/* ===== Algorithm Visualizer Styles ===== */

/* ===== Language Switcher ===== */
.lang-switcher {
    margin-left: auto;
    display: flex;
    gap: 3px;
    align-items: center;
}

.lang-btn {
    width: 28px;
    height: 24px;
    border: 1px solid var(--av-border, #2a3444);
    border-radius: 4px;
    background: transparent;
    color: var(--av-text-light, #8892a4);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    line-height: 24px;
    text-align: center;
    font-family: inherit;
}

.lang-btn:hover {
    background: var(--av-accent-light, #1e2248);
    border-color: var(--av-accent, #3B82F6);
    color: var(--av-accent, #3B82F6);
}

.lang-btn.active {
    background: var(--av-accent, #3B82F6);
    border-color: var(--av-accent, #3B82F6);
    color: #fff;
}

:root {
    --bubble-sort-color: #3B82F6;
    --bubble-sort-bg: #0d1630;
    --bubble-sort-light: #152048;

    --av-bg: #141922;
    --av-card-bg: #1a2030;
    --av-border: #2a3444;
    --av-text: #e0e4ea;
    --av-text-light: #8892a4;
    --av-radius: 8px;
    --av-shadow: 0 2px 8px rgba(0,0,0,0.3);
    --av-accent: #3B82F6;
    --av-accent-bg: #0d1630;
    --av-accent-light: #152048;
    --av-transition: 0.25s ease;

    --av-bar-default: #3B82F6;
    --av-bar-comparing: #FBBF24;
    --av-bar-swapping: #EF4444;
    --av-bar-sorted: #10B981;
    --av-bar-examined: #6B7280;

    --linear-search-color: #8B5CF6;
    --linear-search-bg: #1a0d30;
    --linear-search-light: #221548;

    --bfs-color: #06B6D4;
    --bfs-bg: #0d1a22;
    --bfs-light: #15252f;

    --dfs-color: #A855F7;
    --dfs-bg: #1a0d2e;
    --dfs-light: #25154a;

    --dijkstra-color: #F43F5E;
    --dijkstra-bg: #1a0d12;
    --dijkstra-light: #2d1520;

    --bst-color: #F59E0B;
    --bst-bg: #1a1508;
    --bst-light: #2d2210;

    --fibonacci-color: #EC4899;
    --fibonacci-bg: #1a0d18;
    --fibonacci-light: #2d1528;

    --av-bar-reading: #A78BFA;
    --av-bar-computing: #FBBF24;
    --av-bar-result: #EC4899;
    --av-node-computing: #FBBF24;
    --av-node-cached: #06B6D4;
    --av-node-duplicate: #EF4444;

    --av-node-unvisited: #4B5563;
    --av-node-queued: #FBBF24;
    --av-node-visiting: #3B82F6;
    --av-node-visited: #10B981;
    --av-edge-default: #374151;
    --av-edge-active: #FBBF24;

    --kmp-color: #14B8A6;
    --kmp-bg: #0d1a1a;
    --kmp-light: #15282a;

    --av-str-cell-default: #374151;
    --av-str-cell-comparing: #FBBF24;
    --av-str-cell-match: #10B981;
    --av-str-cell-mismatch: #EF4444;
    --av-str-cell-found: #14B8A6;
    --av-str-cell-idle: #4B5563;
    --av-str-lps-active: #A78BFA;
    --av-str-lps-set: #3B82F6;

    --hash-table-color: #F97316;
    --hash-table-bg: #1a1208;
    --hash-table-light: #2d1f10;

    --av-hash-empty: #374151;
    --av-hash-occupied: #3B82F6;
    --av-hash-checking: #FBBF24;
    --av-hash-inserting: #10B981;
    --av-hash-collision: #EF4444;
    --av-hash-probing: #A78BFA;
    --av-hash-found: #14B8A6;
    --av-hash-not-found: #6B7280;
}

/* ===== Page Container ===== */
.av-page {
    max-width: 1200px;
    min-width: 960px;
    margin: 0 auto;
    padding: 0 10px;
    color: var(--av-text);
}

.av-page *,
.av-page *::before,
.av-page *::after {
    box-sizing: border-box;
}

.av-page button,
.av-page select,
.av-page input,
.av-page textarea {
    color: var(--av-text);
    font-family: inherit;
}

/* ===== Category Bar ===== */
.av-category-bar {
    display: flex;
    flex-direction: row;
    gap: 4px;
    margin-bottom: 8px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    padding: 4px;
}

.av-category {
    flex: 1;
    padding: 8px 12px;
    border: 2px solid transparent;
    border-radius: 6px;
    background: transparent;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--av-transition);
    color: var(--av-text-light);
    text-align: center;
}

.av-category:hover:not(.disabled) {
    background: var(--av-bg);
    color: var(--av-text);
}

.av-category.active {
    background: var(--av-accent-bg);
    border-color: var(--av-accent);
    color: var(--av-accent);
}

.av-category.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Algorithm Navigation Tabs ===== */
.av-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    padding: 4px;
    flex-wrap: wrap;
}

