue);
    border-radius: 6px;
    background: #fff;
}
.ag-cnn-overview span,
.ag-transformer-overview span {
    color: var(--lab-muted);
    font-size: 9px;
    font-weight: 750;
    text-transform: uppercase;
}
.ag-cnn-overview strong,
.ag-transformer-overview strong {
    color: var(--lab-ink);
    font-size: 13px;
    line-height: 1.3;
    overflow-wrap: anywhere;
}
.ag-cnn-pipeline-wrap,
.ag-transformer-pipeline-wrap {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: stretch;
    padding: 10px;
    border: 1px solid #c4d2eb;
    border-radius: 6px;
    background: #fff;
}
.ag-cnn-pipeline,
.ag-transformer-pipeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
    overflow: visible;
}
.ag-cnn-pipeline button,
.ag-transformer-pipeline button {
    position: relative;
    min-width: 0;
    min-height: 48px;
    padding: 8px 6px;
    border: 1px solid #c5d3ec;
    border-radius: 5px;
    background: #f7f9fd;
    color: #42516d;
    font-size: 9px;
    font-weight: 750;
    line-height: 1.25;
    white-space: normal;
}
.ag-cnn-pipeline button.is-selected,
.ag-transformer-pipeline button.is-selected {
    border-color: var(--lab-blue);
    background: var(--lab-blue);
    color: #fff;
    box-shadow: 0 6px 16px rgba(15, 74, 242, .18);
}
.ag-cnn-expand,
.ag-transformer-expand {
    min-width: 92px;
    min-height: 48px;
    border: 1px solid #aac0ed;
    border-radius: 5px;
    background: #eef4ff;
    color: var(--lab-blue);
    font-size: 10px;
    font-weight: 800;
}
.ag-cnn-workspace,
.ag-transformer-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(210px, .75fr);
    gap: 12px;
    min-width: 0;
}
.ag-cnn-focus,
.ag-transformer-stage,
.ag-cnn-inspector,
.ag-transformer-inspector,
.ag-cnn-channel-strip,
.ag-cnn-evidence,
.ag-transformer-panel,
.ag-transformer-head-atlas,
.ag-transformer-output {
    min-width: 0;
    border: 1px solid #c3d2ec;
    border-radius: 6px;
    background: #fff;
    box-shadow: 0 8px 22px rgba(17, 40, 84, .06);
}
.ag-cnn-focus > header,
.ag-transformer-stage > header,
.ag-cnn-channel-strip > header,
.ag-cnn-evidence > header,
.ag-transformer-panel > header,
.ag-transformer-head-atlas > header,
.ag-transformer-output > header {
    min-height: 62px;
    padding: 12px 14px;
    border-bottom: 1px solid #d6e0f2;
    background: #f8faff;
}
.ag-cnn-focus header span:first-child,
.ag-transformer-stage > header span:first-child,
.ag-cnn-channel-strip h5,
.ag-cnn-evidence h5,
.ag-transformer-panel h5,
.ag-transformer-head-atlas h5,
.ag-transformer-output h5 {
    color: var(--lab-ink);
    font-size: 12px;
    line-height: 1.3;
}
.ag-cnn-focus header > span,
.ag-transformer-stage > header > span,
.ag-cnn-channel-strip header > span,
.ag-cnn-evidence header > span,
.ag-transformer-panel header span,
.ag-transformer-head-atlas header span,
.ag-transformer-output header span {
    color: var(--lab-muted);
    font-size: 9px;
    line-height: 1.35;
}
.ag-cnn-focus canvas {
    display: block;
    width: 100%;
    height: auto;
    min-height: 320px;
    max-height: 520px;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    image-rendering: pixelated;
    background: #071331;
}
.ag-cnn-inspector,
.ag-transformer-inspector {
    align-content: start;
    padding: 14px;
    background: #f8faff;
}
.ag-cnn-kernel {
    grid-template-columns: repeat(3, minmax(42px, 1fr));
    gap: 5px;
    margin-top: 9px;
}
.ag-cnn-kernel span {
    display: grid;
    place-items: center;
    min-height: 44px;
    border: 1px solid #c8d6ef;
    border-radius: 4px;
    background: #fff;
    color: #263655;
    font-size: 10px;
    font-variant-numeric: tabular-nums;
}
.ag-cnn-kernel span.is-positive {
    border-color: #9ebaf3;
    background: #e9f0ff;
    color: #0f4af2;
}
.ag-cnn-kernel span.is-negative {
    border-color: #efb7c0;
    background: #fff0f2;
    color: #c52f42;
}
.ag-cnn-inspector dl,
.ag-transformer-inspector dl {
    gap: 0;
    margin: 12px 0;
    border: 1px solid #d2ddf0;
    border-radius: 5px;
    background: #fff;
}
.ag-cnn-inspector dl > div,
.ag-transformer-inspector dl > div {
    min-height: 36px;
    padding: 8px 9px;
    border-bottom: 1px solid #e2e8f4;
}
.ag-cnn-inspector dl > div:last-child,
.ag-transformer-inspector dl > div:last-child {
    border-bottom: 0;
}
.ag-cnn-inspector dt,
.ag-transformer-inspector dt {
    color: var(--lab-muted);
    font-size: 8px;
    text-transform: uppercase;
}
.ag-cnn-inspector dd,
.ag-transformer-inspector dd {
    color: var(--lab-ink);
    font-size: 10px;
    font-weight: 800;
}
.ag-cnn-inspector code,
.ag-transformer-inspector code {
    display: block;
    max-width: 100%;
    padding: 10px;
    border: 0;
    border-radius: 4px;
    background: var(--lab-navy);
    color: #fff;
    font-size: 9px;
    line-height: 1.5;
    white-space: normal;
    overflow-wrap: anywhere;
}
.ag-cnn-channels {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
}
.ag-cnn-channel {
    min-width: 0;
    padding: 6px;
    border: 1px solid #cedaf0;
    border-radius: 5px;
    background: #f8faff;
}
.ag-cnn-channel.is-selected {
    border-color: var(--lab-blue);
    background: #eaf1ff;
    box-shadow: 0 0 0 2px rgba(15, 74, 242, .12);
}
.ag-cnn-channel canvas {
    display: block;
    width: 100%;
    height: auto;
    min-height: 84px;
    aspect-ratio: 1;
    object-fit: contain;
    image-rendering: pixelated;
    background: #071331;
}
.ag-cnn-channel span {
    display: block;
    padding-top: 5px;
    color: #51617d;
    font-size: 8px;
    text-align: center;
}
.ag-cnn-evidence > div {
    gap: 8px;
    padding: 12px;
}
.ag-cnn-evidence > div > div {
    grid-template-columns: minmax(88px, .85fr) minmax(90px, 1.5fr) 42px;
    gap: 8px;
    min-height: 34px;
}
.ag-cnn-evidence i,
.ag-transformer-flow i,
.ag-transformer-output i {
    height: 7px;
    border-radius: 0;
    background: #e1e8f4;
}
.ag-cnn-evidence i b,
.ag-transformer-flow i b,
.ag-transformer-output i b {
    background: var(--lab-blue);
}
.ag-transformer-note {
    grid-template-columns: minmax(160px, .55fr) minmax(0, 1.45fr);
    gap: 12px;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid #b8caf0;
    border-left: 4px solid var(--lab-cyan);
    border-radius: 6px;
    background: #eef8fb;
}
.ag-transformer-note strong {
    color: var(--lab-navy);
    font-size: 12px;
}
.ag-transformer-note span {
    color: #52647d;
    font-size: 10px;
    line-height: 1.5;
}
.ag-transformer-token-ribbon {
    display: flex;
    gap: 7px;
    min-width: 0;
    padding: 10px;
    overflow-x: auto;
    border: 1px solid #c4d2eb;
    border-radius: 6px;
    background: #fff;
    scrollbar-width: thin;
}
.ag-transformer-token-ribbon button {
    flex: 0 0 auto;
    min-width: 68px;
    min-height: 48px;
    border: 1px solid #c3d2ec;
    border-radius: 5px;
    background: #f7f9fd;
    color: var(--lab-ink);
}
.ag-transformer-token-ribbon button.is-selected {
    border-color: var(--lab-blue);
    background: var(--lab-blue);
    color: #fff;
}
.ag-transformer-stage > div {
    min-height: 340px;
    padding: 14px;
    overflow: hidden;
}
.ag-transformer-qkv-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}
.ag-transformer-matrix-card {
    min-width: 0;
    border: 1px solid #cbd8ee;
    border-radius: 5px;
    background: #fff;
    overflow: hidden;
}
.ag-transformer-matrix-card > header {
    min-height: 42px;
    padding: 9px 10px;
    background: #f1f5fc;
}
.ag-transformer-matrix-scroll,
.ag-transformer-panel > div[data-transformer-attention] {
    max-width: 100%;
    overflow: auto;
    scrollbar-width: thin;
}
.ag-transformer-matrix,
.ag-transformer-attention-grid {
    min-width: max-content;
}
.ag-transformer-attention-grid > span,
.ag-transformer-attention-grid > b {
    min-width: 34px;
    min-height: 32px;
    font-size: 8px;
}
.ag-transformer-inspector > strong {
    display: block;
    margin: 4px 0 10px;
    color: var(--lab-blue);
    font-size: 20px;
    line-height: 1.1;
}
.ag-transformer-lower {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(220px, .9fr);
    gap: 12px;
}
.ag-transformer-panel > div[data-transformer-attention],
.ag-transformer-flow {
    min-height: 250px;
    padding: 12px;
}
.ag-transformer-flow {
    display: grid;
    align-content: start;
    gap: 7px;
}
.ag-transformer-flow > div {
    grid-template-columns: minmax(62px, .8fr) minmax(90px, 1.4fr) minmax(62px, .8fr) 34px;
    min-height: 34px;
    padding: 5px 7px;
    border: 1px solid #d5dfef;
    border-radius: 4px;
    background: #f9fbff;
}
.ag-transformer-flow > div.is-strongest {
    border-color: var(--lab-blue);
    background: #edf3ff;
}
.ag-transformer-head-atlas > div {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
}
.ag-transformer-head-atlas button {
    min-width: 0;
    min-height: 94px;
    padding: 11px;
    border: 1px solid #c7d5ed;
    border-radius: 5px;
    background: #f8faff;
    text-align: left;
}
.ag-transformer-head-atlas button.is-selected {
    border-color: var(--lab-blue);
    background: #eaf1ff;
    box-shadow: 0 0 0 2px rgba(15, 74, 242, .12);
}
.ag-transformer-output > div {
    gap: 7px;
    padding: 12px;
}
.ag-transformer-output > div > div {
    grid-template-columns: minmax(80px, .8fr) minmax(120px, 1.5fr) 45px;
    min-height: 32px;
}
.ag-lesson-simulator--lesson-8 .ag-lab-metrics,
.ag-lesson-simulator--lesson-11 .ag-lab-metrics {
    grid-template-columns: 1fr;
}
.ag-lesson-simulator--lesson-8 .ag-lab-metric,
.ag-lesson-simulator--lesson-11 .ag-lab-metric {
    min-height: 58px;
    border-color: #cbd7eb;
    background: #fff;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__footer,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__footer {
    align-items: center;
    min-height: 64px;
    border-top: 1px solid #c9d7ef;
    background: #071331;
    color: #dce6fb;
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__footer a,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__footer a {
    border-color: #5477c9;
    background: #102b69;
    color: #fff;
}

