.cnn-explainer-port {
    --ce-black: #1e1e1e;
    --ce-ink: #202124;
    --ce-muted: #6b7280;
    --ce-line: #e5e7eb;
    --ce-light: #fafafa;
    --ce-blue: #3273dc;
    --ce-orange: #f59e0b;
    --ce-green: #10b981;
    display: grid;
    grid-template-rows: auto auto auto auto auto auto;
    min-height: calc(100vh - 56px);
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 18px;
    color: var(--ce-ink);
    background: #ffffff;
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
}

.cnn-explainer-port * {
    box-sizing: border-box;
}

.content-shell:has(.cnn-explainer-port) {
    width: min(var(--lab-shell-max), calc(100% - var(--lab-shell-gutter)));
    padding: 18px 0;
}

.ce-course-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: 22px 26px 16px;
    border-bottom: 1px solid var(--ce-line);
    background:
        radial-gradient(circle at 82% 18%, rgba(50, 115, 220, 0.13), transparent 28%),
        linear-gradient(135deg, #ffffff 0%, #f8fbff 58%, #eef5ff 100%);
}

.ce-course-header h1 {
    margin: 6px 0 8px;
    color: #0f172a;
    font-size: clamp(26px, 3vw, 38px);
    line-height: 1.08;
}

.ce-course-header p {
    max-width: 850px;
    margin: 0;
    color: #475569;
    font-size: 15px;
    line-height: 1.6;
}

.ce-course-header strong {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    color: #1d4ed8;
    white-space: nowrap;
    font-size: 13px;
    background: #eff6ff;
}

.ce-third-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 18px;
    border-bottom: 1px solid var(--ce-line);
    background: #ffffff;
}

.ce-third-tabs a {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 0 14px;
    border: 1px solid transparent;
    border-radius: 999px;
    color: #475569;
    font-size: 13px;
    font-weight: 800;
    text-decoration: none;
}

.ce-third-tabs a:hover,
.ce-third-tabs a.is-active {
    border-color: #bfdbfe;
    color: #1d4ed8;
    background: #eff6ff;
}

.ce-controls {
    display: flex;
    min-height: 62px;
    align-items: center;
    gap: 12px;
    padding: 9px 18px;
    border-bottom: 1px solid var(--ce-line);
    background: #ffffff;
}

.ce-image-strip {
    display: flex;
    flex: 0 1 auto;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.ce-image-strip[hidden] {
    display: none;
}

.ce-control-spacer {
    flex: 1 1 auto;
    min-width: 16px;
}

.ce-mode-switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    background: #f8fbff;
}

.ce-mode-switch button {
    min-height: 28px;
    padding: 0 12px;
    border: 1px solid transparent;
    border-radius: 999px;
    color: #475569;
    font-size: 12px;
    font-weight: 900;
    background: transparent;
    cursor: pointer;
}

.ce-mode-switch button.active {
    border-color: #bfdbfe;
    color: #1d4ed8;
    background: #eff6ff;
    box-shadow: 0 5px 14px rgba(37, 99, 235, 0.12);
}

.ce-mode-switch button[data-ce-mode="backward"].active {
    border-color: #fed7aa;
    color: #c2410c;
    background: #fff7ed;
}

.ce-mode-switch button[data-ce-mode="update"].active {
    border-color: #bbf7d0;
    color: #15803d;
    background: #f0fdf4;
}

.ce-gradient-clear {
    min-height: 32px;
    padding: 0 14px;
    border: 1px solid #fed7aa;
    border-radius: 999px;
    color: #c2410c;
    font-size: 12px;
    font-weight: 900;
    background: #fff7ed;
    cursor: pointer;
    transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.ce-gradient-clear:hover {
    border-color: #fdba74;
    background: #ffedd5;
}

.ce-image-option {
    width: 42px;
    height: 42px;
    padding: 0;
    overflow: hidden;
    border: 2px solid #d1d5db;
    border-radius: 5px;
    cursor: pointer;
    background: #f3f4f6;
    transition: border-color 180ms ease, opacity 180ms ease, transform 180ms ease;
}

.ce-upload-tile {
    display: grid;
    place-items: center;
    color: #64748b;
    font-size: 26px;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(180deg, #ffffff, #eef2f7);
}

.ce-upload-tile span {
    transform: translateY(-1px);
}

.ce-image-upload-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.ce-image-option img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.ce-image-option:hover {
    border-color: var(--ce-black);
    transform: translateY(-1px);
}

.ce-image-option.active {
    border-color: var(--ce-black);
    opacity: 1;
}

.ce-image-option:not(.active) {
    opacity: 0.42;
}

.ce-digit-drawer {
    display: grid;
    grid-template-columns: 84px minmax(160px, 240px);
    align-items: center;
    gap: 10px;
    min-width: 270px;
    padding: 7px 9px;
    border: 1px solid #dbeafe;
    border-radius: 12px;
    background: #f8fbff;
}

.ce-digit-drawer[hidden] {
    display: none;
}

.cnn-explainer-port.is-digit-model .ce-digit-drawer {
    display: none;
}

.ce-digit-drawer canvas {
    width: 84px;
    height: 84px;
    border: 2px solid #1e293b;
    border-radius: 10px;
    background: #000000;
    touch-action: none;
}