.av-tab {
    flex: 1;
    padding: 10px 12px;
    border: 2px solid transparent;
    border-radius: 6px;
    background: transparent;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--av-transition);
    color: var(--av-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
    min-width: 0;
}

.av-tab:hover:not(.disabled) {
    background: var(--av-bg);
    color: var(--av-text);
}

.av-tab.active[data-algorithm="bubble-sort"] {
    background: var(--bubble-sort-bg);
    border-color: var(--bubble-sort-color);
    color: var(--bubble-sort-color);
}

.av-tab.active[data-algorithm="linear-search"] {
    background: var(--linear-search-bg);
    border-color: var(--linear-search-color);
    color: var(--linear-search-color);
}

.av-tab.active[data-algorithm="bfs"] {
    background: var(--bfs-bg);
    border-color: var(--bfs-color);
    color: var(--bfs-color);
}

.av-tab.active[data-algorithm="dfs"] {
    background: var(--dfs-bg);
    border-color: var(--dfs-color);
    color: var(--dfs-color);
}
.av-tab.active[data-algorithm="dijkstra"] {
    background: var(--dijkstra-bg);
    border-color: var(--dijkstra-color);
    color: var(--dijkstra-color);
}

.av-tab.active[data-algorithm="bst-operations"] {
    background: var(--bst-bg);
    border-color: var(--bst-color);
    color: var(--bst-color);
}
.av-tab.active[data-algorithm="fibonacci"] {
    background: var(--fibonacci-bg);
    border-color: var(--fibonacci-color);
    color: var(--fibonacci-color);
}
.av-tab.active[data-algorithm="kmp"] {
    background: var(--kmp-bg);
    border-color: var(--kmp-color);
    color: var(--kmp-color);
}

.av-tab.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== Mode Tabs ===== */
.mode-tabs {
    display: flex;
    gap: 2px;
    margin-bottom: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    background: var(--av-card-bg);
    border-radius: var(--av-radius);
    padding: 4px 4px 0;
    border: 1px solid var(--av-border);
    border-bottom: none;
}

.mode-tab {
    padding: 6px 12px;
    border: none;
    border-bottom: 2px solid transparent;
    background: transparent;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    color: var(--av-text-light);
    transition: all var(--av-transition);
}

.mode-tab:hover {
    color: var(--av-text);
    border-bottom-color: var(--av-text-light);
}

.mode-tab.active {
    color: var(--av-accent);
    border-bottom-color: var(--av-accent);
    font-weight: 700;
}

/* ===== Global Controls ===== */
.global-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    flex-wrap: nowrap;
    gap: 8px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    padding: 8px 12px;
    transition: none;
}

.global-controls.is-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 0 0 var(--av-radius) var(--av-radius);
    box-shadow: var(--av-shadow);
}

.global-controls-placeholder {
    display: none;
}

.global-controls-placeholder.is-active {
    display: block;
}

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

.controls-right {
    display: flex;
    gap: 6px;
    align-items: center;
}

.ctrl-btn {
    padding: 7px 16px;
    border: 1px solid var(--av-border);
    border-radius: 6px;
    background: var(--av-card-bg);
    color: var(--av-text);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--av-transition);
}

.ctrl-btn:hover {
    background: var(--av-border);
}

.run-btn { color: var(--av-accent); border-color: var(--av-accent); }
.run-btn:hover { background: var(--av-accent); color: #fff; }
.pause-btn { color: #F59E0B; border-color: #F59E0B; }
.pause-btn:hover:not(:disabled) { background: #F59E0B; color: var(--av-bg); }
.pause-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.reset-btn { color: var(--av-text-light); border-color: var(--av-border); }
.reset-btn:hover { border-color: var(--av-text-light); background: var(--av-text-light); color: var(--av-bg); }

.speed-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--av-text-light);
    margin-left: 8px;
}

.speed-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100px;
    height: 6px;
    background: var(--av-border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.speed-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--av-accent);
    border-radius: 50%;
    cursor: pointer;
    transition: box-shadow var(--av-transition);
}

.speed-range::-webkit-slider-thumb:hover {
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.5);
}

.speed-range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--av-accent);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.speed-value {
    display: none;
}

/* ===== Stat Items ===== */
.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 8px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
}

.stat-label {
    font-size: 10px;
    text-transform: uppercase;
    color: var(--av-text-light);
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--av-text);
    line-height: 1.2;
}

/* ===== Step Controls ===== */
.step-btn {
    padding: 7px 12px;
    border: 1px solid var(--av-border);
    border-radius: 6px;
    background: var(--av-card-bg);
    color: var(--av-text);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--av-transition);
}

.step-btn:hover:not(:disabled) {
    background: var(--av-border);
}

.step-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.step-btn.active {
    color: var(--av-accent);
    border-color: var(--av-accent);
}

.step-btn.active:hover {
    background: var(--av-accent);
    color: var(--av-bg);
}

/* ===== Algorithm Description ===== */
.av-desc {
    font-size: 13px;
    color: var(--av-text-light);
    padding: 8px 12px;
    background: var(--av-accent-bg);
    border-left: 3px solid var(--av-accent);
    border-radius: 0 6px 6px 0;
    margin-bottom: 12px;
    line-height: 1.5;
}

