/* Algorithm visualization — docked pane + optional floating panel */

/* ── Editor split row ── */
.ide-code-viz-row {
    flex: 1;
    display: flex;
    flex-direction: row;
    min-height: 0;
    overflow: hidden;
}

.ide-code-viz-row .ide-editor-section {
    flex: 1 1 100%;
    min-width: 200px;
    min-height: 0;
}

.ide-code-viz-row.viz-active .ide-editor-section {
    flex: 0 0 45%;
    min-width: 260px;
}

.viz-pane-dock {
    display: none;
    flex: 1 1 55%;
    flex-direction: column;
    min-width: 280px;
    min-height: 0;
    overflow: hidden;
    background: var(--oc-bg-sidebar, #1e1e1e);
    border-left: 1px solid var(--oc-border, #333);
}

.ide-code-viz-row.viz-active .viz-pane-dock {
    display: flex;
}

.viz-split-handle {
    width: 5px;
    cursor: col-resize;
    background: var(--oc-border, #333);
    flex-shrink: 0;
    display: none;
}

.viz-split-handle.is-visible {
    display: block;
}

.viz-split-handle:hover,
.viz-split-handle.is-dragging {
    background: var(--oc-accent, #007acc);
}

/* ── Floating overlay (detached mode) ── */
.viz-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.28);
    pointer-events: none;
}

.viz-modal-overlay.show {
    display: block;
}

.viz-float-host {
    pointer-events: none;
    position: fixed;
    inset: 0;
}

/* ── Shared viz shell ── */
.viz-shell {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    background: var(--oc-bg-darker, #252526);
}

.viz-pane-dock .viz-shell {
    flex: 1;
    width: 100%;
    height: 100%;
    border-radius: 0;
    box-shadow: none;
}

.viz-float-host .viz-shell {
    pointer-events: auto;
    position: fixed;
    width: min(96vw, 900px);
    max-height: min(88vh, 820px);
    border: 1px solid var(--oc-border, #333);
    border-radius: 12px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.viz-shell.viz-is-dragged {
    transform: none;
}

.viz-shell-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--oc-border, #333);
    background: var(--oc-bg-sidebar, #1e1e1e);
    flex-shrink: 0;
    gap: 8px;
}

.viz-mode-detached .viz-shell-header {
    cursor: grab;
    user-select: none;
    touch-action: none;
}

.viz-mode-detached .viz-shell-header:active {
    cursor: grabbing;
}

.viz-shell-header h3 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--oc-text-bright, #eee);
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.viz-shell-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.viz-shell-action {
    background: none;
    border: 1px solid transparent;
    color: var(--oc-text, #999);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
}

.viz-shell-action:hover {
    color: var(--oc-text-bright, #fff);
    background: var(--oc-bg-dark, #333);
    border-color: var(--oc-border, #444);
}

.viz-shell-close {
    font-size: 20px;
}

.viz-shell-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--oc-border, #333);
    background: var(--oc-bg-sidebar, #1e1e1e);
    padding: 0 10px;
    flex-shrink: 0;
}

.viz-shell-tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--oc-text, #999);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    padding: 8px 12px;
    margin-bottom: -1px;
}

.viz-shell-tab:hover {
    color: var(--oc-text-bright, #ddd);
}

.viz-shell-tab.active {
    color: #a5b4fc;
    border-bottom-color: #6366f1;
}

.viz-shell-body {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.viz-shell-pane {
    display: none;
    flex: 1;
    min-height: 0;
    flex-direction: column;
    overflow: hidden;
}

.viz-shell-pane.active {
    display: flex;
}

.viz-shell-pane[data-viz-pane="log"],
.viz-shell-pane[data-viz-pane="help"],
.viz-shell-pane[data-viz-pane="templates"] {
    overflow: auto;
    padding: 12px;
}

.viz-pane-dock .viz-stage {
    min-height: 120px;
}

.viz-capture-root {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.viz-record-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-color: #dc2626 !important;
    color: #fca5a5 !important;
}