.ce-digit-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.ce-digit-actions button {
    min-height: 28px;
    padding: 0 10px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

.ce-digit-actions span {
    flex: 1 1 100%;
    color: #64748b;
    font-size: 12px;
}

.ce-hover-pill,
.ce-detail-button,
.ce-upload-button,
.ce-model-select select,
.ce-scale-select select {
    min-height: 32px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 800;
    background: #ffffff;
}

.ce-hover-pill {
    display: inline-flex;
    min-width: 118px;
    align-items: center;
    justify-content: center;
    padding: 0 12px;
    color: var(--ce-blue);
    background: #eff6ff;
}

.ce-upload-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    color: #4b5563;
    cursor: pointer;
    white-space: nowrap;
}

.ce-upload-button input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.ce-detail-button {
    padding: 0 14px;
    color: #4b5563;
    cursor: pointer;
}

.ce-upload-button:hover {
    border-color: var(--ce-black);
    color: var(--ce-black);
}

.ce-detail-button.active {
    color: var(--ce-blue);
    border-color: var(--ce-blue);
}

.ce-model-select,
.ce-scale-select {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #64748b;
    font-size: 12px;
    font-weight: 800;
}

.ce-model-select select {
    min-width: 160px;
    padding: 0 30px 0 12px;
    color: #111827;
}

.ce-scale-select select {
    padding: 0 30px 0 12px;
    color: #111827;
}

.ce-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    height: 640px;
    min-height: 640px;
    overflow: hidden;
}

.ce-network-panel {
    position: relative;
    min-width: 0;
    min-height: 640px;
    border-right: 1px solid var(--ce-line);
    background:
        radial-gradient(circle at 22% 18%, rgba(50, 115, 220, 0.08), transparent 24%),
        linear-gradient(180deg, #fbfdff 0%, #f7f7f7 100%);
}

.ce-network-svg {
    display: block;
    width: 100%;
    height: 640px;
}

.ce-side-panel {
    display: grid;
    align-content: start;
    grid-template-rows: auto auto auto minmax(0, 1fr);
    gap: 14px;
    max-height: 640px;
    min-height: 0;
    overflow: hidden;
    padding: 22px 18px;
    background: #ffffff;
}

.ce-eyebrow {
    color: var(--ce-blue);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.ce-side-panel h2 {
    margin: 0;
    font-size: 24px;
}

.ce-side-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    padding: 4px;
    border: 1px solid #dbeafe;
    border-radius: 12px;
    background: #f8fbff;
}

.ce-side-tabs button {
    min-height: 30px;
    border: 0;
    border-radius: 9px;
    color: #475569;
    font-size: 12px;
    font-weight: 900;
    cursor: pointer;
    background: transparent;
}

.ce-side-tabs button.active {
    color: #1d4ed8;
    background: #dbeafe;
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.14);
}

.ce-side-tab-panel[hidden] {
    display: none;
}

.ce-layer-meta {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
}

.ce-layer-meta div {
    padding: 10px;
    border: 1px solid var(--ce-line);
    border-radius: 8px;
    background: #f8fafc;
}

.ce-layer-meta dt {
    color: #94a3b8;
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
}

.ce-layer-meta dd {
    margin: 4px 0 0;
    font-size: 14px;
    font-weight: 900;
}

#ceLayerDesc {
    margin: 0;
    color: #475569;
    line-height: 1.6;
    font-size: 13px;
}

.ce-formula-box {
    display: grid;
    gap: 8px;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    background: #f8fafc;
}

.ce-formula-label {
    color: var(--ce-blue);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.ce-latex-block {
    padding: 1px 0;
    display: flex;
    justify-content: center;
    overflow-x: auto;
    overflow-y: hidden;
    min-height: 48px;
    background: #ffffff;
    border-radius: 6px;
    border: 1px inset rgba(0,0,0,0.02);
}

.ce-latex-block .katex-display {
    margin: 0.4em 0;
    font-size: 0.92em;
}

/* 针对可能过长的公式做微调 */
.ce-latex-block .katex {
    white-space: nowrap;
}

.ce-mini-view {
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 12px;
    border: 1px solid var(--ce-line);
    border-radius: 12px;
    background: #fbfdff;
    overscroll-behavior: contain;
}

.ce-detail-overlay {
    position: fixed;
    left: 50%;
    top: 50%;
    z-index: 80;
    width: min(900px, calc(100vw - 56px));
    max-height: calc(100vh - 72px);
    overflow: auto;
    padding: 16px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.18);
    transform: translate(-50%, -50%);
}

.ce-detail-overlay h3 {
    margin: 0 0 12px;
    font-size: 18px;
}

.ce-detail-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: 12px;
    align-items: center;
}

.ce-detail-grid.is-wide {
    grid-template-columns: 1fr 1fr;
    align-items: start;
}

.ce-detail-stack {
    display: grid;
    gap: 10px;
}

.ce-input-preview-frame {
    display: grid;
    place-items: center;
    width: 100%;
    min-height: 220px;
    padding: 12px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #ffffff;
}