@container ag-simulator (max-width: 900px) {
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__body,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__body {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__controls {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-right: 0;
        border-bottom: 1px solid var(--lab-line);
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-control-intro,
    .ag-lesson-simulator--lesson-8 .ag-cnn-upload,
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-11 .ag-transformer-control-intro,
    .ag-lesson-simulator--lesson-11 .ag-transformer-prompt,
    .ag-lesson-simulator--lesson-11 .ag-lab-button,
    .ag-lesson-simulator--lesson-11 .ag-lab-metrics {
        grid-column: 1 / -1;
    }
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-11 .ag-lab-metrics {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .ag-cnn-pipeline,
    .ag-transformer-pipeline {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .ag-cnn-workspace,
    .ag-transformer-workspace,
    .ag-transformer-lower {
        grid-template-columns: 1fr;
    }
    .ag-cnn-inspector,
    .ag-transformer-inspector {
        display: grid;
        grid-template-columns: minmax(150px, .8fr) minmax(0, 1.2fr);
        gap: 10px 14px;
    }
    .ag-cnn-inspector code,
    .ag-transformer-inspector code {
        grid-column: 1 / -1;
    }
}
@container ag-simulator (max-width: 620px) {
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head {
        min-height: 0;
        padding: 20px;
    }
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__head h4,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__head h4 {
        font-size: 24px;
    }
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__visual,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__visual {
        padding: 14px;
    }
    .ag-cnn-overview,
    .ag-transformer-overview {
        grid-template-columns: 1fr;
    }
    .ag-cnn-pipeline-wrap,
    .ag-transformer-pipeline-wrap {
        grid-template-columns: 1fr;
    }
    .ag-cnn-expand,
    .ag-transformer-expand {
        width: 100%;
    }
    .ag-cnn-channels,
    .ag-transformer-head-atlas > div {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ag-transformer-qkv-grid {
        grid-template-columns: 1fr;
    }
}
@container ag-simulator (max-width: 440px) {
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-11 .ag-lesson-simulator__controls {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-control-intro,
    .ag-lesson-simulator--lesson-8 .ag-cnn-upload,
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-11 .ag-transformer-control-intro,
    .ag-lesson-simulator--lesson-11 .ag-transformer-prompt,
    .ag-lesson-simulator--lesson-11 .ag-lab-button,
    .ag-lesson-simulator--lesson-11 .ag-lab-metrics {
        grid-column: auto;
    }
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-11 .ag-lab-metrics,
    .ag-cnn-pipeline,
    .ag-transformer-pipeline,
    .ag-cnn-channels,
    .ag-transformer-head-atlas > div {
        grid-template-columns: 1fr;
    }
    .ag-cnn-inspector,
    .ag-transformer-inspector {
        display: grid;
        grid-template-columns: 1fr;
    }
    .ag-cnn-focus canvas {
        min-height: 240px;
    }
    .ag-transformer-stage > div {
        min-height: 260px;
        overflow: auto;
    }
    .ag-transformer-note {
        grid-template-columns: 1fr;
    }
}
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__footer a,
.ag-lesson-simulator--lesson-11 .ag-lesson-simulator__footer a {
    display: none;
}

/* Keep the complete token sequence on one line in the full-width lab. */
.ag-lesson-simulator--lesson-11 .ag-transformer-token-cards {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
}

@container ag-simulator (max-width: 760px) {
    .ag-lesson-simulator--lesson-11 .ag-transformer-token-cards {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-auto-flow: row;
        grid-auto-columns: auto;
    }
}

@container ag-simulator (max-width: 480px) {
    .ag-lesson-simulator--lesson-11 .ag-transformer-token-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Real benchmark CNN laboratory */
.ag-real-cnn-proof{margin-top:16px;padding:16px;border:1px solid #cddafb;background:#fff;border-radius:8px;color:#071331}
.ag-real-cnn-proof header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid #e1e8f7}
.ag-real-cnn-proof header span{font-size:12px;font-weight:700;color:#63718c;text-transform:uppercase}
.ag-real-cnn-proof header strong{font-size:17px;color:#0f4af2}
.ag-real-cnn-proof dl{margin:12px 0;display:grid;gap:8px}
.ag-real-cnn-proof dl div{display:flex;justify-content:space-between;gap:12px;font-size:12px}
.ag-real-cnn-proof dt{color:#63718c}.ag-real-cnn-proof dd{margin:0;text-align:right;font-weight:700;overflow-wrap:anywhere}
.ag-real-cnn-proof a{display:inline-flex;color:#0f4af2;font-size:13px;font-weight:700;text-decoration:none}
.ag-real-cnn-studio{min-width:0}
.ag-real-cnn-result{display:grid;grid-template-columns:minmax(180px,240px) minmax(260px,1fr);gap:20px;padding:20px;border:1px solid #cddafb;background:#f7f9fd;border-radius:8px;margin-bottom:18px}
.ag-real-cnn-sample{display:grid;gap:8px;justify-items:center}
.ag-real-cnn-sample canvas{width:100%;max-width:220px;aspect-ratio:1;background:#071331;border:1px solid #27467d;border-radius:8px}
.ag-real-cnn-sample span{font-size:12px;color:#63718c}
.ag-real-cnn-verdict{display:grid;align-content:center;gap:16px;min-width:0}
.ag-real-cnn-verdict>span{justify-self:start;padding:7px 10px;border:1px solid #cddafb;border-radius:999px;background:#fff;color:#63718c;font-size:12px;font-weight:800}
.ag-real-cnn-verdict>span.is-correct{color:#087b59;border-color:#94dfc7;background:#ecfbf5}
.ag-real-cnn-verdict>span.is-error{color:#b82e3a;border-color:#f1b8bd;background:#fff2f3}
.ag-real-cnn-verdict dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0}
.ag-real-cnn-verdict dl div{padding:14px;border:1px solid #d9e3f5;background:#fff;border-radius:8px;min-width:0}
.ag-real-cnn-verdict dt{font-size:11px;color:#63718c;text-transform:uppercase;font-weight:700}
.ag-real-cnn-verdict dd{margin:7px 0 0;color:#071331;font-size:16px;font-weight:800;overflow-wrap:anywhere}
.ag-real-cnn-studio .ag-cnn-evidence [data-cnn-evidence] div.is-predicted{background:#eef3ff;border-color:#0f4af2}
.ag-real-cnn-studio .ag-cnn-evidence [data-cnn-evidence] div.is-predicted strong{color:#0f4af2}
.ag-real-cnn-studio .ag-cnn-pipeline{scrollbar-width:thin}
.ag-real-cnn-studio .ag-cnn-pipeline button{min-width:126px;white-space:normal;line-height:1.25}
.ag-lesson-lab.is-cnn-loading .ag-real-cnn-studio{opacity:.62;pointer-events:none}
@media (max-width:900px){.ag-real-cnn-result{grid-template-columns:1fr}.ag-real-cnn-verdict dl{grid-template-columns:1fr}.ag-real-cnn-sample canvas{max-width:260px}}
@media (max-width:620px){.ag-real-cnn-result{padding:14px;gap:14px}.ag-real-cnn-proof dl div{display:grid;gap:3px}.ag-real-cnn-proof dd{text-align:left}.ag-real-cnn-studio .ag-cnn-pipeline button{min-width:112px}.ag-real-cnn-sample canvas{max-width:220px}}