/* ===== Algorithm Details (Collapsible) ===== */
.av-details {
    margin-bottom: 12px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    overflow: hidden;
}

.av-details-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: var(--av-text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--av-transition);
}

.av-details-toggle:hover {
    background: var(--av-bg);
}

.av-details-toggle-icon {
    font-size: 10px;
    transition: transform var(--av-transition);
    color: var(--av-accent);
}

.av-details-toggle[aria-expanded="true"] .av-details-toggle-icon {
    transform: rotate(90deg);
}

.av-details-body {
    display: none;
    padding: 0 14px 14px;
}

.av-details-body.expanded {
    display: block;
}

.av-details-section {
    margin-bottom: 12px;
}

.av-details-section:last-child {
    margin-bottom: 0;
}

.av-details-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-accent);
    margin-bottom: 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--av-border);
}

.av-details-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.av-details-list li {
    font-size: 12px;
    color: var(--av-text-light);
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--av-bg);
    line-height: 1.4;
}

.av-details-list li::before {
    content: '\2022';
    color: var(--av-accent);
    margin-right: 6px;
    font-weight: 700;
}

.av-concepts-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.av-concept {
    display: flex;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 4px;
    background: var(--av-bg);
    font-size: 12px;
    line-height: 1.4;
}

.av-concept-term {
    font-weight: 700;
    color: var(--av-accent);
    white-space: nowrap;
    min-width: 80px;
    flex-shrink: 0;
}

.av-concept-def {
    color: var(--av-text-light);
}

/* ===== Visualization Area ===== */
.viz-area {
    position: relative;
    min-height: 480px;
    margin-bottom: 12px;
    padding: 24px;
    background: var(--av-bg);
    border-radius: var(--av-radius);
    border: 1px solid var(--av-border);
    box-shadow: 0 2px 12px rgba(0,0,0,0.2);
    display: flex;
    flex-direction: column;
}

#av-canvas {
    position: relative;
    width: 100%;
    min-height: 440px;
    flex: 1;
    display: flex;
    align-items: flex-end;
}

/* ===== Bar Container & Bars ===== */
.av-bar-container {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    width: 100%;
    height: 420px;
    padding: 0 10px;
}

.av-bar {
    flex: 1;
    min-width: 0;
    background: var(--av-bar-default);
    border-radius: 4px 4px 0 0;
    position: relative;
    transition: background-color 0.15s ease, box-shadow 0.15s ease;
    cursor: default;
}

.av-bar-value {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 600;
    color: var(--av-text-light);
    white-space: nowrap;
}

/* Bar states */
.av-bar.av-comparing {
    background: var(--av-bar-comparing);
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.5), 0 0 24px rgba(251, 191, 36, 0.2);
}

.av-bar.av-swapping {
    background: var(--av-bar-swapping);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.5), 0 0 24px rgba(239, 68, 68, 0.2);
}

.av-bar.av-sorted {
    background: var(--av-bar-sorted);
}

.av-bar.av-examined {
    background: var(--av-bar-examined);
    opacity: 0.5;
}
.av-bar.av-reading {
    background: var(--av-bar-reading);
    box-shadow: 0 0 12px rgba(167, 139, 250, 0.5);
}
.av-bar.av-computing {
    background: var(--av-bar-computing);
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
}
.av-bar.av-result {
    background: var(--av-bar-result);
    box-shadow: 0 0 16px rgba(236, 72, 153, 0.6);
}
.av-bar.av-base-case {
    background: #10B981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

/* ===== Binary Search Pointer Labels ===== */
.av-bs-pointer {
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 3px;
    white-space: nowrap;
    z-index: 6;
    pointer-events: none;
}
.av-bs-ptr-low {
    color: #3B82F6;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
}
.av-bs-ptr-mid {
    color: #FBBF24;
    background: rgba(251, 191, 36, 0.15);
    border: 1px solid rgba(251, 191, 36, 0.3);
}
.av-bs-ptr-high {
    color: #EF4444;
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ===== Bar Legend ===== */
.av-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 20px;
    padding: 10px 0;
    font-size: 12px;
    color: var(--av-text-light);
    border-top: 1px solid var(--av-border);
}

.av-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.av-legend-swatch {
    display: inline-block;
    width: 16px;
    height: 12px;
    border-radius: 3px;
}

.av-legend-default { background: var(--av-bar-default); }
.av-legend-comparing { background: var(--av-bar-comparing); }
.av-legend-swapping { background: var(--av-bar-swapping); }
.av-legend-sorted { background: var(--av-bar-sorted); }
.av-legend-scanning { background: var(--av-bar-comparing); }
.av-legend-examined { background: var(--av-bar-examined); opacity: 0.5; }
.av-legend-found { background: var(--av-bar-sorted); }

/* ===== Target Banner (Search Algorithms) ===== */
.av-target-banner {
    position: absolute;
    top: 8px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--av-accent-bg);
    border: 1px solid var(--av-accent);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--av-accent);
    z-index: 10;
    letter-spacing: 0.3px;
}