.ce-input-preview-frame.is-large {
    min-height: 260px;
}

.ce-input-preview-frame.is-mini {
    min-height: 0;
    padding: 8px;
}

.ce-input-preview {
    display: block;
    width: 100%;
    height: auto;
    max-height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.ce-digit-inline-canvas,
.ce-digit-card-canvas,
.ce-digit-detail-canvas {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 6px;
    background: #000000;
    cursor: crosshair;
    touch-action: none;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

.ce-digit-inline-canvas {
    border: 1px solid rgba(15, 23, 42, 0.55);
}

.ce-input-preview-frame.is-digit-input-card {
    min-height: 0;
    gap: 8px;
    background: #f8fbff;
}

.ce-input-preview-frame.is-mini .ce-digit-card-canvas {
    width: min(100%, 210px);
    aspect-ratio: 1 / 1;
    height: auto;
    border: 2px solid #0f172a;
    border-radius: 10px;
}

.ce-input-preview-frame.is-large .ce-digit-detail-canvas {
    width: min(100%, 300px);
    aspect-ratio: 1 / 1;
    height: auto;
    border: 2px solid #0f172a;
    border-radius: 12px;
}

.ce-digit-inline-actions {
    display: flex;
    justify-content: center;
    width: 100%;
}

.ce-digit-inline-actions button {
    min-height: 28px;
    padding: 0 14px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

.ce-digit-inline-actions button:hover {
    border-color: #60a5fa;
    background: #dbeafe;
}
.ce-detail-caption {
    margin: 8px 0 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.55;
}

.ce-detail-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    color: #111827;
    font-size: 13px;
    font-weight: 900;
}

.ce-detail-label span {
    color: #64748b;
    font-size: 11px;
}

.ce-detail-panel {
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #fbfdff;
}

.ce-calc-detail {
    display: grid;
    gap: 10px;
}

.ce-calc-section {
    padding: 10px 12px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #fbfdff;
}

.ce-calc-section h4 {
    margin: 4px 0 0;
    color: #0f172a;
    font-size: 18px;
}

.ce-calc-section strong {
    display: block;
    margin-bottom: 6px;
    color: #2563eb;
    font-size: 12px;
}

.ce-calc-detail.is-backward .ce-calc-section strong,
.ce-calc-detail.is-backward .ce-calc-eyebrow {
    color: #ea580c;
}

.ce-calc-detail.is-update .ce-calc-section strong,
.ce-calc-detail.is-update .ce-calc-eyebrow {
    color: #16a34a;
}

.ce-calc-section p {
    margin: 0;
    color: #475569;
    line-height: 1.55;
}

.ce-calc-eyebrow {
    color: #2563eb;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.ce-calc-formula {
    overflow-x: auto;
    padding: 8px 10px;
    border-radius: 10px;
    background: #eef6ff;
}

.ce-calc-detail.is-backward .ce-calc-formula {
    background: #fff7ed;
}

.ce-calc-detail.is-update .ce-calc-formula {
    background: #f0fdf4;
}

.ce-calc-chain {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: nowrap;
    width: max-content;
    max-width: none;
}

.ce-calc-chain.is-vector-eq {
    align-items: flex-start;
}

.ce-calc-branches {
    display: grid;
    gap: 10px;
}

.ce-calc-branch {
    padding: 10px;
    overflow-x: auto;
    border: 1px solid #fed7aa;
    border-radius: 12px;
    background: #fffaf5;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.ce-calc-branch > span {
    display: block;
    margin-bottom: 10px;
    color: #c2410c;
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0;
    word-spacing: 0;
}

.ce-calc-branches.is-update-chain .ce-calc-branch {
    border-color: #bbf7d0;
    background: #f7fef9;
}

.ce-calc-branches.is-update-chain .ce-calc-branch > span {
    color: #15803d;
}

.ce-calc-chip {
    flex: 0 0 auto;
    min-width: 112px;
}

.ce-calc-vector {
    flex: 0 0 auto;
    min-width: 170px;
    padding: 10px;
    border: 1px solid #fed7aa;
    border-radius: 12px;
    background: #fff7ed;
}

.ce-calc-vector .ce-vector-strip {
    gap: 5px;
}

.ce-grad-token.is-hot {
    outline: 2px solid #f97316;
    outline-offset: 1px;
}

.ce-grad-token.is-negative {
    color: #b91c1c;
    background: #fee2e2;
}

.ce-grad-token.is-positive {
    color: #9a3412;
    background: #ffedd5;
}

.ce-calc-arrow {
    flex: 0 0 auto;
    min-width: 28px;
    max-width: 72px;
    display: grid;
    place-items: center;
    color: #64748b;
    text-align: center;
    font-size: 18px;
    font-weight: 900;
    line-height: 1.15;
    white-space: normal;
}

.ce-calc-arrow sup {
    font-size: 0.68em;
    line-height: 0;
}

.ce-calc-arrow-note {
    max-width: 120px;
    font-size: 13px;
    font-weight: 800;
    line-height: 1.2;
}

.ce-calc-arrow-note span {
    color: #16a34a;
    font-weight: 900;
}

.ce-calc-result {
    flex: 0 0 auto;
    min-width: 98px;
    padding: 10px;
    border: 1px solid #dbeafe;
    border-radius: 10px;
    color: #1e3a8a;
    text-align: center;
    background: #eff6ff;
}