@container ag-simulator (max-width: 760px) {
    .ag-lesson-simulator--lesson-3 .ag-lesson-simulator__controls {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 18px;
    }
    .ag-backprop-givens { grid-template-columns: 1fr; }
    .ag-backprop-equations { grid-template-columns: 1fr; }
    .ag-backprop-equation > span,
    .ag-backprop-equation > small { min-height: 0; }
    .ag-backprop-derivatives { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-backprop-derivatives > i { display: none; }
    .ag-backprop-update-rule { grid-template-columns: 1fr; }
    .ag-backprop-update-rule strong { text-align: left; }
    .ag-backprop-loss-change { grid-template-columns: 1fr; }
    .ag-backprop-loss-change > small { white-space: normal; }
}

@container ag-simulator (max-width: 480px) {
    .ag-lesson-simulator--lesson-3 .ag-lesson-simulator__controls { grid-template-columns: 1fr; }
    .ag-lesson-simulator--lesson-3 .ag-lab-actions { display: grid; grid-template-columns: 1fr; }
    .ag-lesson-simulator--lesson-3 .ag-lab-actions .ag-lab-button { width: 100%; min-width: 0; white-space: normal; }
    .ag-lesson-simulator--lesson-3 .ag-lesson-simulator__visual { padding: 12px; }
    .ag-backprop-givens,
    .ag-backprop-stage { padding: 14px; }
    .ag-backprop-givens dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-backprop-derivatives { grid-template-columns: 1fr; }
    .ag-backprop-after { grid-template-columns: 1fr; }
    .ag-backprop-chain-rule code,
    .ag-backprop-update-rule code,
    .ag-backprop-update-rule strong {
        display: block;
        max-width: 100%;
        font-size: 14px;
        line-height: 1.5;
        overflow-wrap: anywhere;
        white-space: normal;
    }
}

.ag-lesson-simulator--lesson-3 .ag-lesson-simulator__footer a { display: none; }

/* Lesson 4: exact mini-batch, iteration, and epoch laboratory */
.ag-lesson-simulator--lesson-4 .ag-lesson-simulator__body {
    grid-template-columns: minmax(250px, 27%) minmax(0, 1fr);
}

.ag-lesson-simulator--lesson-4 .ag-lesson-simulator__visual {
    padding: 20px;
}

.ag-lesson-simulator--lesson-4 .ag-lesson-simulator__footer a {
    display: none;
}

.ag-training-actions .ag-lab-button {
    flex-basis: calc(50% - 4px);
    min-height: 48px;
}

.ag-training-actions .ag-lab-button:first-child,
.ag-training-actions .ag-lab-button:last-child {
    flex-basis: 100%;
}

.ag-training-lab {
    display: grid;
    gap: 16px;
    width: 100%;
    color: #071331;
}

.ag-training-clock {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr) auto);
    align-items: stretch;
    gap: 8px;
}

.ag-training-clock article {
    min-width: 0;
    padding: 14px;
    border: 1px solid #cbd9f2;
    border-top: 3px solid #0f4af2;
    border-radius: 7px;
    background: #fff;
}

.ag-training-clock article span,
.ag-training-charts header span,
.ag-training-batch-detail header span,
.ag-training-calculation header span,
.ag-training-discoveries header span,
.ag-training-progress header > div > span {
    display: block;
    margin-bottom: 5px;
    color: #63718c;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.ag-training-clock article strong {
    display: block;
    margin-bottom: 4px;
    color: #0f4af2;
    font-size: 20px;
    font-weight: 850;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}

.ag-training-clock article small {
    display: block;
    color: #42516d;
    font-size: 11px;
    line-height: 1.35;
}

.ag-training-clock > i {
    align-self: center;
    color: #0f4af2;
    font-size: 18px;
    font-style: normal;
    font-weight: 800;
}

.ag-training-progress,
.ag-training-batch-detail,
.ag-training-calculation,
.ag-training-discoveries,
.ag-training-charts > section {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #cbd9f2;
    border-radius: 7px;
    background: #fff;
}

.ag-training-progress > header,
.ag-training-calculation > header,
.ag-training-discoveries > header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: 15px 17px;
    border-bottom: 1px solid #d9e3f5;
    background: #f8faff;
}

.ag-training-progress h5,
.ag-training-charts h5,
.ag-training-batch-detail h5,
.ag-training-calculation h5,
.ag-training-discoveries h5 {
    margin: 0;
    color: #071331;
    font-size: 15px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: 0;
}

.ag-training-progress h5 b {
    color: #0f4af2;
    font-variant-numeric: tabular-nums;
}

.ag-training-progress dl {
    display: grid;
    grid-template-columns: repeat(3, minmax(92px, 1fr));
    gap: 7px;
    margin: 0;
}

.ag-training-progress dl div {
    padding: 8px 10px;
    border: 1px solid #d7e2f5;
    border-radius: 5px;
    background: #fff;
}

.ag-training-progress dt {
    margin-bottom: 3px;
    color: #63718c;
    font-size: 9px;
    font-weight: 750;
    line-height: 1.2;
    text-transform: uppercase;
}

.ag-training-progress dd {
    margin: 0;
    color: #071331;
    font-size: 14px;
    font-weight: 850;
    font-variant-numeric: tabular-nums;
}

.ag-training-batch-rail {
    display: grid;
    grid-auto-columns: 20px;
    grid-auto-flow: column;
    gap: 4px;
    min-height: 54px;
    padding: 14px 16px 12px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
}

.ag-training-batch-rail i {
    position: relative;
    display: block;
    width: 20px;
    height: 24px;
    border: 1px solid #bfd0ef;
    border-radius: 3px;
    background: #edf3fd;
    transition: background .16s ease, border-color .16s ease, transform .16s ease;
}

.ag-training-batch-rail i span {
    position: absolute;
    top: 29px;
    left: 50%;
    color: #71809a;
    font-size: 8px;
    font-style: normal;
    line-height: 1;
    transform: translateX(-50%);
}

.ag-training-batch-rail i.is-complete {
    border-color: #0f4af2;
    background: #0f4af2;
}

.ag-training-batch-rail i.is-current {
    border-color: #12a879;
    background: #d9f6ed;
    box-shadow: 0 0 0 3px rgba(18,168,121,.14);
    transform: translateY(-2px);
}

.ag-training-charts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.ag-training-charts > section > header,
.ag-training-batch-detail > header {
    padding: 14px 16px 0;
}

.ag-training-canvas {
    display: block;
    width: 100%;
    height: 300px;
    border: 0;
    background: #fff;
}

.ag-training-samples {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    padding: 14px 16px 16px;
}

.ag-training-samples > span,
.ag-training-samples > em {
    grid-column: 1 / -1;
    color: #63718c;
    font-size: 12px;
    font-style: normal;
}

.ag-training-samples div {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 8px;
    min-width: 0;
    padding: 9px;
    border: 1px solid #d5e0f3;
    border-radius: 5px;
    background: #f8faff;
    font-variant-numeric: tabular-nums;
}

.ag-training-samples div b { color: #0f4af2; font-size: 11px; }
.ag-training-samples div span,
.ag-training-samples div small { color: #42516d; font-size: 10px; }

.ag-training-calculation {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ag-training-calculation > header {
    grid-column: 1 / -1;
}

.ag-training-calculation > header b {
    color: #0f4af2;
    font-size: 11px;
    font-weight: 800;
    white-space: nowrap;
}

.ag-training-equation {
    display: grid;
    align-content: start;
    gap: 7px;
    min-width: 0;
    min-height: 124px;
    padding: 15px;
    border-right: 1px solid #d9e3f5;
}

.ag-training-equation:last-child { border-right: 0; }

.ag-training-equation.is-plan {
    grid-column: 1 / -1;
    grid-template-columns: minmax(150px, .9fr) minmax(220px, 1.3fr) auto auto;
    align-items: center;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid #d9e3f5;
    background: #f8faff;
}

.ag-training-equation span {
    color: #63718c;
    font-size: 10px;
    font-weight: 800;
    line-height: 1.25;
    text-transform: uppercase;
}

.ag-training-equation code {
    overflow-wrap: anywhere;
    color: #071331;
    font: 750 14px/1.5 Inter, Arial, sans-serif;
}

.ag-training-equation strong {
    overflow-wrap: anywhere;
    color: #0f4af2;
    font-size: 14px;
    font-weight: 850;
    line-height: 1.35;
    font-variant-numeric: tabular-nums;
}

.ag-training-equation small {
    overflow-wrap: anywhere;
    color: #42516d;
    font-size: 11px;
    line-height: 1.4;
    font-variant-numeric: tabular-nums;
}

.ag-training-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    min-height: 112px;
    padding: 20px;
    color: #63718c;
    text-align: center;
}

.ag-training-empty strong { color: #071331; font-size: 14px; }
.ag-training-empty span { font-size: 12px; }

.ag-training-discoveries > header > strong {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 5px 9px;
    border-radius: 4px;
    background: #0f4af2;
    color: #fff;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.ag-training-discoveries > div {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    padding: 14px 16px 16px;
}