.viz-record-btn:hover:not(:disabled) {
    background: rgba(220, 38, 38, 0.15) !important;
}

.viz-record-btn.is-recording,
.viz-record-btn:disabled {
    opacity: 0.85;
    cursor: wait;
}

.viz-rec-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #dc2626;
    flex-shrink: 0;
}

.viz-rec-dot.viz-rec-active {
    animation: viz-rec-pulse 1s ease-in-out infinite;
}

@keyframes viz-rec-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.viz-record-status {
    margin: 0;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    font-family: ui-monospace, monospace;
    color: #c7d2fe;
    background: rgba(99, 102, 241, 0.1);
    border-top: 1px solid var(--oc-border, #333);
    flex-shrink: 0;
}

.viz-record-status[hidden] {
    display: none !important;
}

/* Monaco execution line (also styled inline in onecompiler.jsp) */
.viz-line-highlight {
    background: rgba(99, 102, 241, 0.28) !important;
    border-left: 3px solid #818cf8 !important;
}

.viz-line-gutter {
    background: #6366f1 !important;
    width: 4px !important;
    margin-left: 3px;
}

.viz-exec-glyph {
    background: #6366f1;
    border-radius: 50%;
    width: 10px !important;
    height: 10px !important;
    margin-left: 6px;
    margin-top: 6px;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.35);
}

.viz-stage {
    flex: 1 1 auto;
    min-height: 240px;
    overflow: auto;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--oc-bg-dark, #1a1a1a);
}

.viz-stage.viz-has-primary {
    gap: 8px;
}

.viz-stage-empty {
    color: var(--oc-text, #888);
    font-size: 13px;
    text-align: center;
    padding: 2rem 1rem;
}

/* Processing indicator shown while the engine compiles/instruments the code. */
.viz-stage-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 3rem 1rem;
}

.viz-spinner {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 3px solid rgba(99, 102, 241, 0.25);
    border-top-color: #6366f1;
    animation: viz-spin 0.8s linear infinite;
}

@keyframes viz-spin {
    to { transform: rotate(360deg); }
}

.viz-loading-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--oc-text-strong, #e5e7eb);
}

.viz-loading-sub {
    font-size: 12px;
    color: var(--oc-text, #9ca3af);
    max-width: 320px;
}

@media (prefers-reduced-motion: reduce) {
    .viz-spinner { animation-duration: 2s; }
}

.viz-tracer-panel {
    background: var(--oc-bg-dark, #1e1e1e);
    border: 1px solid var(--oc-border, #333);
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

.viz-tracer-panel.viz-tracer-primary {
    border-color: #6366f1;
    box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.25);
}

.viz-tracer-panel.viz-tracer-primary .viz-tracer-title {
    color: #c7d2fe;
    background: rgba(99, 102, 241, 0.12);
}

.viz-tracer-panel.viz-tracer-compact {
    opacity: 0.92;
}

.viz-tracer-panel.viz-tracer-compact .viz-tracer-body {
    max-height: 72px;
    overflow: auto;
    padding: 6px 10px;
}

.viz-tracer-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--oc-text, #888);
    padding: 8px 10px;
    background: var(--oc-bg-darker, #252526);
    border-bottom: 1px solid var(--oc-border, #333);
}

.viz-tracer-body {
    padding: 12px 10px;
    color: var(--oc-text-bright, #eee);
}

.viz-tracer-panel.viz-tracer-primary .viz-tracer-body {
    padding: 14px 12px;
    min-height: 56px;
}

/* Array 1D */
.viz-array-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.viz-array-cell {
    min-width: 40px;
    padding: 8px 10px;
    text-align: center;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 14px;
    font-weight: 600;
    background: #2d2d30;
    border: 2px solid #555;
    border-radius: 6px;
    color: #f3f4f6;
    position: relative;
    transition: border-color 0.15s, background 0.15s, transform 0.15s;
}

.viz-tracer-panel.viz-tracer-primary .viz-array-cell {
    min-width: 48px;
    padding: 10px 12px;
    font-size: 17px;
    background: #323238;
    border-color: #666;
}