.av-target-input {
    width: 60px;
    padding: 4px 8px;
    border: 1px solid var(--av-accent);
    border-radius: 4px;
    background: var(--av-bg);
    color: var(--av-accent);
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    font-family: inherit;
    outline: none;
}

.av-target-input:focus {
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.3);
}

.av-target-line {
    position: absolute;
    left: 10px;
    right: 10px;
    border-top: 2px dashed var(--av-accent);
    opacity: 0.4;
    z-index: 5;
    pointer-events: none;
}

/* ===== Jump Search Info Banner ===== */
.av-jump-banner {
    position: absolute;
    top: 8px;
    right: 200px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--av-accent-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--av-text-light);
    z-index: 10;
}
.av-jump-banner .av-jump-value {
    color: var(--av-accent);
    font-weight: 700;
}

/* ===== Trade-offs Section ===== */
.av-tradeoffs {
    margin-bottom: 12px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    overflow: hidden;
}

.av-tradeoffs-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: var(--av-text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--av-transition);
}

.av-tradeoffs-toggle:hover {
    background: var(--av-bg);
}

.av-tradeoffs-toggle-icon {
    font-size: 10px;
    transition: transform var(--av-transition);
    color: var(--av-accent);
}

.av-tradeoffs-toggle[aria-expanded="true"] .av-tradeoffs-toggle-icon {
    transform: rotate(90deg);
}

.av-tradeoffs-body {
    display: none;
    padding: 0 14px 14px;
}

.av-tradeoffs-body.expanded {
    display: block;
}

.tradeoffs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
}

.tradeoffs-col {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tradeoffs-col-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--av-border);
}

.tradeoffs-col-title.pros { color: #a6e3a1; }
.tradeoffs-col-title.cons { color: #f38ba8; }

.tradeoffs-item {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--av-bg);
    line-height: 1.4;
}

.tradeoffs-item.pro {
    color: #a6e3a1;
    border-left: 2px solid #a6e3a1;
}

.tradeoffs-item.con {
    color: #f38ba8;
    border-left: 2px solid #f38ba8;
}

.tradeoffs-when {
    font-size: 12px;
    color: var(--av-text-light);
    padding: 8px 10px;
    border-radius: 4px;
    background: var(--av-bg);
    border-left: 3px solid var(--av-accent);
    line-height: 1.5;
}

.tradeoffs-when-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-accent);
    margin-bottom: 4px;
}

/* ===== Complexity / Dependency Rules Panel ===== */
.dep-rules-panel {
    margin-bottom: 12px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    overflow: hidden;
}

.dep-rules-header {
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: var(--av-text-light);
    border-bottom: 1px solid var(--av-border);
    background: var(--av-bg);
}

.dep-rules-body {
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dep-rule {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
}

.dep-rule.allowed {
    color: #a6e3a1;
    background: rgba(166, 227, 161, 0.05);
}

.dep-rule.forbidden {
    color: #f38ba8;
    background: rgba(243, 139, 168, 0.05);
}

.dep-rule.info {
    color: var(--av-accent);
    background: rgba(59, 130, 246, 0.05);
}

.dep-rule-icon {
    font-size: 14px;
    flex-shrink: 0;
}

/* ===== Event Log ===== */
.event-log-container {
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: var(--av-radius);
    overflow: hidden;
    margin-bottom: 20px;
}

.event-log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--av-bg);
    border-bottom: 1px solid var(--av-border);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: var(--av-text-light);
}

.event-log-header > div { display: flex; gap: 6px; }

.log-clear-btn {
    padding: 3px 10px;
    border: 1px solid var(--av-border);
    border-radius: 4px;
    background: transparent;
    color: var(--av-text-light);
    font-size: 11px;
    cursor: pointer;
    transition: all var(--av-transition);
}

.log-clear-btn:hover {
    background: var(--av-border);
    color: var(--av-text);
}

.event-log {
    max-height: 200px;
    overflow-y: auto;
    padding: 8px 12px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 11px;
    line-height: 1.6;
}

.log-entry {
    display: flex;
    gap: 8px;
    padding: 2px 0;
}

.log-time {
    color: var(--av-text-light);
    flex-shrink: 0;
}

.log-type {
    font-weight: 700;
    min-width: 70px;
    flex-shrink: 0;
}

.log-type.COMPARE { color: #FBBF24; }
.log-type.SWAP { color: #EF4444; }
.log-type.SORTED { color: #10B981; }
.log-type.PASS { color: #8B5CF6; }
.log-type.DONE { color: #3B82F6; }
.log-type.REQUEST { color: #3B82F6; }
.log-type.SCAN { color: #8B5CF6; }
.log-type.FOUND { color: #10B981; }

.log-text {
    color: var(--av-text);
}

/* ===== Graph Visualization (SVG) ===== */
.av-graph-svg {
    width: 100%;
    height: 100%;
    min-height: 420px;
}

.av-node circle {
    transition: fill 0.3s ease, stroke 0.3s ease, filter 0.3s ease;
}

.av-node text {
    font-family: inherit;
    font-weight: 700;
    pointer-events: none;
}

