.cnn-viz-page {
    min-height: calc(100vh - 84px);
    display: grid;
    grid-template-rows: auto auto auto minmax(680px, 1fr);
    gap: 12px;
    color: #0f172a;
    margin-inline: -12px;
}

.cnn-viz-header,
.cnn-command-bar,
.cnn-stage-card,
.cnn-bottom-panel,
.cnn-step-card,
.cnn-floating-controls,
.cnn-probe-card {
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
}

.cnn-viz-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 16px 18px;
}

.cnn-viz-header h1 {
    margin: 4px 0 6px;
    font-size: clamp(24px, 2.5vw, 36px);
    line-height: 1.1;
}

.cnn-viz-header p {
    max-width: 900px;
    margin: 0;
    color: #64748b;
    line-height: 1.5;
}

.cnn-viz-header strong {
    flex: 0 0 auto;
    padding: 8px 12px;
    border-radius: 999px;
    color: #1d4ed8;
    font-weight: 900;
    background: #eff6ff;
}

.cnn-command-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px;
}

.cnn-mode-group,
.cnn-command-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cnn-mode-group button,
.cnn-command-group button,
.cnn-structure-link {
    min-height: 36px;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0 15px;
    color: #475569;
    font-weight: 900;
    text-decoration: none;
    align-content: center;
    background: transparent;
    cursor: pointer;
}

.cnn-mode-group button.is-active {
    color: #ffffff;
    background: #2563eb;
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.24);
}

.cnn-command-group button,
.cnn-structure-link {
    border-color: #bfdbfe;
    color: #1d4ed8;
    background: #eff6ff;
}

.cnn-command-group .primary-button {
    color: #ffffff;
    border-color: #2563eb;
    background: linear-gradient(90deg, #2563eb, #1d4ed8);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
}

.cnn-speed-control {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 36px;
    padding: 0 12px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    color: #475569;
    font-size: 13px;
    font-weight: 900;
    background: #ffffff;
}

.cnn-speed-control input {
    width: 110px;
    accent-color: #2563eb;
}

.cnn-workbench {
    min-height: 0;
    display: grid;
    grid-template-columns: 204px minmax(0, 1fr);
    grid-template-rows: minmax(640px, 68vh) auto;
    gap: 12px;
}

.cnn-stage-card {
    position: relative;
    min-height: 640px;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    overflow: hidden;
    background:
        linear-gradient(rgba(37, 99, 235, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.045) 1px, transparent 1px),
        radial-gradient(circle at 42% 0%, rgba(96, 165, 250, 0.2), transparent 46%),
        linear-gradient(180deg, #ffffff 0%, #f5f8fd 100%);
    background-size: 28px 28px, 28px 28px, auto, auto;
}

.cnn-side-controls {
    grid-row: 1 / span 2;
    display: grid;
    align-content: start;
    gap: 12px;
}

.cnn-control-card {
    padding: 12px;
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.05);
}

.cnn-control-card p {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
    color: #475569;
    font-size: 13px;
    font-weight: 850;
}

.cnn-digit-card {
    display: grid;
    gap: 10px;
}

.cnn-digit-card canvas {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid #1e293b;
    border-radius: 14px;
    background: #000000;
    touch-action: none;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.cnn-digit-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.cnn-digit-actions button {
    min-height: 32px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

.cnn-digit-card p {
    margin: 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.45;
}

.cnn-digit-card p b {
    color: #1d4ed8;
}

.cnn-stage-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 1px solid rgba(191, 219, 254, 0.75);
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(6px);
}

.cnn-stage-topbar strong {
    display: block;
    margin-top: 2px;
    color: #0f172a;
}

.cnn-stage-topbar button,
.cnn-step-card button {
    min-height: 32px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    padding: 0 12px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

.cnn-scene-mount {
    position: relative;
    min-height: 0;
    overflow: hidden;
    cursor: grab;
}

.cnn-scene-mount canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.cnn-scene-mount:active {
    cursor: grabbing;
}

.cnn-scene-fallback {
    height: 100%;
    display: grid;
    place-items: center;
    padding: 28px;
    color: #475569;
    font-weight: 900;
    text-align: center;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    display: inline-block;
}

.dot.forward { background: #2563eb; }
.dot.backward { background: #f97316; }
.dot.update { background: #16a34a; }
.dot.blocked { background: #94a3b8; }

.cnn-check-list {
    display: grid;
    gap: 8px;
}

.cnn-check-list strong {
    margin-top: 4px;
    color: #0f172a;
    font-size: 12px;
}