.ce-calc-result.is-grad {
    border-color: #fed7aa;
    color: #9a3412;
    background: #fff7ed;
}

.ce-calc-result.is-update {
    border-color: #bbf7d0;
    color: #166534;
    background: #f0fdf4;
}

.ce-calc-result.is-update-old {
    border-color: #bfdbfe;
    color: #1e40af;
    background: #eff6ff;
}

.ce-calc-result.is-update-grad {
    border-color: #fed7aa;
    color: #9a3412;
    background: #fff7ed;
}

.ce-calc-note {
    flex-basis: 100%;
    margin: 2px 0 0;
    color: #64748b;
    font-size: 12px;
}

.ce-calc-section.is-conclusion {
    border-left: 4px solid #2563eb;
}

.ce-calc-detail.is-backward .ce-calc-section.is-conclusion {
    border-left-color: #f97316;
}

.ce-calc-detail.is-update .ce-calc-section.is-conclusion {
    border-left-color: #22c55e;
}

.ce-kernel-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.ce-relu-graph {
    width: 100%;
    height: 120px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background:
        linear-gradient(90deg, transparent 49%, #d1d5db 49%, #d1d5db 50%, transparent 50%),
        linear-gradient(0deg, transparent 49%, #d1d5db 49%, #d1d5db 50%, transparent 50%),
        #ffffff;
}

.ce-softmax-detail {
    display: grid;
    gap: 8px;
}

.ce-softmax-row {
    display: grid;
    grid-template-columns: 92px 1fr 46px;
    align-items: center;
    gap: 10px;
    width: 100%;
    border: 0;
    padding: 0;
    color: inherit;
    text-align: left;
    font-size: 12px;
    font-weight: 800;
    background: transparent;
    cursor: pointer;
}

.ce-softmax-row:hover,
.ce-softmax-row.is-target {
    color: #c2410c;
}

.ce-softmax-row.is-target .ce-softmax-track {
    box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.25);
}

.ce-softmax-track {
    height: 10px;
    overflow: hidden;
    border-radius: 999px;
    background: #e5e7eb;
}

.ce-softmax-fill {
    display: block;
    width: var(--prob);
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #f97316, #9a3412);
}

.ce-softmax-row.top .ce-softmax-fill {
    background: linear-gradient(90deg, #ea580c, #7c2d12);
}

.ce-softmax-play {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 30px;
    margin-top: 12px;
    padding: 0 12px;
    border: 1px solid #fed7aa;
    border-radius: 6px;
    color: #c2410c;
    font-size: 12px;
    font-weight: 900;
    cursor: pointer;
    background: #fff7ed;
}

.ce-softmax-row.is-animating {
    color: #c2410c;
}

.ce-softmax-row.is-animating .ce-softmax-fill {
    animation: ceSoftmaxPulse 0.75s ease;
    box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.2);
}

.ce-softmax-row.is-animating .ce-softmax-track {
    box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.22);
}

.ce-softmax-substitution {
    display: grid;
    gap: 8px;
    margin: 10px 0;
}

.ce-softmax-eq {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 8px 10px;
    border-radius: 8px;
    color: #475569;
    font-size: 12px;
    background: #f8fafc;
}

.ce-softmax-eq strong {
    color: #111827;
    font-variant-numeric: tabular-nums;
}

.ce-softmax-eq.is-main {
    background: #fff7ed;
}

.ce-softmax-eq.is-main strong {
    color: #c2410c;
}

.ce-softmax-table {
    display: grid;
    gap: 3px;
    margin-top: 10px;
    font-size: 11px;
    font-variant-numeric: tabular-nums;
}

.ce-softmax-table-head,
.ce-softmax-calc-row {
    display: grid;
    grid-template-columns: 74px 70px 92px 52px;
    gap: 8px;
    align-items: center;
}

.ce-softmax-table-head {
    color: #64748b;
    font-weight: 900;
}

.ce-softmax-calc-row {
    padding: 5px 6px;
    border-radius: 6px;
    color: #334155;
    background: #ffffff;
}

.ce-softmax-calc-row.top {
    color: #9a3412;
    font-weight: 900;
}

.ce-softmax-calc-row.is-target {
    color: #c2410c;
    background: #fff7ed;
    box-shadow: inset 0 0 0 1px rgba(249, 115, 22, 0.22);
}

.ce-softmax-calc-row.is-animating {
    color: #c2410c;
    background: #ffedd5;
    box-shadow: inset 0 0 0 1px rgba(249, 115, 22, 0.28);
}

.ce-mini-cell.is-demo-hot {
    position: relative;
    z-index: 1;
    outline: 3px solid #2563eb;
    outline-offset: 1px;
    box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.16), 0 8px 18px rgba(37, 99, 235, 0.24);
    transform: translateY(-1px) scale(1.04);
}

.ce-mini-cell.is-demo-kernel {
    outline: 3px solid #f97316;
    outline-offset: 1px;
    box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.16);
}

.ce-mini-cell.is-demo-output {
    outline: 3px solid #16a34a;
    outline-offset: 1px;
    box-shadow: 0 0 0 5px rgba(22, 163, 74, 0.16);
}