.av-node-unvisited circle { fill: var(--av-node-unvisited); stroke: #6B7280; stroke-width: 2; }
.av-node-unvisited text { fill: #D1D5DB; }

.av-node-queued circle { fill: var(--av-node-queued); stroke: #F59E0B; stroke-width: 3; }
.av-node-queued text { fill: #1a2030; }

.av-node-visiting circle {
    fill: var(--av-node-visiting);
    stroke: #60A5FA;
    stroke-width: 3;
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.6));
}
.av-node-visiting text { fill: #fff; }

.av-node-visited circle { fill: var(--av-node-visited); stroke: #34D399; stroke-width: 2; }
.av-node-visited text { fill: #fff; }

.av-node-pending circle { fill: #1a2030; stroke: #2a3444; stroke-width: 1; opacity: 0.25; }
.av-node-pending text { fill: #4B5563; opacity: 0.25; }

.av-node-inserted circle { fill: #B45309; stroke: #F59E0B; stroke-width: 2.5; filter: drop-shadow(0 0 4px rgba(245, 158, 11, 0.4)); }
.av-node-inserted text { fill: #FEF3C7; }

.av-node-computing circle { fill: var(--av-node-computing); stroke: #F59E0B; stroke-width: 3; filter: drop-shadow(0 0 8px rgba(251, 191, 36, 0.6)); }
.av-node-computing text { fill: #1a2030; }
.av-node-cached circle { fill: var(--av-node-cached); stroke: #22D3EE; stroke-width: 2.5; filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5)); }
.av-node-cached text { fill: #fff; }
.av-node-duplicate circle { fill: var(--av-node-duplicate); stroke: #F87171; stroke-width: 2; opacity: 0.7; }
.av-node-duplicate text { fill: #FEE2E2; opacity: 0.8; }

.av-edge {
    stroke: var(--av-edge-default);
    stroke-width: 2;
    transition: stroke 0.3s ease, stroke-width 0.3s ease, filter 0.3s ease;
}

.av-edge-active {
    stroke: var(--av-edge-active);
    stroke-width: 3;
    filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.5));
}

.av-edge-traversed {
    stroke: var(--av-node-visited);
    stroke-width: 2.5;
}

.av-edge-relaxed {
    stroke: var(--av-accent, #F43F5E);
    stroke-width: 3;
    filter: drop-shadow(0 0 6px rgba(244, 63, 94, 0.6));
}

/* ===== Edge Weight Labels ===== */
.av-edge-weight {
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    fill: #9CA3AF;
    pointer-events: none;
}

/* ===== Distance Labels (below nodes) ===== */
.av-dist-label {
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    fill: var(--av-accent, #F43F5E);
    pointer-events: none;
    transition: fill 0.3s ease;
}

.av-edge-pending {
    stroke: #2a3444;
    stroke-width: 1;
    opacity: 0.15;
    stroke-dasharray: 4 4;
}

.av-edge[data-cross="true"] {
    stroke-dasharray: 6 4;
    opacity: 0.5;
}

.av-edge-active[data-cross="true"] {
    stroke-dasharray: 6 4;
    opacity: 0.8;
}

.av-edge-traversed[data-cross="true"] {
    stroke-dasharray: 6 4;
    opacity: 0.6;
}

.av-tree-svg .av-edge-traversed {
    stroke: #F59E0B;
    stroke-width: 2;
    opacity: 0.6;
}

/* ===== BST Insert Banner ===== */
.av-insert-banner {
    position: absolute;
    top: 8px;
    right: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--bst-bg);
    border: 1px solid var(--bst-color);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--bst-color);
    z-index: 10;
    letter-spacing: 0.3px;
    transition: opacity 0.3s ease;
}

.av-insert-banner .av-insert-value {
    font-size: 18px;
    min-width: 32px;
    text-align: center;
}

/* ===== Queue Panel ===== */
.av-queue-panel {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    margin-bottom: 8px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
    min-height: 44px;
    flex-wrap: wrap;
}

.av-queue-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-text-light);
    flex-shrink: 0;
}

.av-queue-items {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.av-queue-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 28px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 700;
    background: var(--av-node-queued);
    color: #1a2030;
    transition: all 0.2s ease;
}

.av-queue-empty {
    font-size: 12px;
    color: var(--av-text-light);
    font-style: italic;
}

/* ===== DFS Stack Panel ===== */
.av-stack-item {
    background: var(--dfs-color);
    color: #fff;
}

/* ===== Priority Queue Item ===== */
.av-pq-item {
    width: auto;
    padding: 0 8px;
    gap: 2px;
}
.av-pq-dist {
    font-size: 10px;
    opacity: 0.7;
    margin-left: 1px;
}

/* ===== Graph Legend Swatches ===== */
.av-legend-node-unvisited {
    background: var(--av-node-unvisited);
    border-radius: 50%;
    width: 14px;
    height: 14px;
}

.av-legend-node-queued {
    background: var(--av-node-queued);
    border-radius: 50%;
    width: 14px;
    height: 14px;
}

.av-legend-node-visiting {
    background: var(--av-node-visiting);
    border-radius: 50%;
    width: 14px;
    height: 14px;
    box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
}