.cnn-check-list label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #334155;
    font-size: 13px;
    font-weight: 850;
}

.cnn-check-list input {
    accent-color: #2563eb;
}

.cnn-probe-card {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 8px;
    z-index: 6;
    width: auto;
    max-height: 64%;
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) minmax(420px, 1.35fr);
    gap: 12px;
    padding: 12px 14px;
    border-color: #bfdbfe;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 22px 52px rgba(15, 23, 42, 0.16);
}

.cnn-probe-card[hidden] {
    display: none;
}

.cnn-probe-card h2 {
    margin: 3px 0 7px;
    font-size: 21px;
}

.cnn-probe-card > button {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    color: #475569;
    font-weight: 900;
    background: #ffffff;
    cursor: pointer;
}

.cnn-probe-layer,
.cnn-probe-card .cnn-step-card {
    min-height: 0;
    overflow: auto;
}

.cnn-probe-card .cnn-step-body {
    padding-right: 2px;
}

.cnn-probe-card dl {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin: 0 0 8px;
}

.cnn-probe-card dl div {
    padding: 6px 9px;
    border-radius: 12px;
    background: #f8fafc;
}

.cnn-probe-card dl div:nth-child(3) {
    grid-column: 1 / -1;
}

.cnn-probe-card dt {
    color: #64748b;
    font-size: 12px;
    font-weight: 900;
}

.cnn-probe-card dd {
    margin: 2px 0 0;
    color: #0f172a;
    font-weight: 950;
}

.cnn-probe-card p {
    margin: 6px 0;
    color: #475569;
    line-height: 1.45;
}

.cnn-probe-formula {
    padding: 7px 10px;
    border-radius: 12px;
    color: #1e3a8a;
    font-weight: 900;
    background: #eff6ff;
}

.cnn-bottom-panel {
    grid-column: 2;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 12px 14px;
    height: clamp(128px, 15vh, 170px);
    min-height: 0;
}

.cnn-timeline-shell {
    min-width: 0;
    display: grid;
    grid-template-rows: auto 1fr;
    gap: 0px;
    min-height: 0;
}

.cnn-timeline-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.cnn-timeline-head strong {
    color: #1d4ed8;
}

.cnn-timeline {
    display: grid;
    align-content: center;
    gap: 0px;
    min-height: 0;
    padding: 2px 2px 4px;
    overflow-x: hidden;
    overflow-y: hidden;
}

.cnn-timeline-row {
    display: grid;
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
}

.cnn-timeline-row-label {
    color: #2563eb;
    font-size: 13px;
    font-weight: 950;
}

.cnn-timeline-row-label.backward {
    color: #f97316;
}

.cnn-timeline-track {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0;
    min-height: 46px;
    min-width: 0;
}

.cnn-timeline-track::before {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    top: 20px;
    height: 2px;
    background: #bfdbfe;
}

.cnn-timeline-track.backward::before {
    background: #fed7aa;
}

.cnn-step-pill {
    position: relative;
    z-index: 1;
    flex: 1 1 0;
    min-width: 0;
    min-height: 44px;
    border: 0;
    padding: 0;
    color: #475569;
    text-align: center;
    background: transparent;
    cursor: pointer;
}

.cnn-step-pill strong {
    display: grid;
    place-items: center;
    width: 18px;
    height: 18px;
    margin: 0 auto 4px;
    border: 2px solid #60a5fa;
    border-radius: 999px;
    color: #0f172a;
    font-size: 0;
    background: #93c5fd;
}

.cnn-step-pill span {
    display: block;
    margin-top: 2px;
    color: #64748b;
    font-size: 10px;
    font-weight: 800;
}

.cnn-step-pill.is-active.theme-forward {
    color: #2563eb;
    background: transparent;
    box-shadow: none;
}

.cnn-step-pill.is-active.theme-backward {
    color: #f97316;
    background: transparent;
    box-shadow: none;
}

.cnn-step-pill.is-active.theme-update {
    color: #16a34a;
    background: transparent;
    box-shadow: none;
}

.cnn-step-pill.is-active strong {
    width: 28px;
    height: 28px;
    border-color: #bfdbfe;
    color: #ffffff;
    font-size: 0;
    background: #2563eb;
    box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.18);
}

.cnn-step-pill.is-active.theme-backward strong {
    border-color: #fed7aa;
    background: #f97316;
    box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.18);
}

.cnn-step-pill.is-active.theme-update strong {
    border-color: #bbf7d0;
    background: #16a34a;
    box-shadow: 0 0 0 5px rgba(22, 163, 74, 0.16);
}