.ag-training-discoveries article {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    min-width: 0;
    padding: 11px;
    border: 1px solid #d5e0f3;
    border-radius: 6px;
    background: #f8faff;
}

.ag-training-discoveries article > b {
    flex: 0 0 24px;
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #dfe8f8;
    color: #71809a;
    font-size: 11px;
}

.ag-training-discoveries article.is-unlocked {
    border-color: #a8decf;
    background: #edfaf6;
}

.ag-training-discoveries article.is-unlocked > b {
    background: #12a879;
    color: #fff;
}

.ag-training-discoveries article span { min-width: 0; }
.ag-training-discoveries article strong { display: block; margin-bottom: 3px; color: #071331; font-size: 12px; line-height: 1.35; }
.ag-training-discoveries article small { display: block; color: #63718c; font-size: 10px; line-height: 1.45; }

@container ag-simulator (max-width: 900px) {
    .ag-lesson-simulator--lesson-4 .ag-lesson-simulator__body {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-4 .ag-lesson-simulator__controls {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-right: 0;
        border-bottom: 1px solid #d9e3f5;
    }
    .ag-lesson-simulator--lesson-4 .ag-training-actions,
    .ag-lesson-simulator--lesson-4 .ag-lab-metrics { grid-column: 1 / -1; }
    .ag-training-clock { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .ag-training-clock > i { display: none; }
    .ag-training-charts { grid-template-columns: 1fr; }
}

@container ag-simulator (max-width: 620px) {
    .ag-lesson-simulator--lesson-4 .ag-lesson-simulator__visual { padding: 12px; }
    .ag-lesson-simulator--lesson-4 .ag-lesson-simulator__controls { grid-template-columns: 1fr; padding: 16px; }
    .ag-lesson-simulator--lesson-4 .ag-training-actions,
    .ag-lesson-simulator--lesson-4 .ag-lab-metrics { grid-column: auto; }
    .ag-training-clock { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-training-clock article { padding: 11px; }
    .ag-training-progress > header { display: grid; }
    .ag-training-progress dl { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .ag-training-progress dl div { padding: 7px; }
    .ag-training-samples { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-training-calculation { grid-template-columns: 1fr; }
    .ag-training-calculation > header,
    .ag-training-equation.is-plan { grid-column: 1; }
    .ag-training-equation.is-plan { display: grid; grid-template-columns: 1fr; }
    .ag-training-equation { border-right: 0; border-bottom: 1px solid #d9e3f5; }
    .ag-training-discoveries > div { grid-template-columns: 1fr; }
    .ag-training-canvas { height: 270px; }
}

/* Lesson 5: exact ROC, AUC, and threshold evaluation laboratory */
.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__body {
    grid-template-columns: minmax(255px, .72fr) minmax(0, 2.28fr);
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__controls {
    align-content: start;
    gap: 16px;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__visual {
    min-width: 0;
    padding: 18px;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__footer a {
    display: none;
}

.ag-eval-control-intro {
    display: grid;
    gap: 3px;
    padding: 13px 14px;
    border: 1px solid #c7d6f1;
    border-left: 4px solid #0f4af2;
    border-radius: 6px;
    background: #fff;
}

.ag-eval-control-intro span,
.ag-eval-control-intro small {
    color: #63718c;
    font-size: 10px;
    font-weight: 650;
}

.ag-eval-control-intro strong {
    color: #071331;
    font-size: 22px;
    line-height: 1.1;
}

.ag-eval-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
}

.ag-eval-actions .ag-lab-button {
    width: 100%;
    min-height: 40px;
    padding: 9px 11px;
    font-size: 12px;
}

.ag-eval-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ag-eval-metrics .ag-lab-metric:first-child {
    border-color: #0f4af2;
    background: #0f4af2;
}

.ag-eval-metrics .ag-lab-metric:first-child span,
.ag-eval-metrics .ag-lab-metric:first-child strong {
    color: #fff;
}

.ag-eval-legend {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
    padding-top: 12px;
    border-top: 1px solid #d9e3f5;
}

.ag-eval-legend span {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    color: #31415e;
    font-size: 9px;
    font-weight: 700;
}

.ag-eval-legend i {
    flex: 0 0 9px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
}

.ag-eval-legend .is-tp { background: #12a879; }
.ag-eval-legend .is-fn { background: #e84b55; }
.ag-eval-legend .is-fp { background: #e7a31a; }
.ag-eval-legend .is-tn { background: #63718c; }

.ag-eval-lab {
    display: grid;
    gap: 14px;
    min-width: 0;
}

.ag-eval-hero {
    display: grid;
    grid-template-columns: minmax(190px, .62fr) minmax(0, 1.38fr);
    align-items: center;
    gap: 22px;
    padding: 18px 20px;
    border: 1px solid #0f4af2;
    border-radius: 6px;
    background: #071331;
    color: #fff;
}

.ag-eval-hero > div {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 2px 14px;
}

.ag-eval-hero > div span {
    grid-column: 1 / -1;
    color: #b9cbff;
    font-size: 10px;
    font-weight: 750;
    text-transform: uppercase;
}

.ag-eval-hero > div strong {
    color: #fff;
    font-size: 48px;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.ag-eval-hero > div small {
    color: #c8d5ef;
    font-size: 10px;
    line-height: 1.45;
}

.ag-eval-hero p {
    margin: 0;
    padding-left: 20px;
    border-left: 1px solid rgba(255,255,255,.22);
    color: #dfe7f7;
    font-size: 12px;
    line-height: 1.55;
}

.ag-eval-hero p b {
    display: block;
    margin-bottom: 4px;
    color: #fff;
    font-size: 12px;
}

.ag-eval-main-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
    gap: 14px;
    min-width: 0;
}

.ag-eval-panel {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #c7d6f1;
    border-radius: 6px;
    background: #fff;
}

.ag-eval-panel > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 66px;
    padding: 12px 15px;
    border-bottom: 1px solid #d9e3f5;
    background: #f7f9fd;
}

.ag-eval-panel > header span {
    display: block;
    margin-bottom: 2px;
    color: #63718c;
    font-size: 9px;
    font-weight: 750;
    text-transform: uppercase;
}

.ag-eval-panel > header h5 {
    margin: 0;
    color: #071331;
    font-size: 14px;
    line-height: 1.25;
}

.ag-eval-panel > header > b {
    flex: 0 0 auto;
    padding: 7px 10px;
    border-radius: 4px;
    background: #e8efff;
    color: #0f4af2;
    font-size: 10px;
    white-space: nowrap;
}

.ag-eval-panel > header em {
    font-size: 15px;
    font-style: normal;
}

.ag-eval-roc canvas {
    display: block;
    width: 100%;
    height: 390px;
}

.ag-eval-confusion {
    display: grid;
    grid-template-columns: minmax(86px, .85fr) repeat(2, minmax(86px, 1fr));
    gap: 7px;
    padding: 14px;
}

.ag-eval-confusion-corner,
.ag-eval-confusion-heading {
    display: grid;
    place-items: center;
    min-height: 45px;
    padding: 6px;
    color: #31415e;
    font-size: 9px;
    font-weight: 750;
    line-height: 1.3;
    text-align: center;
}

.ag-eval-confusion-corner {
    border-radius: 4px;
    background: #071331;
    color: #fff;
}

.ag-eval-confusion-heading small {
    color: #71809a;
    font-size: 8px;
}

.ag-eval-confusion article {
    display: grid;
    place-items: center;
    min-height: 112px;
    padding: 10px 6px;
    border: 1px solid currentColor;
    border-radius: 5px;
    text-align: center;
}

.ag-eval-confusion article span,
.ag-eval-confusion article small {
    font-size: 8px;
    font-weight: 750;
    line-height: 1.25;
}

.ag-eval-confusion article strong {
    margin: 5px 0;
    color: currentColor;
    font-size: 34px;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.ag-eval-confusion .is-tp { background: #e9f8f3; color: #087a5b; }
.ag-eval-confusion .is-fn { background: #fff0f1; color: #be2f39; }
.ag-eval-confusion .is-fp { background: #fff8e8; color: #9a6500; }
.ag-eval-confusion .is-tn { background: #eef2f8; color: #3c4b66; }

.ag-eval-equations {
    display: grid;
    gap: 7px;
    padding: 0 14px 14px;
}

.ag-eval-equations p {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin: 0;
    padding: 8px 10px;
    border: 1px solid #d9e3f5;
    border-radius: 4px;
    color: #63718c;
    font-size: 9px;
}

.ag-eval-equations strong {
    color: #071331;
    font-size: 10px;
    font-variant-numeric: tabular-nums;
}

.ag-eval-score-panel > header p {
    max-width: 470px;
    margin: 0;
    color: #63718c;
    font-size: 10px;
    line-height: 1.45;
    text-align: right;
}

.ag-eval-score-axis {
    position: relative;
    height: 176px;
    margin: 18px 30px 24px 122px;
    border: 1px solid #d9e3f5;
    background: repeating-linear-gradient(to right, #fff 0, #fff calc(10% - 1px), #edf2fa calc(10% - 1px), #edf2fa 10%);
}

.ag-eval-score-axis::before {
    content: '';
    position: absolute;
    z-index: 0;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background: #d9e3f5;
}