.av-legend-node-visited {
    background: var(--av-node-visited);
    border-radius: 50%;
    width: 14px;
    height: 14px;
}

.av-legend-edge-active {
    background: var(--av-edge-active);
    width: 16px;
    height: 3px;
    border-radius: 2px;
}

.av-legend-node-pending {
    background: #2a3444;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    opacity: 0.4;
}

.av-legend-node-comparing {
    background: var(--av-node-visiting);
    border-radius: 50%;
    width: 14px;
    height: 14px;
}

.av-legend-node-inserted {
    background: #B45309;
    border: 1.5px solid #F59E0B;
    border-radius: 50%;
    width: 14px;
    height: 14px;
}

/* ===== DP Legend Swatches ===== */
.av-legend-bar-default { background: var(--av-bar-default); }
.av-legend-bar-reading { background: var(--av-bar-reading); }
.av-legend-bar-computing { background: var(--av-bar-computing); }
.av-legend-bar-filled { background: var(--av-bar-sorted); }
.av-legend-bar-result { background: var(--av-bar-result); }
.av-legend-bar-base { background: #10B981; }
.av-legend-node-computing { background: var(--av-node-computing); border-radius: 50%; width: 14px; height: 14px; }
.av-legend-node-cached { background: var(--av-node-cached); border-radius: 50%; width: 14px; height: 14px; }
.av-legend-node-duplicate { background: var(--av-node-duplicate); border-radius: 50%; width: 14px; height: 14px; opacity: 0.7; }

/* ===== Dijkstra Legend Swatches ===== */
.av-legend-edge-weight {
    background: transparent;
    color: #9CA3AF;
    font-size: 9px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 14px;
}
.av-legend-dist-label {
    background: transparent;
    border: 1.5px solid var(--av-accent, #F43F5E);
    border-radius: 4px;
    width: 16px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    font-weight: 700;
    color: var(--av-accent, #F43F5E);
}
.av-legend-edge-relaxed {
    background: var(--av-accent, #F43F5E);
    width: 16px;
    height: 3px;
    border-radius: 2px;
    box-shadow: 0 0 6px rgba(244, 63, 94, 0.6);
}

/* ===== BFS Start Node ===== */
@keyframes av-start-pulse {
    0%, 100% { stroke-opacity: 1; r: 32; }
    50% { stroke-opacity: 0.4; r: 36; }
}

.av-start-ring {
    fill: none;
    stroke: var(--av-accent, #06B6D4);
    stroke-width: 2;
    animation: av-start-pulse 1.8s ease-in-out infinite;
    pointer-events: none;
}

.av-node-start circle {
    fill: var(--av-node-unvisited);
    stroke: var(--av-accent, #06B6D4);
    stroke-width: 3;
    filter: drop-shadow(0 0 6px rgba(6, 182, 212, 0.5));
}

.av-node-start text {
    fill: var(--av-accent, #06B6D4);
}

/* ===== Visit Order Badge ===== */
.av-visit-order-bg {
    fill: var(--av-accent, #06B6D4);
    pointer-events: none;
}

.av-visit-order {
    font-family: inherit;
    font-size: 10px;
    font-weight: 700;
    fill: #0d1a22;
    pointer-events: none;
}

/* ===== BFS Level Bands ===== */
.av-level-band {
    pointer-events: none;
}

.av-level-label {
    font-family: inherit;
    font-size: 11px;
    font-weight: 600;
    fill: var(--av-accent, #06B6D4);
    opacity: 0.4;
    pointer-events: none;
}

/* ===== Graph Legend Swatches (Start / Visit Order) ===== */
.av-legend-node-start {
    background: var(--av-node-unvisited);
    border: 2px solid var(--av-accent, #06B6D4);
    border-radius: 50%;
    width: 14px;
    height: 14px;
    box-shadow: 0 0 6px rgba(6, 182, 212, 0.5);
}

.av-legend-visit-order {
    background: var(--av-accent, #06B6D4);
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    color: #0d1a22;
    line-height: 1;
}

/* ===== Graph Log Types ===== */
.log-type.ENQUEUE { color: #FBBF24; }
.log-type.DEQUEUE { color: #3B82F6; }
.log-type.PUSH { color: #A855F7; }
.log-type.POP { color: #3B82F6; }
.log-type.EXPLORE_EDGE { color: #A78BFA; }
.log-type.VISIT { color: #10B981; }
.log-type.COMPLETE { color: #06B6D4; }
.log-type.RELAX { color: #F43F5E; }
.log-type.INSERT { color: #F59E0B; }
.log-type.TRAVERSE { color: #A78BFA; }
.log-type.DP_BASE { color: #10B981; }
.log-type.DP_READ { color: #A78BFA; }
.log-type.DP_FILL { color: #FBBF24; }
.log-type.DP_RESULT { color: #EC4899; }
.log-type.DP_CALL { color: #8B5CF6; }
.log-type.DP_MEMO { color: #06B6D4; }
.log-type.DP_RETURN { color: #10B981; }

/* ===== String Matching Visualization ===== */
#av-canvas:has(.av-str-container) {
    align-items: center;
}