.cnn-step-pill.is-active span {
    color: inherit;
    font-weight: 950;
}

.cnn-step-card {
    position: relative;
    min-height: 0;
    padding: 2px 4px 2px 12px;
    overflow: hidden auto;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.cnn-step-card::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 5px;
    background: #2563eb;
}

.cnn-step-card.theme-backward::before { background: #f97316; }
.cnn-step-card.theme-update::before { background: #16a34a; }

.cnn-step-card > button {
    display: none;
}

.cnn-step-card h2 {
    margin: 3px 0 7px;
    font-size: 19px;
}

.cnn-step-card.is-collapsed {
    min-height: 56px;
}

.cnn-step-card.is-collapsed .cnn-step-body,
.cnn-step-card.is-collapsed .section-label {
    display: none;
}

.cnn-step-body {
    display: grid;
    gap: 6px;
    max-height: none;
    overflow: visible;
    color: #475569;
    line-height: 1.42;
}

.cnn-step-section {
    display: grid;
    gap: 3px;
}

.cnn-step-section > strong {
    color: #1d4ed8;
    font-size: 12px;
}

.cnn-step-section p {
    margin: 0;
}

.cnn-calc-chain {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(116px, 1fr));
    align-items: stretch;
    gap: 6px;
}

.cnn-chain-item {
    min-width: 0;
    padding: 7px;
    border: 1px solid #dbeafe;
    border-radius: 10px;
    background: #f8fbff;
}

.cnn-chain-item strong {
    display: block;
    margin-bottom: 5px;
    color: #0f172a;
    font-size: 12px;
}

.cnn-chain-arrow {
    display: none;
}

.cnn-calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(116px, 1fr));
    gap: 8px;
}

.cnn-calc-box {
    padding: 9px 10px;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #f8fafc;
}

.cnn-calc-box strong {
    display: block;
    margin-bottom: 5px;
    color: #0f172a;
    font-size: 12px;
}

.cnn-mini-matrix {
    display: grid;
    gap: 2px;
    width: max-content;
    max-width: 100%;
}

.cnn-mini-matrix.cols-2 { grid-template-columns: repeat(2, 28px); }
.cnn-mini-matrix.cols-3 { grid-template-columns: repeat(3, 28px); }

.cnn-mini-matrix span {
    display: grid;
    place-items: center;
    width: 28px;
    height: 24px;
    border-radius: 6px;
    color: #0f172a;
    font-size: 11px;
    font-weight: 900;
    background: #e0f2fe;
}

.cnn-mini-matrix span.hot {
    color: #9a3412;
    background: #fed7aa;
}

.cnn-mini-matrix span.blocked {
    color: #64748b;
    background: #e2e8f0;
}

.cnn-formula-line {
    padding: 7px 10px;
    border-radius: 12px;
    color: #1e3a8a;
    font-weight: 900;
    background: #eff6ff;
    min-height: 32px;
}

.section-label {
    color: #2563eb;
    font-size: 11px;
    font-weight: 950;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

@media (max-width: 1180px) {
    .cnn-workbench {
        grid-template-columns: 1fr;
    }

    .cnn-side-controls,
    .cnn-bottom-panel {
        grid-column: 1;
    }

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

    .cnn-command-bar,
    .cnn-viz-header {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* Loss landscape / training trajectory panel */
.cnn-landscape-toggle {
    white-space: nowrap;
}

.cnn-landscape-modal {
    position: fixed;
    inset: 0;
    z-index: 80;
    display: grid;
    place-items: center;
    padding: 22px;
    background: rgba(15, 23, 42, 0.34);
    backdrop-filter: blur(10px);
}

.cnn-landscape-modal[hidden] {
    display: none;
}

.cnn-landscape-dialog {
    width: min(1480px, 94vw);
    max-height: min(900px, 92vh);
    display: grid;
    grid-template-rows: auto auto auto minmax(0, 1fr) auto;
    gap: 12px;
    padding: 18px;
    border: 1px solid rgba(191, 219, 254, 0.92);
    border-radius: 22px;
    background:
        radial-gradient(circle at 78% 0%, rgba(219, 234, 254, 0.82), transparent 42%),
        linear-gradient(180deg, rgba(255,255,255,0.98), rgba(248,251,255,0.98));
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.22);
    overflow: hidden;
}

.cnn-landscape-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.cnn-landscape-header h2 {
    margin: 4px 0 5px;
    color: #0f172a;
    font-size: clamp(22px, 2vw, 30px);
    line-height: 1.15;
}