.ce-mini-cell.is-demo-off {
    opacity: 0.24;
    filter: grayscale(1);
}

.ce-mini-cell.is-grad-hot,
.ce-calc-result.is-grad-hot,
.ce-calc-chip.is-grad-hot,
.ce-calc-branch.is-grad-hot,
.ce-vector-chip.is-grad-hot,
.ce-softmax-row.is-grad-hot,
.ce-softmax-calc-row.is-grad-hot,
.ce-fc-links line.is-grad-hot {
    outline: 3px solid #f97316;
    outline-offset: 1px;
    box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.16), 0 8px 18px rgba(249, 115, 22, 0.2);
    transform: translateY(-1px) scale(1.03);
}

.ce-mini-cell.is-grad-off,
.ce-calc-result.is-grad-off,
.ce-calc-branch.is-grad-off,
.ce-vector-chip.is-grad-off {
    opacity: 0.32;
    filter: grayscale(1);
}

.ce-calc-result.is-update-old,
.ce-calc-chip.is-update-old {
    outline: 3px solid #2563eb;
    box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.14);
}

.ce-calc-result.is-update-grad,
.ce-calc-chip.is-update-grad {
    outline: 3px solid #f97316;
    box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.14);
}

.ce-calc-result.is-update-new,
.ce-calc-chip.is-update-new {
    outline: 3px solid #22c55e;
    box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.16);
}

@keyframes ceSoftmaxPulse {
    0% {
        transform: scaleX(0.25);
        transform-origin: left center;
        opacity: 0.45;
    }
    100% {
        transform: scaleX(1);
        transform-origin: left center;
        opacity: 1;
    }
}

.ce-pool-mark {
    outline: 3px solid #f59e0b;
    outline-offset: -3px;
}

.ce-relu-off {
    filter: grayscale(1);
    opacity: 0.45;
}

.ce-detail-symbol {
    color: #64748b;
    font-size: 22px;
    font-weight: 900;
}

.ce-detail-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border: 1px solid #d1d5db;
    border-radius: 50%;
    cursor: pointer;
    background: #ffffff;
}

.ce-principle-panel {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 34px;
    background:
        radial-gradient(circle at 50% 20%, rgba(50, 115, 220, 0.18), transparent 34%),
        rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(3px);
}

.ce-principle-panel[hidden] {
    display: none;
}

.ce-principle-panel.is-visible {
    display: flex;
}

.ce-principle-empty {
    padding: 16px 18px;
    border: 1px dashed #bfdbfe;
    border-radius: 12px;
    color: #2563eb;
    font-size: 13px;
    font-weight: 900;
    background: #eff6ff;
}

.ce-principle-shell {
    display: grid;
    gap: 14px;
    width: min(1180px, calc(100vw - 72px));
    max-height: calc(100vh - 76px);
    overflow: auto;
    padding: 18px;
    border: 1px solid rgba(203, 213, 225, 0.85);
    border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(239, 246, 255, 0.92), rgba(255, 255, 255, 0.98) 28%, rgba(255, 247, 237, 0.75)),
        #ffffff;
    box-shadow: 0 28px 80px rgba(15, 23, 42, 0.26);
}

.ce-principle-header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 16px;
}

.ce-principle-header h3 {
    margin: 0;
    font-size: 20px;
}

.ce-principle-header p {
    margin: 6px 0 0;
    color: #64748b;
    font-size: 13px;
    line-height: 1.6;
}

.ce-principle-close {
    width: 32px;
    height: 32px;
    border: 1px solid #cbd5e1;
    border-radius: 50%;
    color: #475569;
    font-size: 18px;
    font-weight: 900;
    cursor: pointer;
    background: #ffffff;
}

.ce-principle-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.ce-principle-badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 0 8px;
    border-radius: 999px;
    color: #1d4ed8;
    font-size: 11px;
    font-weight: 900;
    background: #dbeafe;
}

.ce-principle-badge.is-backward {
    color: #c2410c;
    background: #ffedd5;
}

.ce-principle-badge.is-update {
    color: #15803d;
    background: #dcfce7;
}

.ce-principle-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    align-items: stretch;
}

.ce-principle-grid.is-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ce-principle-stage {
    display: grid;
    grid-template-columns: minmax(210px, 1fr) auto minmax(150px, 0.68fr) auto minmax(130px, 0.56fr) auto minmax(180px, 0.82fr);
    gap: 12px;
    align-items: center;
}

.ce-principle-stage.is-pool {
    grid-template-columns: minmax(220px, 1.2fr) auto minmax(150px, 0.7fr) auto minmax(190px, 0.9fr);
}

.ce-principle-stage.is-relu {
    grid-template-columns: minmax(180px, 1fr) auto minmax(180px, 1fr) auto minmax(180px, 1fr);
}

.ce-principle-stage.is-generic {
    grid-template-columns: minmax(240px, 1fr) minmax(260px, 1fr);
}

.ce-principle-stage.is-input {
    grid-template-columns: repeat(3, minmax(150px, 1fr)) minmax(220px, 1.1fr);
}

.ce-principle-stage.is-fc {
    grid-template-columns: minmax(260px, 1fr) auto minmax(220px, 0.8fr) auto minmax(260px, 1fr);
}