.viz-array-cell .viz-idx {
    display: block;
    font-size: 10px;
    font-weight: 500;
    color: #9ca3af;
    margin-bottom: 3px;
}

/* READING / COMPARING — amber, lifted, with a pointer caret showing "we are here". */
.viz-array-cell.is-selected {
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.28);
    color: #fff;
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 0 0 1px #f59e0b, 0 6px 16px rgba(245, 158, 11, 0.45);
    z-index: 1;
}

.viz-array-cell.is-selected .viz-idx {
    color: #fbbf24;
}

/* Pointer caret under the active cell (1-D rows only — avoids overlap between matrix rows). */
.viz-array-1d .viz-array-cell.is-selected::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid #f59e0b;
}

/* JUST CHANGED / WRITTEN — green, sustained for the step (with a brief pop in). */
.viz-array-cell.is-patched {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.30);
    color: #fff;
    box-shadow: 0 0 0 1px #22c55e, 0 0 14px rgba(34, 197, 94, 0.5);
    animation: viz-patch-pop 0.3s ease;
}

.viz-array-cell.is-patched .viz-idx {
    color: #4ade80;
}

@keyframes viz-patch-pop {
    0% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Colour key shown under the primary array. */
.viz-array-legend {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-top: 10px;
    font-size: 11px;
    color: var(--oc-text, #9ca3af);
}

.viz-array-legend .lg {
    display: inline-block;
    width: 11px;
    height: 11px;
    border-radius: 3px;
    margin-right: 5px;
    vertical-align: middle;
}

.viz-array-legend .lg-read {
    background: rgba(245, 158, 11, 0.5);
    border: 1px solid #f59e0b;
}

.viz-array-legend .lg-write {
    background: rgba(34, 197, 94, 0.5);
    border: 1px solid #22c55e;
}

.viz-hidden-note {
    margin-top: 8px;
    font-size: 11px;
    font-style: italic;
    color: var(--oc-text, #8a8f98);
    opacity: 0.8;
}

/* ── Code+viz composite shown only while recording a GIF ── */
.viz-capture-root.viz-recording-with-code {
    display: grid;
    grid-template-columns: minmax(300px, 0.95fr) minmax(0, 1.05fr);
    grid-template-rows: auto 1fr;
    gap: 12px;
    width: 940px;
    max-width: none;
    background: #1a1a1a;
    padding: 12px;
    box-sizing: border-box;
}

.viz-capture-root.viz-recording-with-code .viz-record-code { grid-column: 1; grid-row: 1 / 3; }
.viz-capture-root.viz-recording-with-code .viz-step-card { grid-column: 2; grid-row: 1; }
.viz-capture-root.viz-recording-with-code .viz-stage { grid-column: 2; grid-row: 2; }

.viz-record-code {
    background: #1e1e1e;
    border: 1px solid var(--oc-border, #333);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.viz-record-code-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--oc-text, #9ca3af);
    padding: 6px 10px;
    border-bottom: 1px solid var(--oc-border, #333);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.viz-record-code-body {
    overflow: hidden;
    max-height: 380px;
    padding: 6px 0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
    line-height: 1.55;
}

.viz-record-code-line {
    display: flex;
    padding: 0 10px;
    white-space: pre;
}

.viz-record-code-num {
    color: #6b7280;
    min-width: 26px;
    text-align: right;
    margin-right: 12px;
    user-select: none;
}

.viz-record-code-src {
    color: #d4d4d4;
}

.viz-record-code-line.is-active {
    background: rgba(99, 102, 241, 0.22);
    box-shadow: inset 3px 0 0 #6366f1;
}

.viz-record-code-line.is-active .viz-record-code-src {
    color: #fff;
}

/* Call stack */
.viz-stack-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 12px;
    font-family: ui-monospace, monospace;
}

.viz-stack-list li {
    padding: 4px 8px;
    border-bottom: 1px solid var(--oc-border, #333);
    color: var(--oc-text-bright, #eee);
}

.viz-stack-list li:last-child {
    border-bottom: none;
    background: rgba(0, 122, 204, 0.12);
    font-weight: 600;
    color: var(--oc-text-bright, #eee);
}