.ag-eval-score-label {
    position: absolute;
    right: calc(100% + 12px);
    width: 104px;
    color: #31415e;
    font-size: 10px;
    font-weight: 750;
    text-align: right;
}

.ag-eval-score-label.is-positive { top: 31px; }
.ag-eval-score-label.is-negative { top: 112px; }

.ag-eval-score-points {
    position: absolute;
    inset: 0 10px;
}

.ag-eval-score-points i {
    position: absolute;
    z-index: 2;
    width: 15px;
    height: 15px;
    transform: translate(-50%, -50%);
    border: 2px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 1px currentColor;
    cursor: help;
}

.ag-eval-score-points i span {
    position: absolute;
    left: 50%;
    top: 19px;
    transform: translateX(-50%);
    color: #63718c;
    font-size: 7px;
    font-style: normal;
    white-space: nowrap;
}

.ag-eval-score-points .is-tp { background: #12a879; color: #087a5b; }
.ag-eval-score-points .is-fn { background: #e84b55; color: #be2f39; }
.ag-eval-score-points .is-fp { background: #e7a31a; color: #9a6500; }
.ag-eval-score-points .is-tn { background: #63718c; color: #3c4b66; }

.ag-eval-threshold-line {
    position: absolute;
    z-index: 1;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e84b55;
}

.ag-eval-threshold-line span {
    position: absolute;
    left: 50%;
    top: -11px;
    transform: translate(-50%, -100%);
    padding: 5px 7px;
    border-radius: 4px;
    background: #e84b55;
    color: #fff;
    font-size: 8px;
    font-weight: 750;
    white-space: nowrap;
}

.ag-eval-score-ticks {
    position: absolute;
    left: 0;
    right: 0;
    bottom: -20px;
    display: flex;
    justify-content: space-between;
    color: #63718c;
    font-size: 8px;
    font-weight: 650;
}

.ag-eval-proof > div {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ag-eval-proof article {
    min-width: 0;
    padding: 14px 16px 16px;
    border-right: 1px solid #d9e3f5;
}

.ag-eval-proof article:last-child { border-right: 0; }

.ag-eval-proof article span,
.ag-eval-proof article small {
    display: block;
    color: #63718c;
    font-size: 9px;
    line-height: 1.45;
}

.ag-eval-proof article strong {
    display: block;
    margin: 7px 0;
    color: #071331;
    font-size: 12px;
    line-height: 1.45;
    font-variant-numeric: tabular-nums;
}

.ag-eval-proof article b {
    color: #0f4af2;
}

@container ag-simulator (max-width: 980px) {
    .ag-lesson-simulator--lesson-5 .ag-lesson-simulator__body { grid-template-columns: 1fr; }
    .ag-lesson-simulator--lesson-5 .ag-lesson-simulator__controls {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-right: 0;
        border-bottom: 1px solid #d9e3f5;
    }
    .ag-eval-actions,
    .ag-eval-metrics,
    .ag-eval-legend { grid-column: 1 / -1; }
    .ag-eval-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .ag-eval-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@container ag-simulator (max-width: 760px) {
    .ag-eval-hero { grid-template-columns: 1fr; gap: 12px; }
    .ag-eval-hero p { padding: 12px 0 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.22); }
    .ag-eval-main-grid { grid-template-columns: 1fr; }
    .ag-eval-roc canvas { height: 360px; }
    .ag-eval-score-panel > header { display: grid; }
    .ag-eval-score-panel > header p { max-width: none; text-align: left; }
    .ag-eval-proof > div { grid-template-columns: 1fr; }
    .ag-eval-proof article { border-right: 0; border-bottom: 1px solid #d9e3f5; }
    .ag-eval-proof article:last-child { border-bottom: 0; }
}

@container ag-simulator (max-width: 560px) {
    .ag-lesson-simulator--lesson-5 .ag-lesson-simulator__controls { grid-template-columns: 1fr; padding: 16px; }
    .ag-lesson-simulator--lesson-5 .ag-lesson-simulator__visual { padding: 10px; }
    .ag-eval-actions,
    .ag-eval-metrics,
    .ag-eval-legend { grid-column: auto; }
    .ag-eval-actions { grid-template-columns: 1fr; }
    .ag-eval-hero { grid-template-columns: 1fr; gap: 12px; padding: 16px; }
    .ag-eval-hero p { padding: 12px 0 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.22); }
    .ag-eval-hero > div strong { font-size: 42px; }
    .ag-eval-roc canvas { height: 330px; }
    .ag-eval-confusion { grid-template-columns: 72px repeat(2, minmax(70px, 1fr)); gap: 5px; padding: 10px; }
    .ag-eval-confusion article { min-height: 92px; }
    .ag-eval-confusion article strong { font-size: 28px; }
    .ag-eval-equations { padding: 0 10px 10px; }
    .ag-eval-equations p { display: grid; }
    .ag-eval-score-axis { margin: 18px 12px 24px 90px; }
    .ag-eval-score-label { right: calc(100% + 7px); width: 75px; font-size: 8px; }
    .ag-eval-score-points i { width: 12px; height: 12px; }
    .ag-eval-score-points i span { display: none; }
}

/* Lesson 5 real UCI benchmark presentation */
.ag-lesson-simulator--lesson-5 {
    --eval-navy: #071331;
    --eval-blue: #0f4af2;
    --eval-cyan: #22b6e8;
    --eval-green: #12a879;
    --eval-coral: #ef5b62;
    --eval-ink: #071331;
    --eval-muted: #5d6f8d;
    --eval-line: #c8d8f3;
}

.ag-lesson-simulator--lesson-5,
.ag-lesson-simulator--lesson-5 * {
    box-sizing: border-box;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__body {
    grid-template-columns: minmax(280px, 310px) minmax(0, 1fr);
    background: #f5f8fd;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__controls {
    border-right-color: var(--eval-line);
    background: #f7f9fd;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__visual {
    padding: 22px;
    background: #fbfdff;
}

.ag-eval-control-intro {
    border-color: #b8ccf0;
    border-left-color: var(--eval-cyan);
    box-shadow: 0 8px 24px rgba(7, 19, 49, .06);
}

.ag-eval-provenance {
    display: grid;
    gap: 6px;
    padding: 14px;
    border: 1px solid var(--eval-line);
    border-radius: 7px;
    background: #fff;
}

.ag-eval-provenance strong {
    color: var(--eval-ink);
    font-size: 12px;
}

.ag-eval-provenance span {
    position: relative;
    padding-left: 14px;
    color: #344765;
    font-size: 10px;
    font-weight: 700;
}

.ag-eval-provenance span::before {
    content: '';
    position: absolute;
    left: 0;
    top: .43em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--eval-cyan);
}

.ag-eval-provenance small {
    margin-top: 4px;
    padding-top: 8px;
    border-top: 1px solid #e3eaf6;
    color: var(--eval-muted);
    font-size: 9px;
    line-height: 1.45;
}

.ag-eval-actions .ag-lab-button {
    border-color: #9db7ee;
    background: #fff;
    color: var(--eval-blue);
}

.ag-eval-actions .ag-lab-button.is-primary,
.ag-eval-actions .ag-lab-button:hover {
    border-color: var(--eval-blue);
    background: var(--eval-blue);
    color: #fff;
}

.ag-eval-lab {
    gap: 16px;
}

.ag-eval-hero {
    grid-template-columns: minmax(210px, .68fr) minmax(0, 1.32fr);
    border-color: #173d99;
    border-left: 5px solid var(--eval-cyan);
    border-radius: 8px;
    box-shadow: 0 14px 34px rgba(7, 19, 49, .13);
}

.ag-eval-benchmark {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.ag-eval-benchmark article {
    display: grid;
    gap: 4px;
    min-width: 0;
    min-height: 92px;
    padding: 14px;
    border: 1px solid var(--eval-line);
    border-top: 3px solid var(--eval-blue);
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 8px 22px rgba(7, 19, 49, .05);
}

.ag-eval-benchmark article:nth-child(2) { border-top-color: var(--eval-cyan); }
.ag-eval-benchmark article:nth-child(3) { border-top-color: #466eef; }
.ag-eval-benchmark article:nth-child(4) { border-top-color: var(--eval-green); }

.ag-eval-benchmark span {
    color: var(--eval-muted);
    font-size: 9px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-eval-benchmark strong {
    color: var(--eval-ink);
    font-size: 14px;
    line-height: 1.25;
}

.ag-eval-benchmark small {
    color: var(--eval-muted);
    font-size: 9px;
    line-height: 1.35;
}

.ag-eval-main-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(340px, .75fr);
    gap: 16px;
}

.ag-eval-panel {
    border-color: var(--eval-line);
    border-radius: 8px;
    box-shadow: 0 10px 28px rgba(7, 19, 49, .055);
}

.ag-eval-panel > header {
    border-bottom-color: var(--eval-line);
    background: #f3f7ff;
}

.ag-eval-roc canvas {
    width: 100%;
    height: 500px;
    background: #fff;
}

.ag-eval-confusion article {
    min-height: 120px;
}

.ag-eval-confusion .is-tp { background: #eafaf4; color: #087a5b; }
.ag-eval-confusion .is-fn { background: #fff1f2; color: #c23843; }
.ag-eval-confusion .is-fp { background: #fff8e8; color: #9a6500; }
.ag-eval-confusion .is-tn { background: #edf3ff; color: #173f91; }