.cnn-landscape-header p {
    margin: 0;
    color: #64748b;
    line-height: 1.5;
}

.cnn-landscape-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.cnn-landscape-actions button {
    min-height: 34px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    padding: 0 13px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

#cnnLandscapeClose {
    width: 34px;
    padding: 0;
    color: #475569;
    background: #ffffff;
}

.cnn-landscape-status {
    min-height: 36px;
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid rgba(219, 234, 254, 0.9);
    border-radius: 14px;
    color: #475569;
    font-size: 13px;
    font-weight: 850;
    background: rgba(239, 246, 255, 0.74);
}

.cnn-landscape-status.is-demo {
    color: #92400e;
    border-color: #fed7aa;
    background: #fff7ed;
}

.cnn-landscape-status.is-error {
    color: #991b1b;
    border-color: #fecaca;
    background: #fef2f2;
}

.cnn-landscape-stats {
    display: grid;
    grid-template-columns: repeat(6, minmax(110px, 1fr));
    gap: 10px;
}

.cnn-landscape-stats article {
    padding: 10px 12px;
    border: 1px solid rgba(219, 234, 254, 0.95);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.045);
}

.cnn-landscape-stats span {
    display: block;
    color: #64748b;
    font-size: 11px;
    font-weight: 950;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.cnn-landscape-stats strong {
    display: block;
    margin-top: 4px;
    color: #0f172a;
    font-size: 19px;
    line-height: 1;
}

.cnn-landscape-grid {
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(280px, 0.75fr) minmax(380px, 1fr) minmax(380px, 1fr);
    gap: 12px;
    overflow: auto;
    padding-right: 2px;
}

.cnn-landscape-chart-card {
    min-height: 360px;
    display: grid;
    grid-template-rows: auto minmax(300px, 1fr);
    gap: 8px;
    padding: 12px;
    border: 1px solid rgba(219, 234, 254, 0.95);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.06);
}

.cnn-chart-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.cnn-chart-title strong {
    color: #0f172a;
    font-size: 15px;
}

.cnn-chart-title span {
    color: #64748b;
    font-size: 12px;
    font-weight: 850;
}

.cnn-landscape-chart {
    min-width: 0;
    min-height: 300px;
    border-radius: 14px;
    background: #f8fbff;
    overflow: hidden;
}

.cnn-landscape-chart .plotly-notifier {
    display: none;
}

.cnn-landscape-note {
    margin: 0;
    padding: 9px 12px;
    border-left: 4px solid #2563eb;
    border-radius: 12px;
    color: #475569;
    line-height: 1.45;
    background: #eff6ff;
}

@media (max-width: 1320px) {
    .cnn-landscape-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cnn-landscape-chart-card.loss-chart {
        grid-column: 1 / -1;
        min-height: 280px;
        grid-template-rows: auto minmax(220px, 1fr);
    }
}

@media (max-width: 860px) {
    .cnn-landscape-dialog {
        width: 96vw;
        max-height: 94vh;
    }

    .cnn-landscape-stats {
        grid-template-columns: repeat(2, minmax(120px, 1fr));
    }

    .cnn-landscape-grid {
        grid-template-columns: 1fr;
    }
}

/* Learning-rate comparison controls inside Loss Landscape panel */
.cnn-lr-compare-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin: 10px 0 12px;
    padding: 12px 14px;
    border: 1px solid #dbeafe;
    border-radius: 16px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.cnn-lr-compare-bar strong {
    display: block;
    margin-top: 3px;
    color: #0f172a;
    font-size: 16px;
}

.cnn-lr-compare-bar p {
    margin: 3px 0 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.35;
}

.cnn-lr-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px;
}

.cnn-lr-actions button,
.cnn-lr-buttons button {
    min-height: 32px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    padding: 0 12px;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
    background: #eff6ff;
    cursor: pointer;
}

.cnn-lr-actions button.is-active,
.cnn-lr-buttons button.is-active {
    color: #ffffff;
    border-color: #2563eb;
    background: #2563eb;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.20);
}

.cnn-lr-buttons {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

.cnn-lr-buttons[hidden] {
    display: none;
}

.cnn-lr-buttons button.is-diverged {
    border-color: #fecaca;
    color: #b91c1c;
    background: #fff1f2;
}

.cnn-lr-buttons button.is-diverged.is-active {
    color: #ffffff;
    background: #dc2626;
    border-color: #dc2626;
}

@media (max-width: 900px) {
    .cnn-lr-compare-bar {
        align-items: flex-start;
        flex-direction: column;
    }

    .cnn-lr-actions {
        justify-content: flex-start;
    }
}