/* Graph (simple) */
.viz-graph-svg {
    width: 100%;
    min-height: 120px;
    max-height: 220px;
}

.viz-graph-node {
    fill: var(--oc-bg-darker, #252526);
    stroke: #60a5fa;
    stroke-width: 2;
    transition: filter 0.15s ease;
}

/* Currently-visited node. Stroke/fill are set inline (to beat the rule above);
   this just adds the glow that reads as "the algorithm is here". */
.viz-graph-node.is-selected {
    filter: drop-shadow(0 0 5px #f59e0b);
}

.viz-graph-node-label {
    fill: var(--oc-text-bright, #eee);
    font-size: 11px;
    text-anchor: middle;
    dominant-baseline: central;
}

.viz-graph-edge {
    stroke: #64748b;
    stroke-width: 1.5;
    fill: none;
}

/* Map */
.viz-map-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.viz-map-entry {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--oc-bg-darker, #252526);
    border: 1px solid var(--oc-border, #444);
    font-family: ui-monospace, monospace;
}

.viz-map-entry.is-selected {
    border-color: #f59e0b;
}

/* Playback bar */
.viz-playback {
    border-top: 1px solid var(--oc-border, #333);
    background: var(--oc-bg-darker, #252526);
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

.viz-playback-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.viz-playback-controls button {
    background: var(--oc-bg-sidebar, #333);
    border: 1px solid var(--oc-border, #444);
    color: var(--oc-text-bright, #ccc);
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 12px;
}

.viz-playback-controls button:hover:not(:disabled) {
    background: var(--oc-bg-dark, #3c3c3c);
}

.viz-playback-controls button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.viz-playback-controls select {
    background: var(--oc-bg-sidebar, #333);
    border: 1px solid var(--oc-border, #444);
    color: var(--oc-text, #ccc);
    border-radius: 4px;
    padding: 3px 6px;
    font-size: 12px;
}

.viz-scrubber {
    width: 100%;
    accent-color: var(--oc-accent, #007acc);
}

.viz-step-info {
    font-size: 11px;
    color: var(--oc-text, #888);
}

.viz-step-card {
    font-size: 12px;
    font-weight: 500;
    color: #c4b5fd;
    padding: 6px 14px;
    min-height: 1.2em;
    background: rgba(99, 102, 241, 0.08);
    border-bottom: 1px solid var(--oc-border, #333);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.viz-step-card strong {
    color: #e0e7ff;
}

.ide-toolbar-btn.viz-btn {
    border: 1px solid #6366f1;
    color: #a5b4fc;
}

.ide-toolbar-btn.viz-btn:hover:not(:disabled) {
    background: rgba(99, 102, 241, 0.15);
}

.ide-toolbar-btn.viz-btn.is-active {
    background: rgba(99, 102, 241, 0.25);
}

.ide-viz-log {
    font-family: ui-monospace, monospace;
    font-size: 12px;
    white-space: pre-wrap;
    padding: 8px;
    color: var(--oc-text, #ccc);
    min-height: 120px;
}

.viz-help-panel {
    font-size: 13px;
    padding: 4px 2px;
    color: var(--oc-text, #bbb);
    overflow: auto;
}

.viz-help-panel h4 {
    margin: 0 0 8px;
    font-size: 13px;
    color: var(--oc-text-bright, #ddd);
}

.viz-help-panel ul {
    margin: 0 0 12px;
    padding-left: 1.2rem;
}

.viz-help-panel .viz-help-warn {
    color: #fbbf24;
    font-size: 12px;
    margin-bottom: 8px;
}

.viz-help-panel li {
    margin-bottom: 6px;
}

.viz-help-panel .viz-help-ops {
    font-size: 11px;
    color: var(--oc-accent, #60a5fa);
    opacity: 0.85;
}

.viz-help-panel .viz-help-note {
    font-size: 11px;
    color: var(--oc-text, #888);
    font-style: italic;
}