.ag-eval-score-axis {
    height: 214px;
    margin-top: 24px;
    margin-bottom: 30px;
    border-color: var(--eval-line);
    background: repeating-linear-gradient(to right, #fff 0, #fff calc(10% - 1px), #e7eefb calc(10% - 1px), #e7eefb 10%);
}

.ag-eval-score-label {
    color: var(--eval-ink);
    font-size: 10px;
}

.ag-eval-score-label small {
    display: block;
    margin-top: 3px;
    color: var(--eval-muted);
    font-size: 8px;
}

.ag-eval-score-label.is-positive { top: 42px; }
.ag-eval-score-label.is-negative { top: 142px; }

.ag-eval-score-points i {
    width: 10px;
    height: 10px;
    border-width: 1px;
    opacity: .82;
    transition: opacity .16s ease, transform .16s ease;
}

.ag-eval-score-points i:hover,
.ag-eval-score-points i:focus-visible {
    z-index: 5;
    opacity: 1;
    outline: 2px solid #071331;
    outline-offset: 2px;
    transform: translate(-50%, -50%) scale(1.55);
}

.ag-eval-score-points .is-tn { background: #315da8; color: #173f91; }
.ag-eval-threshold-line { background: var(--eval-coral); }
.ag-eval-threshold-line span { background: var(--eval-coral); }

@container ag-simulator (max-width: 1120px) {
    .ag-eval-main-grid { grid-template-columns: 1fr; }
    .ag-eval-confusion-panel { max-width: none; }
    .ag-eval-confusion { grid-template-columns: minmax(110px, .8fr) repeat(2, minmax(120px, 1fr)); }
}

@container ag-simulator (max-width: 820px) {
    .ag-eval-benchmark { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-eval-roc canvas { height: 420px; }
}

@container ag-simulator (max-width: 560px) {
    .ag-eval-benchmark { grid-template-columns: 1fr; }
    .ag-eval-benchmark article { min-height: 0; }
    .ag-eval-roc canvas { height: 350px; }
    .ag-eval-score-axis { height: 190px; margin-left: 82px; }
    .ag-eval-score-label.is-positive { top: 34px; }
    .ag-eval-score-label.is-negative { top: 122px; }
}

/* Lesson 5 compact dual-example workspace */
.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__head {
    min-height: 0;
    padding: 12px 18px;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__head h4 {
    margin: 2px 0 3px;
    font-size: clamp(24px, 2.1vw, 34px);
    line-height: 1.05;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__head p {
    max-width: 980px;
    font-size: 11px;
    line-height: 1.4;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__body {
    grid-template-columns: minmax(225px, 250px) minmax(0, 1fr);
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__controls {
    gap: 9px;
    padding: 12px;
}

.ag-lesson-simulator--lesson-5 .ag-lesson-simulator__visual {
    padding: 11px;
}

.ag-lesson-simulator--lesson-5 .ag-lab-field {
    gap: 5px;
}

.ag-lesson-simulator--lesson-5 .ag-lab-field > span {
    font-size: 9px;
}

.ag-lesson-simulator--lesson-5 .ag-lab-field select {
    min-height: 36px;
    padding-top: 6px;
    padding-bottom: 6px;
    font-size: 11px;
}

.ag-eval-control-intro {
    gap: 2px;
    padding: 9px 10px;
}

.ag-eval-control-intro strong { font-size: 16px; }
.ag-eval-control-intro span,
.ag-eval-control-intro small { font-size: 8px; }

.ag-eval-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
}

.ag-eval-actions .ag-lab-button {
    min-height: 34px;
    padding: 6px 4px;
    font-size: 9px;
}

.ag-eval-metrics .ag-lab-metric {
    min-height: 58px;
    padding: 8px;
}

.ag-eval-metrics .ag-lab-metric span { font-size: 8px; }
.ag-eval-metrics .ag-lab-metric strong { font-size: 15px; }

.ag-eval-legend {
    gap: 4px 7px;
    padding-top: 7px;
}

.ag-eval-legend span { font-size: 8px; }

.ag-eval-provenance {
    gap: 3px;
    padding: 8px 9px;
}

.ag-eval-provenance strong { font-size: 10px; }
.ag-eval-provenance span { font-size: 8px; }
.ag-eval-provenance small { padding-top: 5px; font-size: 7px; }

.ag-eval-lab { gap: 8px; }

.ag-eval-hero {
    grid-template-columns: minmax(180px, .56fr) minmax(0, 1.44fr);
    gap: 12px;
    padding: 9px 12px;
}

.ag-eval-hero > div { gap: 1px 9px; }
.ag-eval-hero > div strong { font-size: 34px; }
.ag-eval-hero > div span,
.ag-eval-hero > div small { font-size: 8px; }
.ag-eval-hero p { padding-left: 12px; font-size: 9px; line-height: 1.38; }
.ag-eval-hero p b { margin-bottom: 2px; font-size: 9px; }

.ag-eval-benchmark { gap: 6px; }

.ag-eval-benchmark article {
    min-height: 58px;
    gap: 2px;
    padding: 7px 9px;
}

.ag-eval-benchmark span,
.ag-eval-benchmark small { font-size: 7px; }
.ag-eval-benchmark strong { font-size: 10px; }

.ag-eval-main-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, .72fr);
    gap: 8px;
}

.ag-eval-panel > header {
    min-height: 46px;
    padding: 7px 10px;
}

.ag-eval-panel > header span { font-size: 7px; }
.ag-eval-panel > header h5 { font-size: 11px; }
.ag-eval-panel > header > b { padding: 5px 7px; font-size: 8px; }
.ag-eval-panel > header em { font-size: 12px; }

.ag-eval-roc canvas { height: 310px; }

.ag-eval-confusion {
    grid-template-columns: minmax(70px, .82fr) repeat(2, minmax(74px, 1fr));
    gap: 4px;
    padding: 8px;
}

.ag-eval-confusion-corner,
.ag-eval-confusion-heading {
    min-height: 32px;
    padding: 3px;
    font-size: 7px;
}

.ag-eval-confusion article {
    min-height: 78px;
    padding: 5px 3px;
}

.ag-eval-confusion article span,
.ag-eval-confusion article small { font-size: 7px; }
.ag-eval-confusion article strong { margin: 2px 0; font-size: 24px; }

.ag-eval-equations {
    gap: 4px;
    padding: 0 8px 8px;
}

.ag-eval-equations p {
    padding: 5px 7px;
    font-size: 7px;
}
.ag-eval-equations strong { font-size: 8px; }

.ag-eval-score-panel > header p { max-width: 520px; font-size: 8px; }
.ag-eval-score-axis {
    height: 120px;
    margin: 14px 22px 22px 100px;
}
.ag-eval-score-label { width: 82px; font-size: 8px; }
.ag-eval-score-label.is-positive { top: 21px; }
.ag-eval-score-label.is-negative { top: 75px; }
.ag-eval-score-points i { width: 8px; height: 8px; }

.ag-eval-proof article { padding: 9px 11px; }
.ag-eval-proof article span,
.ag-eval-proof article small { font-size: 7px; }
.ag-eval-proof article strong { margin: 4px 0; font-size: 9px; }

@container ag-simulator (max-width: 850px) {
    .ag-eval-main-grid { grid-template-columns: 1fr; }
    .ag-eval-roc canvas { height: 340px; }
}

@container ag-simulator (max-width: 560px) {
    .ag-lesson-simulator--lesson-5 .ag-lesson-simulator__head { padding: 12px 14px; }
    .ag-eval-actions { grid-template-columns: 1fr; }
    .ag-eval-hero { grid-template-columns: 1fr; }
    .ag-eval-roc canvas { height: 300px; }
}

/* Lesson 8: responsive real-CNN benchmark and exact convolution geometry */
.ag-lesson-simulator--lesson-8,
.ag-lesson-simulator--lesson-8 * {
    box-sizing: border-box;
}

.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__body {
    grid-template-columns: minmax(260px, 300px) minmax(0, 1fr);
    align-items: start;
    min-width: 0;
}

.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__visual,
.ag-lesson-simulator--lesson-8 .ag-cnn-studio,
.ag-lesson-simulator--lesson-8 .ag-cnn-workspace,
.ag-lesson-simulator--lesson-8 .ag-cnn-focus,
.ag-lesson-simulator--lesson-8 .ag-cnn-inspector {
    min-width: 0;
    max-width: 100%;
}

.ag-lesson-simulator--lesson-8 .ag-lesson-simulator__visual {
    overflow: hidden;
}

.ag-cnn-geometry-controls {
    display: grid;
    gap: 11px;
    padding: 14px;
    border: 1px solid #b8caf0;
    border-radius: 6px;
    background: #fff;
}

.ag-cnn-geometry-controls > header {
    display: grid;
    gap: 4px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dbe4f4;
}

.ag-cnn-geometry-controls > header strong {
    color: #071331;
    font-size: 13px;
}

.ag-cnn-geometry-controls > header span {
    color: #63718c;
    font-size: 10px;
    line-height: 1.45;
}

.ag-cnn-geometry-controls .ag-lab-field.is-disabled {
    opacity: .48;
}

.ag-cnn-geometry-controls .ag-lab-field.is-disabled input {
    cursor: not-allowed;
}