.av-str-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    padding: 20px 10px 10px;
    overflow-x: auto;
}

.av-str-row {
    display: flex;
    gap: 0;
    align-items: center;
}

.av-str-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-text-light);
    min-width: 65px;
    flex-shrink: 0;
}

.av-str-cells {
    display: flex;
    gap: 2px;
}

.av-str-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 700;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    background: var(--av-str-cell-default);
    color: var(--av-text);
    transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    position: relative;
}

.av-str-cell.av-str-empty {
    background: transparent;
    border: 1px dashed var(--av-border);
    color: transparent;
}

.av-str-index {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 9px;
    font-weight: 600;
    color: var(--av-text-light);
    opacity: 0.6;
}

.av-str-cell.av-str-comparing {
    background: var(--av-str-cell-comparing);
    color: #1a2030;
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
    transform: scale(1.05);
}

.av-str-cell.av-str-match {
    background: var(--av-str-cell-match);
    color: #fff;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.av-str-cell.av-str-mismatch {
    background: var(--av-str-cell-mismatch);
    color: #fff;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.4);
    transform: scale(1.05);
}

.av-str-cell.av-str-found {
    background: var(--av-str-cell-found);
    color: #fff;
    box-shadow: 0 0 12px rgba(20, 184, 166, 0.5);
}

.av-str-cell.av-str-idle {
    background: var(--av-str-cell-idle);
    opacity: 0.4;
}

.av-str-lps-row {
    display: flex;
    gap: 0;
    align-items: center;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px dashed var(--av-border);
}

.av-str-lps-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 30px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 700;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    background: var(--av-card-bg);
    color: var(--av-text-light);
    border: 1px solid var(--av-border);
    transition: background-color 0.2s ease, border-color 0.2s ease;
    margin-right: 2px;
}

.av-str-lps-cell.av-str-lps-active {
    background: var(--av-str-lps-active);
    color: #fff;
    border-color: var(--av-str-lps-active);
    box-shadow: 0 0 8px rgba(167, 139, 250, 0.4);
}

.av-str-lps-cell.av-str-lps-set {
    background: var(--av-str-lps-set);
    color: #fff;
    border-color: var(--av-str-lps-set);
}

.av-str-lps-cell.av-str-lps-filled {
    border-color: var(--av-accent);
    color: var(--av-accent);
}

.av-legend-str-default { background: var(--av-str-cell-default); }
.av-legend-str-comparing { background: var(--av-str-cell-comparing); }
.av-legend-str-match { background: var(--av-str-cell-match); }
.av-legend-str-mismatch { background: var(--av-str-cell-mismatch); }
.av-legend-str-found { background: var(--av-str-cell-found); }
.av-legend-str-lps { background: var(--av-str-lps-set); }

.log-type.STR_COMPARE { color: #FBBF24; }
.log-type.STR_MATCH_CHAR { color: #10B981; }
.log-type.STR_MISMATCH { color: #EF4444; }
.log-type.STR_SHIFT { color: #A78BFA; }
.log-type.STR_FOUND { color: #14B8A6; }
.log-type.STR_LPS_SET { color: #3B82F6; }

/* ===== String Input Panel ===== */
.av-str-input-panel {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    margin-bottom: 8px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
    flex-wrap: wrap;
}

.av-str-input-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.av-str-input-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-text-light);
    white-space: nowrap;
}

.av-str-input {
    padding: 4px 8px;
    border: 1px solid var(--av-border);
    border-radius: 4px;
    background: var(--av-bg);
    color: var(--av-text);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s ease;
}

.av-str-input:focus {
    border-color: var(--av-accent);
}

#av-str-input-text {
    width: 220px;
}

#av-str-input-pattern {
    width: 120px;
}

.av-str-input-btn {
    padding: 4px 14px;
    border: 1px solid var(--av-accent);
    border-radius: 4px;
    background: transparent;
    color: var(--av-accent);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.av-str-input-btn:hover {
    background: var(--av-accent);
    color: #fff;
}

/* ===== Hash Table Visualization ===== */
#av-canvas:has(.av-hash-container) {
    align-items: flex-start;
}

.av-hash-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    padding: 20px 10px 10px;
}

.av-hash-formula {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.av-hash-formula-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--av-text-light);
}

.av-hash-formula-text {
    font-size: 15px;
    color: var(--av-text);
}

.av-hash-formula-text strong {
    color: var(--av-accent);
}

.av-hash-formula.av-hash-formula-active {
    border-color: var(--av-accent);
    box-shadow: 0 0 12px rgba(249, 115, 22, 0.3);
}

.av-hash-key-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--av-accent-bg);
    border: 1px solid var(--av-accent);
    border-radius: 6px;
}

.av-hash-key-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--av-text-light);
    text-transform: uppercase;
}

.av-hash-key-value {
    font-size: 20px;
    font-weight: 800;
    color: var(--av-accent);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.av-hash-buckets {
    display: flex;
    gap: 4px;
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
}

.av-hash-bucket {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
}

.av-hash-bucket-index {
    font-size: 10px;
    font-weight: 700;
    color: var(--av-text-light);
    margin-bottom: 4px;
    opacity: 0.7;
}