/* ── Light theme (site toggle) ── */
[data-theme="light"] .viz-pane-dock,
[data-theme="light"] .viz-shell {
    --oc-bg-dark: #ffffff;
    --oc-bg-darker: #f3f4f6;
    --oc-bg-sidebar: #e5e7eb;
    --oc-border: #d1d5db;
    --oc-text: #64748b;
    --oc-text-bright: #1e293b;
}

[data-theme="light"] .viz-stack-list li:last-child {
    background: rgba(37, 99, 235, 0.12);
    color: #1e40af;
}

[data-theme="light"] .viz-tracer-panel.viz-tracer-compact {
    opacity: 1;
}

[data-theme="light"] .viz-tracer-panel.viz-tracer-primary .viz-tracer-title {
    color: #4338ca;
    background: rgba(99, 102, 241, 0.08);
}

[data-theme="light"] .viz-step-card {
    color: #5b21b6;
    border-bottom-color: var(--oc-border, #d1d5db);
}

[data-theme="light"] .viz-step-card strong {
    color: #4338ca;
}

[data-theme="light"] .viz-record-status {
    color: #4338ca;
}

[data-theme="light"] .viz-array-cell {
    background: #f8fafc;
    border-color: #94a3b8;
    color: #1e293b;
}

/* Keep highlighted cells readable on the light theme. */
[data-theme="light"] .viz-array-cell.is-selected {
    background: rgba(245, 158, 11, 0.3);
    color: #7c2d12;
}

[data-theme="light"] .viz-array-cell.is-patched {
    background: rgba(34, 197, 94, 0.3);
    color: #14532d;
}

[data-theme="light"] .viz-tracer-panel.viz-tracer-primary .viz-array-cell {
    background: #eef2ff;
    border-color: #818cf8;
}

[data-theme="light"] .viz-array-cell .viz-idx {
    color: #64748b;
}

[data-theme="light"] .viz-graph-node {
    fill: #f8fafc;
}

[data-theme="light"] .viz-graph-node-label {
    fill: #1e293b;
}

@media (max-width: 768px) {
    .ide-code-viz-row.viz-active {
        flex-direction: column;
    }

    .ide-code-viz-row.viz-active .ide-editor-section {
        flex: 1 1 50%;
        min-width: 0;
    }

    .viz-pane-dock {
        flex: 1 1 50%;
        min-width: 0;
        border-left: none;
        border-top: 1px solid var(--oc-border, #333);
    }

    .viz-split-handle.is-visible {
        display: none;
    }

    .viz-float-host .viz-shell {
        width: calc(100vw - 16px);
        max-height: 92vh;
    }

    .viz-stage {
        min-height: 180px;
    }

    .viz-playback-controls button span {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .viz-array-cell.is-patched {
        animation: none;
    }

    .viz-array-cell {
        transition: none;
    }
}

/* --- Templates gallery --- */
.viz-tpl-intro,
.viz-tpl-empty {
    margin: 0 0 12px;
    color: var(--oc-text, #999);
    font-size: 12px;
    line-height: 1.5;
}

.viz-tpl-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.viz-tpl-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    text-align: left;
    padding: 12px;
    cursor: pointer;
    background: var(--oc-bg-dark, #1e1e1e);
    border: 1px solid var(--oc-border, #333);
    border-radius: 8px;
    color: var(--oc-text-bright, #eee);
    transition: border-color 0.15s, transform 0.1s, background 0.15s;
}

.viz-tpl-card:hover {
    border-color: var(--oc-accent, #007acc);
    background: var(--oc-bg-darker, #252526);
    transform: translateY(-1px);
}

.viz-tpl-badge {
    align-self: flex-start;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 2px 7px;
    border-radius: 999px;
    color: var(--oc-accent, #4ea1ff);
    background: rgba(0, 122, 204, 0.14);
    border: 1px solid rgba(0, 122, 204, 0.35);
}

.viz-tpl-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--oc-text-bright, #fff);
}

.viz-tpl-cat {
    font-size: 11px;
    color: var(--oc-text, #888);
}

.viz-tpl-desc {
    font-size: 11px;
    line-height: 1.45;
    color: var(--oc-text, #9aa0a6);
}