.ce-principle-operator {
    display: grid;
    place-items: center;
    min-width: 34px;
    color: #1e3a8a;
    font-size: 24px;
    font-weight: 1000;
}

.ce-principle-operator.is-orange {
    color: #c2410c;
}

.ce-principle-card {
    padding: 14px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #fbfdff;
}

.ce-principle-card.is-demo-source {
    box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.16);
}

.ce-principle-card h4 {
    margin: 0 0 10px;
    font-size: 15px;
}

.ce-principle-steps {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.ce-principle-steps li {
    padding: 9px 10px;
    border-left: 3px solid #3273dc;
    border-radius: 8px;
    color: #475569;
    font-size: 13px;
    line-height: 1.5;
    background: #eff6ff;
}

.ce-principle-formula {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 10px;
    border-radius: 8px;
    color: #1e3a8a;
    font-weight: 900;
    background: #eff6ff;
}

.ce-matrix-note {
    margin: 8px 0 0;
    color: #64748b;
    font-size: 11px;
    line-height: 1.45;
}

.ce-stack-wrap {
    display: grid;
    gap: 8px;
}

.ce-stack-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: #111827;
    font-size: 13px;
    font-weight: 900;
}

.ce-stack-label span {
    color: #64748b;
    font-size: 11px;
}

.ce-stack-canvas {
    position: relative;
    min-height: 198px;
    padding: 22px 18px 8px 0;
}

.ce-stack-canvas.is-kernel {
    min-height: 142px;
    padding: 18px 18px 8px 0;
}

.ce-stack-front {
    position: relative;
    z-index: 4;
    margin-right: 26px;
    border-radius: 10px;
    background: rgba(251, 253, 255, 0.72);
}

.ce-stack-ghost {
    position: absolute;
    left: calc(7px * var(--stack-offset));
    right: calc(36px - 9px * var(--stack-offset));
    top: calc(44px - 9px * var(--stack-offset));
    z-index: calc(4 - var(--stack-offset));
    display: block;
    height: 246px;
    border: 1.2px solid rgba(15, 23, 42, 0.26);
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
    transform: none;
}

.ce-stack-ghost.is-kernel {
    left: calc(6px * var(--stack-offset));
    right: calc(36px - 8px * var(--stack-offset));
    top: calc(34px - 8px * var(--stack-offset));
    height: 146px;
    border-color: rgba(249, 115, 22, 0.36);
    border-radius: 9px;
}

.ce-stack-canvas .ce-detail-label {
    margin-right: 18px;
}

.is-kernel-stack .ce-latex-block,
.ce-principle-card .ce-principle-formula {
    max-width: 100%;
    font-size: 13px;
}

.ce-param-inspector {
    display: grid;
    gap: 12px;
    min-width: 0;
}

.ce-param-tabs-title {
    color: #2563eb;
    font-size: 12px;
    font-weight: 1000;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.ce-param-inspector.is-backward .ce-param-tabs-title {
    color: #ea580c;
}

.ce-param-inspector.is-update .ce-param-tabs-title {
    color: #16a34a;
}

.ce-param-section {
    display: grid;
    gap: 10px;
    padding: 12px;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    background: linear-gradient(180deg, #fbfdff, #ffffff);
}

.ce-param-inspector.is-backward .ce-param-section {
    border-color: #fed7aa;
    background: linear-gradient(180deg, #fff7ed, #ffffff);
}

.ce-param-inspector.is-update .ce-param-section {
    border-color: #bbf7d0;
    background: linear-gradient(180deg, #f0fdf4, #ffffff);
}

.ce-param-heading {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: baseline;
}

.ce-param-heading strong {
    color: #0f172a;
    font-size: 13px;
}

.ce-param-heading span {
    color: #64748b;
    font-size: 11px;
    font-weight: 900;
}

.ce-param-kernel-bank {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(58px, 1fr));
    gap: 8px;
}

.ce-param-kernel-tile {
    padding: 5px;
    border: 1px solid #dbeafe;
    border-radius: 9px;
    cursor: pointer;
    background: #ffffff;
}

.ce-param-kernel-tile.is-active {
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.16);
}

.ce-param-kernel-tile .ce-detail-label {
    margin-bottom: 3px;
    font-size: 10px;
    justify-content: center;
}

.ce-param-kernel-tile .ce-mini-matrix {
    gap: 2px;
    margin-top: 3px !important;
}

.ce-param-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 10px;
    align-items: start;
}

.ce-param-card {
    min-width: 0;
    padding: 10px;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #ffffff;
}

.ce-param-card.is-wide {
    grid-column: span 1;
}

.ce-param-card p {
    margin: 0;
    color: #475569;
    font-size: 12px;
    line-height: 1.55;
}

.ce-param-inspector .ce-calc-detail {
    min-width: 0;
}

.ce-param-inspector .ce-calc-chain {
    max-width: 100%;
    overflow-x: auto;
}

.ce-side-panel .ce-param-grid {
    grid-template-columns: 1fr;
}

.ce-side-panel .ce-param-kernel-bank {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
}