.ag-cnn-geometry-lab {
    display: grid;
    gap: 16px;
    padding: 18px;
    overflow: hidden;
    border: 1px solid #afc4ee;
    border-top: 4px solid #0f4af2;
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 10px 26px rgba(17, 40, 84, .07);
}

.ag-cnn-geometry-lab > header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(240px, auto);
    align-items: center;
    gap: 14px;
}

.ag-cnn-geometry-lab > header > div {
    display: grid;
    gap: 4px;
}

.ag-cnn-geometry-lab > header span {
    color: #0f4af2;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-cnn-geometry-lab > header strong {
    color: #071331;
    font-size: 18px;
    line-height: 1.25;
}

.ag-cnn-geometry-lab > header code {
    display: block;
    max-width: 100%;
    padding: 9px 11px;
    overflow-wrap: anywhere;
    border-radius: 4px;
    background: #071331;
    color: #fff;
    font: 700 10px/1.45 ui-monospace, SFMono-Regular, Consolas, monospace;
    text-align: center;
}

.ag-cnn-geometry-flow {
    display: flex;
    align-items: stretch;
    gap: 8px;
    min-width: 0;
}

.ag-cnn-geometry-flow > div {
    display: grid;
    flex: 1 1 110px;
    align-content: center;
    gap: 5px;
    min-width: 0;
    min-height: 92px;
    padding: 12px 10px;
    border: 1px solid #c9d7ef;
    border-radius: 6px;
    background: #f7f9fd;
    text-align: center;
}

.ag-cnn-geometry-flow > div.is-output {
    border-color: #0f4af2;
    background: #eaf1ff;
}

.ag-cnn-geometry-flow span {
    color: #63718c;
    font-size: 9px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-cnn-geometry-flow strong {
    color: #071331;
    font-size: 17px;
    font-variant-numeric: tabular-nums;
}

.ag-cnn-geometry-flow small {
    color: #63718c;
    font-size: 9px;
    line-height: 1.35;
}

.ag-cnn-geometry-flow > i {
    display: grid;
    flex: 0 0 14px;
    place-items: center;
    color: #0f4af2;
    font-size: 16px;
    font-style: normal;
    font-weight: 900;
}

.ag-cnn-geometry-lab > p {
    margin: 0;
    padding: 11px 13px;
    border-left: 3px solid #22b6e8;
    background: #eef8fb;
    color: #42516d;
    font-size: 10px;
    line-height: 1.55;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-pipeline {
    grid-template-columns: repeat(auto-fit, minmax(105px, 1fr));
    overflow: visible;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-studio .ag-cnn-pipeline button {
    min-width: 0;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-workspace {
    grid-template-columns: minmax(0, 1.45fr) minmax(190px, .55fr);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-focus canvas,
.ag-lesson-simulator--lesson-8 .ag-cnn-channel canvas,
.ag-lesson-simulator--lesson-8 .ag-real-cnn-sample canvas {
    max-width: 100%;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-kernel {
    grid-template-columns: repeat(var(--kernel-size, 3), minmax(0, 1fr));
}

@container ag-simulator (max-width: 1100px) {
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__body {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border-right: 0;
        border-bottom: 1px solid #d9e3f5;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-control-intro,
    .ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls,
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-proof {
        grid-column: 1 / -1;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls > header {
        grid-column: 1 / -1;
    }
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@container ag-simulator (max-width: 760px) {
    .ag-cnn-geometry-lab > header {
        grid-template-columns: 1fr;
    }
    .ag-cnn-geometry-flow {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .ag-cnn-geometry-flow > i {
        display: none;
    }
    .ag-cnn-geometry-flow > div.is-output {
        grid-column: 1 / -1;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-workspace,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-inspector {
        grid-template-columns: 1fr;
    }
}

@container ag-simulator (max-width: 520px) {
    .ag-lesson-simulator--lesson-8 .ag-lesson-simulator__controls,
    .ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls,
    .ag-cnn-geometry-flow,
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dl,
    .ag-lesson-simulator--lesson-8 .ag-cnn-overview,
    .ag-lesson-simulator--lesson-8 .ag-cnn-pipeline,
    .ag-lesson-simulator--lesson-8 .ag-cnn-channels {
        grid-template-columns: 1fr;
    }
    .ag-lesson-simulator--lesson-8 .ag-cnn-control-intro,
    .ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls,
    .ag-lesson-simulator--lesson-8 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-proof,
    .ag-cnn-geometry-flow > div.is-output {
        grid-column: auto;
    }
    .ag-cnn-geometry-lab,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        padding: 12px;
    }
}

/* Lesson 8 final cascade guard: keep the classifier output compact. */
.ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
    display: grid;
    grid-template-columns: 86px minmax(230px, .72fr) minmax(470px, 1.5fr);
    align-items: center;
    gap: 14px;
    margin: 0 0 12px;
    padding: 12px;
    border: 1px solid rgba(88, 143, 238, .5);
    border-radius: 6px;
    background: rgba(10, 27, 63, .96);
    box-shadow: 0 16px 38px rgba(0, 5, 24, .24);
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-sample {
    gap: 5px;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-sample canvas {
    width: 78px;
    height: 78px;
    max-width: none;
    aspect-ratio: auto;
    border: 1px solid rgba(35, 213, 232, .55);
    border-radius: 5px;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict {
    gap: 7px;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dl div {
    padding: 8px;
    border-color: rgba(117, 162, 239, .28);
    border-radius: 5px;
    background: rgba(16, 41, 87, .78);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-output-vector {
    align-self: center;
    width: 100%;
    min-width: 0;
}

@container ag-simulator (max-width: 760px) {
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        grid-template-columns: 72px minmax(0, 1fr);
    }

    .ag-lesson-simulator--lesson-8 .ag-cnn-output-vector {
        grid-column: 1 / -1;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-sample canvas {
        width: 66px;
        height: 66px;
    }
}

@container ag-simulator (max-width: 520px) {
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        grid-template-columns: 62px minmax(0, 1fr);
        gap: 10px;
        padding: 10px;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-sample canvas {
        width: 56px;
        height: 56px;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dl {
        gap: 4px;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dl div {
        min-width: 0;
        padding: 7px 5px;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dt {
        overflow: hidden;
        font-size: 7px;
        line-height: 1.2;
        white-space: nowrap;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-verdict dd {
        font-size: 16px;
        line-height: 1;
        white-space: nowrap;
    }

    .ag-lesson-simulator--lesson-8 .ag-cnn-vector-values {
        grid-template-columns: repeat(5, minmax(30px, 1fr));
    }
}

/* Lesson 8 guided workflow: benchmark -> geometry -> layers -> prediction. */
.ag-lesson-simulator--lesson-8 .ag-cnn-stepper {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    padding: 10px;
    border: 1px solid #bed0f4;
    border-radius: 7px;
    background: #f5f8ff;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-stepper span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 38px;
    padding: 7px 9px;
    border: 1px solid #d5e0f5;
    border-radius: 5px;
    background: #fff;
    color: #24385f;
    font-size: 10px;
    font-weight: 800;
    text-align: center;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-stepper b,
.ag-lesson-simulator--lesson-8 .ag-cnn-step-head > span {
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #0f4af2;
    color: #fff;
    font-size: 10px;
    line-height: 1;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step {
    display: grid;
    gap: 14px;
    min-width: 0;
    padding: 16px;
    border: 1px solid #b9ccf2;
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 9px 24px rgba(20, 52, 112, .06);
}

.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step[data-learning-step="1"] { border-top: 4px solid #0f4af2; }
.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step[data-learning-step="2"] { border-top: 4px solid #1aa6d9; }
.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step[data-learning-step="3"] { border-top: 4px solid #284c9b; }
.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step[data-learning-step="4"] { border-top: 4px solid #12a77a; }

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head {
    display: grid;
    grid-template-columns: 32px minmax(0, 1fr);
    align-items: start;
    gap: 10px;
    margin: 0;
    padding: 0 0 12px;
    border-bottom: 1px solid #dce5f5;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head > span {
    width: 30px;
    height: 30px;
    margin-top: 1px;
    font-size: 11px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head > div {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head small {
    color: #0f4af2;
    font-size: 8px;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head strong {
    color: #071331;
    font-size: 15px;
    line-height: 1.25;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-step-head p {
    margin: 0;
    color: #5a6985;
    font-size: 10px;
    line-height: 1.5;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-control-step {
    display: grid;
    gap: 11px;
    padding: 13px;
    border: 1px solid #c5d4ef;
    border-radius: 7px;
    background: #fff;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-control-step .ag-cnn-step-head {
    grid-template-columns: 27px minmax(0, 1fr);
    padding-bottom: 10px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-control-step .ag-cnn-step-head > span {
    width: 25px;
    height: 25px;
    font-size: 9px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-control-step .ag-cnn-step-head strong {
    font-size: 12px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-control-step .ag-cnn-step-head p {
    font-size: 9px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-controls {
    padding: 13px;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-geometry-lab {
    padding: 14px;
    border: 1px solid #c6d5ef;
    border-radius: 6px;
    box-shadow: none;
}

.ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
    grid-template-columns: 96px minmax(0, 1fr);
    margin: 0;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-output-vector {
    width: 100%;
}

.ag-lesson-simulator--lesson-8 .ag-cnn-learning-step .ag-cnn-channel-strip {
    margin-top: 0;
}