/* ===== Concurrency swim-lane renderer ===== */
.viz-conc-wrap {
    max-height: 460px;
    overflow: auto;
    background: var(--oc-bg-dark, #1e1e1e);
    border-radius: 8px;
}

.viz-conc-svg { display: block; }

.viz-conc-life { stroke: #3a3a42; stroke-width: 1.5; stroke-dasharray: 2 4; }

.viz-conc-head { fill: #26262e; stroke: #3a3a42; stroke-width: 1; }
.viz-conc-head-running { stroke: #6366f1; fill: rgba(99, 102, 241, 0.18); }
.viz-conc-head-blocked { stroke: #f59e0b; fill: rgba(245, 158, 11, 0.18); }
.viz-conc-head-done    { stroke: #4b5563; fill: #20232b; }
.viz-conc-head-idle    { fill: #20232b; }

.viz-conc-lane-label {
    fill: #e5e7eb;
    font: 600 12px ui-sans-serif, system-ui, sans-serif;
    text-anchor: middle;
}

.viz-conc-block { fill: rgba(245, 158, 11, 0.22); }
.viz-conc-block-open {
    fill: rgba(245, 158, 11, 0.40);
    animation: vizConcPulseFill 1.2s ease-in-out infinite;
}

.viz-conc-msg { stroke: #cbd5e1; stroke-width: 1.6; }
.viz-conc-msg-active { stroke: #f59e0b; stroke-width: 2.4; }
.viz-conc-msg-label {
    fill: #9ca3af;
    font: 11px ui-monospace, Menlo, monospace;
    text-anchor: middle;
}

.viz-conc-pulse { fill: rgba(245, 158, 11, 0.30); animation: vizConcPulse 1.1s ease-out infinite; }

.viz-conc-caption {
    fill: #e5e7eb;
    font: 600 12px ui-monospace, Menlo, monospace;
}

@keyframes vizConcPulse {
    0% { r: 8; opacity: 0.7; }
    100% { r: 15; opacity: 0; }
}
@keyframes vizConcPulseFill {
    0%, 100% { fill-opacity: 0.40; }
    50% { fill-opacity: 0.7; }
}

.viz-conc-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    padding: 8px 4px 2px;
    font-size: 11px;
    color: #9ca3af;
}
.viz-conc-legend span { display: inline-flex; align-items: center; gap: 5px; }
.viz-conc-legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.viz-conc-legend .vc-leg-block { background: rgba(245, 158, 11, 0.4); }

[data-theme="light"] .viz-conc-wrap { background: #fff; }
[data-theme="light"] .viz-conc-life { stroke: #cbd5e1; }
[data-theme="light"] .viz-conc-head { fill: #f1f5f9; stroke: #cbd5e1; }
[data-theme="light"] .viz-conc-lane-label,
[data-theme="light"] .viz-conc-caption { fill: #1e293b; }
[data-theme="light"] .viz-conc-msg { stroke: #475569; }

/* ===== "Code changed — re-visualize" banner ===== */
.viz-stale-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 7px 12px;
    margin: 0;
    font-size: 12px;
    font-weight: 600;
    color: #fde68a;
    background: rgba(245, 158, 11, 0.14);
    border-top: 1px solid rgba(245, 158, 11, 0.4);
    border-bottom: 1px solid rgba(245, 158, 11, 0.4);
    flex-shrink: 0;
}

.viz-stale-banner span { display: inline-flex; align-items: center; gap: 6px; }

.viz-stale-rerun {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: #f59e0b;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
}
.viz-stale-rerun:hover { background: #d97706; }

/* Toolbar Visualize button nudges attention when the run is stale. */
.viz-btn.viz-btn-stale {
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.6);
    animation: vizBtnStale 1.4s ease-in-out infinite;
}
@keyframes vizBtnStale {
    0%, 100% { box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.55); }
    50% { box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.25); }
}

[data-theme="light"] .viz-stale-banner { color: #92400e; background: #fef3c7; }