.ce-side-panel .ce-param-inspector .ce-calc-section {
    padding: 8px;
}

.ce-side-panel .ce-param-inspector {
    gap: 8px;
}

.ce-side-panel .ce-param-section {
    gap: 8px;
    padding: 10px;
}

.ce-side-panel .ce-param-kernel-tile {
    padding: 4px;
}

.ce-side-panel .ce-param-card {
    padding: 8px;
}

.ce-side-panel .ce-calc-detail {
    gap: 8px;
}

.ce-side-panel .ce-calc-section h4 {
    font-size: 16px;
}

.ce-side-panel .ce-calc-section p,
.ce-side-panel .ce-calc-note {
    font-size: 12px;
    line-height: 1.45;
}

.ce-vector-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    align-items: center;
}

.ce-vector-chip {
    min-width: 28px;
    padding: 6px 7px;
    border-radius: 7px;
    color: #0f172a;
    font-size: 11px;
    font-weight: 900;
    text-align: center;
    background: #e0f2fe;
    box-shadow: inset 0 0 0 1px rgba(2, 132, 199, 0.18);
}

.ce-fc-links {
    width: 100%;
    height: 150px;
}

.ce-fc-links line {
    stroke: rgba(148, 163, 184, 0.55);
    stroke-width: 1.2;
}

.ce-fc-links line.is-hot {
    stroke: #3273dc;
    stroke-width: 3;
}

.ce-fc-node {
    fill: #dbeafe;
    stroke: #3273dc;
    stroke-width: 1.4;
}

.ce-fc-node.is-out {
    fill: #fed7aa;
    stroke: #ea580c;
}

.ce-intermediate-layer {
    display: none;
}

.ce-intermediate-backdrop {
    fill: rgba(255, 255, 255, 0.86);
    stroke: rgba(148, 163, 184, 0.45);
    stroke-width: 1;
    filter: drop-shadow(0 16px 34px rgba(15, 23, 42, 0.16));
}

.ce-intermediate-title {
    fill: #111827;
    font-size: 15px;
    font-weight: 900;
}

.ce-intermediate-note {
    fill: #64748b;
    font-size: 11px;
}

.ce-intermediate-close {
    cursor: pointer;
}

.ce-intermediate-close rect {
    fill: #ffffff;
    stroke: #cbd5e1;
}

.ce-intermediate-close text {
    fill: #475569;
    font-size: 16px;
    font-weight: 900;
    text-anchor: middle;
    dominant-baseline: middle;
}

.ce-intermediate-cell {
    stroke: rgba(15, 23, 42, 0.12);
    stroke-width: 0.5;
}

.ce-intermediate-cell.hot {
    stroke: #f59e0b;
    stroke-width: 2;
}

.ce-intermediate-link {
    fill: none;
    stroke: #94a3b8;
    stroke-width: 1.1;
    opacity: 0.78;
}

.ce-intermediate-link.hot {
    stroke: #3273dc;
    stroke-width: 2;
    opacity: 1;
}

.ce-bottom-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(520px, 0.95fr);
    gap: 18px;
    min-height: 0;
    padding: 12px 20px;
    border-top: 1px solid var(--ce-line);
    background: #fbfdff;
}

.ce-bottom-panel p {
    margin: 6px 0 0;
    color: #475569;
    line-height: 1.45;
    font-size: 13px;
}

.ce-legend {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr);
    align-content: center;
    align-items: center;
    gap: 10px;
}

.ce-legend-row {
    display: grid;
    grid-template-columns: 78px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    color: #64748b;
    font-size: 12px;
    font-weight: 800;
}

.ce-legend-swatch {
    width: 100%;
    height: 10px;
    border: 1px solid rgba(15, 23, 42, 0.15);
    border-radius: 999px;
}

.ce-legend-scale {
    display: grid;
    gap: 3px;
}

.ce-legend-ticks {
    display: flex;
    justify-content: space-between;
    color: #94a3b8;
    font-size: 10px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.ce-legend-mode {
    color: #3273dc;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.ce-node image,
.ce-node rect.ce-output-bar,
.ce-edge {
    transition: opacity 220ms ease, stroke 220ms ease, stroke-width 220ms ease;
}

.ce-node image {
    image-rendering: pixelated;
}

.ce-node .ce-node-border {
    fill: none;
    stroke: transparent;
    stroke-width: 1.5px;
}

.ce-node.hovered .ce-node-border,
.ce-node.selected .ce-node-border {
    stroke: #111827;
    stroke-width: 2.5px;
}

.ce-node.is-update .ce-node-border {
    stroke: #16a34a;
    stroke-width: 2.5px;
    filter: drop-shadow(0 0 6px rgba(22, 163, 74, 0.4));
}

.ce-node.selected image,
.ce-node.hovered image {
    filter: drop-shadow(0 5px 8px rgba(15, 23, 42, 0.2));
}

.ce-edge {
    fill: none;
    stroke: #e5e7eb;
    stroke-width: 0.75px;
    opacity: 0.82;
    stroke-linecap: round;
    stroke-linejoin: round;
    vector-effect: non-scaling-stroke;
}

.ce-edge.is-grad {
    opacity: 0.8;
}

.ce-edge.active {
    stroke: #8b8b8b;
    stroke-width: 1.5px;
    opacity: 1;
}