@container ag-simulator (max-width: 1100px) {
    .ag-lesson-simulator--lesson-8 .ag-cnn-control-step {
        grid-column: 1 / -1;
    }
}

@container ag-simulator (max-width: 640px) {
    .ag-lesson-simulator--lesson-8 .ag-cnn-stepper {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ag-lesson-simulator--lesson-8 .ag-cnn-learning-step {
        padding: 12px;
    }

    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        grid-template-columns: 70px minmax(0, 1fr);
    }
}

@container ag-simulator (max-width: 420px) {
    .ag-lesson-simulator--lesson-8 .ag-cnn-stepper,
    .ag-lesson-simulator--lesson-8 .ag-real-cnn-result {
        grid-template-columns: 1fr;
    }
}

/* Lesson 15 verified ResNet-18 explainability workbench */
.ag-lesson-simulator--lesson-15 {
    --ag-xai-blue: #124cf4;
    --ag-xai-navy: #071331;
    --ag-xai-cyan: #22b6e8;
    --ag-xai-mint: #36d7ae;
}

.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__head {
    background: linear-gradient(118deg, #071331 0%, #102b6b 55%, #124cf4 100%);
}

.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__body {
    grid-template-columns: minmax(240px, 25%) minmax(0, 75%);
}

.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__controls {
    gap: 14px;
    padding: 20px;
    background: #f1f5fd;
}

.ag-lesson-simulator--lesson-15 .ag-lesson-simulator__visual {
    padding: 20px;
    background-color: #f8fbff;
    background-image: linear-gradient(#e5edfb 1px, transparent 1px), linear-gradient(90deg, #e5edfb 1px, transparent 1px);
    background-size: 28px 28px;
}

.ag-xai-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 9px;
}

.ag-xai-actions [hidden] { display: none !important; }

.ag-xai-studio {
    display: grid;
    grid-template-columns: minmax(380px, 1.35fr) minmax(270px, .65fr);
    gap: 18px;
    min-width: 0;
}

.ag-xai-image-card,
.ag-xai-reading {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #b9ccef;
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 18px 45px rgba(7, 19, 49, .12);
}

.ag-xai-photo {
    --ag-xai-blend: .68;
    position: relative;
    aspect-ratio: 1;
    min-height: 0;
    overflow: hidden;
    isolation: isolate;
    cursor: crosshair;
    background: #071331;
}

.ag-xai-photo:focus-visible {
    outline: 3px solid #22b6e8;
    outline-offset: -3px;
}

.ag-xai-photo > img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.ag-xai-photo > [data-xai-input] {
    z-index: 0;
    filter: saturate(1.03) contrast(1.02);
}

.ag-xai-photo > .ag-xai-map {
    z-index: 1;
    opacity: var(--ag-xai-blend);
    transition: opacity 180ms ease;
    pointer-events: none;
}

.ag-xai-photo[data-xai-method="integrated"] > .ag-xai-map {
    mix-blend-mode: normal;
}

.ag-xai-scan-window {
    position: absolute;
    z-index: 2;
    left: 0;
    top: 0;
    width: 25%;
    aspect-ratio: 1;
    display: none;
    border: 2px solid #fff;
    background: rgba(7, 19, 49, .82);
    box-shadow: 0 0 0 2px #22b6e8, 0 12px 30px rgba(7, 19, 49, .28);
    pointer-events: none;
}

.ag-xai-photo[data-xai-method="occlusion"].is-scanning .ag-xai-scan-window {
    display: block;
    animation: ag-xai-scan 3.1s steps(7, end) both;
}

@keyframes ag-xai-scan {
    0% { transform: translate(0, 0); }
    14% { transform: translate(150%, 0); }
    28% { transform: translate(300%, 0); }
    42% { transform: translate(300%, 150%); }
    56% { transform: translate(150%, 150%); }
    70% { transform: translate(0, 150%); }
    84% { transform: translate(0, 300%); }
    100% { transform: translate(300%, 300%); }
}

.ag-xai-probe {
    position: absolute;
    z-index: 5;
    display: grid;
    min-width: 118px;
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, .64);
    border-radius: 5px;
    background: rgba(7, 19, 49, .94);
    color: #fff;
    box-shadow: 0 12px 28px rgba(7, 19, 49, .28);
    transform: translate(-50%, calc(-100% - 12px));
    pointer-events: none;
}

.ag-xai-probe::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -6px;
    width: 10px;
    height: 10px;
    background: #071331;
    transform: translateX(-50%) rotate(45deg);
}

.ag-xai-probe strong { color: #59dcbd; font-size: 14px; }
.ag-xai-probe span { color: #c6d5ef; font-size: 8px; line-height: 1.35; }

.ag-xai-prediction {
    position: absolute;
    z-index: 4;
    left: 14px;
    bottom: 14px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2px 14px;
    max-width: calc(100% - 28px);
    padding: 10px 13px;
    border: 1px solid rgba(255, 255, 255, .38);
    border-radius: 6px;
    background: rgba(7, 19, 49, .9);
    color: #fff;
    backdrop-filter: blur(10px);
}

.ag-xai-prediction span {
    grid-column: 1 / -1;
    color: #aebfe2;
    font-size: 8px;
    font-weight: 800;
    text-transform: uppercase;
}

.ag-xai-prediction strong,
.ag-xai-prediction b { color: #fff; font-size: 14px; }
.ag-xai-prediction b { color: #59dcbd; }

.ag-xai-legend {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    padding: 13px 15px 7px;
}

.ag-xai-legend > span {
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, #1c7af6, #e9effa, #f13d4d, #ffda27);
}

.ag-xai-legend p,
.ag-xai-credit { margin: 0; color: #54627c; font-size: 9px; line-height: 1.5; }
.ag-xai-credit { padding: 0 15px 14px; }
.ag-xai-credit a { color: #41506d; text-decoration: underline; text-underline-offset: 2px; }

.ag-xai-reading {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 18px;
}

.ag-xai-reading > span {
    color: #124cf4;
    font-size: 8px;
    font-weight: 900;
    text-transform: uppercase;
}

.ag-xai-reading h5 { margin: 0; color: #071331; font-size: 19px; line-height: 1.2; }
.ag-xai-reading > p { margin: 0; color: #4d5c78; font-size: 10px; line-height: 1.6; }
.ag-xai-reading > code {
    display: block;
    overflow-wrap: anywhere;
    padding: 10px;
    border-radius: 5px;
    background: #071331;
    color: #d9e5ff;
    font-size: 8px;
    line-height: 1.5;
}

.ag-xai-top5 {
    margin-top: 2px;
    padding-top: 12px;
    border-top: 1px solid #dbe5f6;
}

.ag-xai-top5 header { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 9px; }
.ag-xai-top5 header span { color: #71809b; font-size: 8px; }
.ag-xai-top5 header strong { color: #071331; font-size: 10px; }
.ag-xai-top5 [data-xai-top5] { display: grid; gap: 7px; }
.ag-xai-top5 [data-xai-top5] > div {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 72px 38px;
    align-items: center;
    gap: 7px;
}
.ag-xai-top5 span { min-width: 0; overflow: hidden; color: #32415f; font-size: 8px; text-overflow: ellipsis; white-space: nowrap; }
.ag-xai-top5 span b { display: inline-grid; place-items: center; width: 17px; height: 17px; margin-right: 6px; border-radius: 50%; background: #edf3ff; color: #124cf4; font-size: 7px; }
.ag-xai-top5 i { height: 5px; overflow: hidden; border-radius: 99px; background: #e8eef9; }
.ag-xai-top5 em { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #124cf4, #22b6e8); }
.ag-xai-top5 div > strong { color: #071331; font-size: 8px; text-align: right; }

.ag-xai-method-note {
    margin-top: auto;
    padding: 11px;
    border: 1px solid #bdd0f2;
    border-left: 3px solid #12a879;
    border-radius: 5px;
    background: #f5f9ff;
}
.ag-xai-method-note strong { color: #071331; font-size: 9px; }
.ag-xai-method-note p { margin: 4px 0 0; color: #5a6882; font-size: 8px; line-height: 1.5; }

@container ag-simulator (max-width: 1050px) {
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__body { grid-template-columns: 1fr; }
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ag-lesson-simulator--lesson-15 .ag-xai-actions,
    .ag-lesson-simulator--lesson-15 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-15 .ag-xai-disclaimer { grid-column: 1 / -1; }
}

@container ag-simulator (max-width: 720px) {
    .ag-xai-studio { grid-template-columns: 1fr; }
    .ag-xai-photo { aspect-ratio: 1; }
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__controls { grid-template-columns: 1fr; }
    .ag-lesson-simulator--lesson-15 .ag-xai-actions,
    .ag-lesson-simulator--lesson-15 .ag-lab-metrics,
    .ag-lesson-simulator--lesson-15 .ag-xai-disclaimer { grid-column: auto; }
}

@container ag-simulator (max-width: 430px) {
    .ag-lesson-simulator--lesson-15 .ag-lesson-simulator__visual { padding: 10px; }
    .ag-xai-prediction { left: 9px; bottom: 9px; max-width: calc(100% - 18px); }
    .ag-xai-top5 [data-xai-top5] > div { grid-template-columns: minmax(0, 1fr) 58px 34px; }
}