.cnn-explainer-port[data-calc-mode="forward"] .ce-edge.active,
.cnn-explainer-port[data-calc-mode="forward"] .ce-node.selected .ce-node-border {
    stroke: #2563eb;
}

.cnn-explainer-port[data-calc-mode="backward"] .ce-edge.active,
.cnn-explainer-port[data-calc-mode="backward"] .ce-node.selected .ce-node-border {
    stroke: #f97316;
}

.cnn-explainer-port[data-calc-mode="update"] .ce-edge.active,
.cnn-explainer-port[data-calc-mode="update"] .ce-node.selected .ce-node-border {
    stroke: #22c55e;
}

.cnn-explainer-port[data-calc-mode="backward"] .ce-edge.active {
    stroke-dasharray: 6 4;
}

.cnn-explainer-port[data-calc-mode="update"] .ce-edge.active {
    stroke-dasharray: 2 5;
}

.ce-layer-label {
    fill: #111827;
    opacity: 0.76;
    font-size: 13px;
    text-anchor: middle;
}

.ce-layer-dimension {
    fill: #64748b;
    font-size: 10px;
    opacity: 0.8;
    text-anchor: middle;
}

.ce-layer-label.selected {
    fill: var(--ce-blue);
    font-weight: 900;
    opacity: 1;
}

.ce-output-name {
    fill: #111827;
    font-size: 10.5px;
    opacity: 0.58;
}

.ce-output-name.is-target,
.ce-output-name.is-grad-active {
    fill: #c2410c;
    opacity: 0.95;
    font-weight: 900;
}

.ce-output-track {
    fill: #e5e7eb;
}

.ce-output-bar.is-grad {
    filter: drop-shadow(0 2px 6px rgba(234, 88, 12, 0.28));
}

.ce-output-name.active {
    fill: #111827;
    opacity: 0.9;
    text-decoration: underline;
}

.ce-vector-node {
    stroke: rgba(2, 132, 199, 0.4);
    stroke-width: 0.6;
    opacity: 0.86;
}

.ce-logit-node {
    stroke: #9a3412;
    stroke-width: 1.1;
}

.ce-node.is-update .ce-logit-node {
    stroke: #16a34a;
    stroke-width: 2.2px;
}

.ce-logit-label {
    fill: #64748b;
    font-size: 9px;
    font-style: italic;
    opacity: 0.66;
    pointer-events: none;
}

.ce-classifier-note {
    fill: #64748b;
    font-size: 9px;
    font-style: italic;
    text-anchor: middle;
}

.ce-bias-node {
    fill: #fff7ed;
    stroke: #9a3412;
    stroke-width: 1;
}

.ce-plus-box,
.ce-softmax-box {
    fill: rgba(255, 255, 255, 0.92);
    stroke: #8b8b8b;
    stroke-width: 1;
}

.ce-plus-text,
.ce-softmax-box-text {
    fill: #4b5563;
    font-size: 10px;
    font-weight: 800;
    text-anchor: middle;
}

.ce-softmax-box-text {
    font-size: 11px;
}

.ce-annotation {
    fill: #64748b;
    font-size: 10px;
    font-style: italic;
}

.ce-mini-matrix {
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: 3px;
}

.ce-mini-matrix.is-compact {
    gap: 2px;
}

.ce-mini-matrix.is-zoom {
    gap: 5px;
}

.ce-mini-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--cell-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    user-select: none;
    overflow: hidden;
}

.ce-mini-matrix.is-compact .ce-mini-cell {
    border-radius: 2px;
}

.ce-mini-matrix.is-zoom .ce-mini-cell {
    min-width: 28px;
    border-radius: 6px;
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.08);
}

.ce-mini-bars {
    display: grid;
    gap: 8px;
}

.ce-mini-bar {
    display: grid;
    grid-template-columns: 72px 1fr 44px;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 800;
}

button.ce-mini-bar,
.ce-output-target-button {
    width: 100%;
    border: 0;
    padding: 0;
    color: inherit;
    text-align: left;
    background: transparent;
    cursor: pointer;
}

.ce-output-target-button:hover,
.ce-output-target-button.is-target {
    color: #c2410c;
}

.ce-mini-bar-track {
    display: block;
    height: 9px;
    overflow: hidden;
    border-radius: 999px;
    background: #e5e7eb;
}

.ce-mini-bar-fill {
    display: block;
    height: 100%;
    width: var(--bar-width);
    border-radius: inherit;
    background: linear-gradient(90deg, #fbbf24, #f97316);
}

@media (max-width: 1180px) {
    .cnn-explainer-port {
        height: auto;
        min-height: calc(100vh - 56px);
    }

    .ce-main {
        grid-template-columns: 1fr;
    }

    .ce-side-panel {
        display: none;
    }

    .ce-bottom-panel {
        grid-template-columns: 1fr;
    }

    .ce-brand span,
    .ce-header-note {
        display: none;
    }
}

/* Calculation-chain polish: keep operators compact and allow long chains to scroll inside the branch. */
.ce-calc-section {
    overflow-x: auto;
}

.ce-calc-branch .ce-calc-chain {
    padding-bottom: 2px;
}

.ce-calc-branch .ce-calc-note {
    max-width: 920px;
}