.av-hash-bucket-slot {
    min-height: 44px;
    min-width: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 8px;
    border-radius: 6px;
    background: var(--av-hash-empty);
    border: 2px solid transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.av-hash-bucket-slot.av-hash-checking {
    background: var(--av-hash-checking);
    border-color: var(--av-hash-checking);
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
    transform: scale(1.05);
}

.av-hash-bucket-slot.av-hash-inserting {
    background: var(--av-hash-inserting);
    border-color: var(--av-hash-inserting);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.av-hash-bucket-slot.av-hash-collision {
    background: var(--av-hash-collision);
    border-color: var(--av-hash-collision);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.5);
    animation: av-hash-shake 0.3s ease;
}

@keyframes av-hash-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.av-hash-bucket-slot.av-hash-probing {
    background: var(--av-hash-probing);
    border-color: var(--av-hash-probing);
    box-shadow: 0 0 8px rgba(167, 139, 250, 0.4);
    opacity: 0.7;
}

.av-hash-bucket-slot.av-hash-found {
    background: var(--av-hash-found);
    border-color: var(--av-hash-found);
    box-shadow: 0 0 16px rgba(20, 184, 166, 0.6);
    transform: scale(1.08);
}

.av-hash-bucket-slot.av-hash-not-found {
    opacity: 0.4;
}

.av-hash-empty-label {
    font-size: 14px;
    color: var(--av-text-light);
    opacity: 0.5;
}

.av-hash-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--av-text);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.av-hash-value.av-hash-inserting {
    color: #fff;
    animation: av-hash-pop 0.3s ease;
}

@keyframes av-hash-pop {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.av-hash-chain {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.av-hash-chain-node {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    width: auto;
    padding: 0 6px;
    height: 32px;
    border-radius: 4px;
    background: var(--av-hash-occupied);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.av-hash-chain-node.av-hash-inserting {
    background: var(--av-hash-inserting);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
    animation: av-hash-pop 0.3s ease;
}

.av-hash-chain-node.av-hash-checking {
    background: var(--av-hash-checking);
    color: #1a2030;
    box-shadow: 0 0 8px rgba(251, 191, 36, 0.5);
}

.av-hash-chain-node.av-hash-found {
    background: var(--av-hash-found);
    box-shadow: 0 0 12px rgba(20, 184, 166, 0.5);
}

.av-hash-chain-arrow {
    font-size: 10px;
    color: var(--av-text-light);
    opacity: 0.6;
    transform: rotate(90deg);
}

.av-legend-hash-empty { background: var(--av-hash-empty); }
.av-legend-hash-occupied { background: var(--av-hash-occupied); }
.av-legend-hash-computing { background: var(--av-hash-checking); }
.av-legend-hash-collision { background: var(--av-hash-collision); }
.av-legend-hash-inserting { background: var(--av-hash-inserting); }
.av-legend-hash-probing { background: var(--av-hash-probing); }
.av-legend-hash-found { background: var(--av-hash-found); }

.log-type.HASH_COMPUTE { color: #F97316; }
.log-type.HASH_CHECK { color: #FBBF24; }
.log-type.HASH_INSERT { color: #10B981; }
.log-type.HASH_COLLISION { color: #EF4444; }
.log-type.HASH_CHAIN { color: #3B82F6; }
.log-type.HASH_PROBE { color: #A78BFA; }
.log-type.HASH_FOUND { color: #14B8A6; }
.log-type.HASH_NOT_FOUND { color: #6B7280; }

/* Hash table target input for search mode */
.av-hash-target-panel {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--av-card-bg);
    border: 1px solid var(--av-border);
    border-radius: 6px;
}

.av-hash-target-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--av-text-light);
    text-transform: uppercase;
}

.av-hash-target-input {
    width: 90px;
    padding: 4px 8px;
    border: 1px solid var(--av-border);
    border-radius: 4px;
    background: var(--av-bg);
    color: var(--av-text);
    font-size: 14px;
    font-weight: 700;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    text-align: center;
}

.av-hash-target-input:focus {
    outline: none;
    border-color: var(--av-accent);
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
    .av-page {
        min-width: auto;
    }

    .av-nav {
        flex-wrap: wrap;
    }

    .av-category-bar {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .av-bar-value {
        font-size: 8px;
        top: -16px;
    }

    .av-bar-container {
        gap: 2px;
        height: 300px;
    }

    .viz-area {
        min-height: 360px;
        padding: 16px;
    }

    #av-canvas {
        min-height: 320px;
    }

    .tradeoffs-grid {
        grid-template-columns: 1fr;
    }

    .av-str-cell {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    .av-str-lps-cell {
        width: 28px;
        height: 24px;
        font-size: 11px;
    }
    .av-str-index {
        font-size: 8px;
        top: -14px;
    }

    .av-hash-bucket {
        min-width: 48px;
    }
    .av-hash-bucket-slot {
        min-height: 36px;
        min-width: 44px;
        padding: 4px 6px;
    }
    .av-hash-chain-node {
        min-width: 36px;
        width: auto;
        padding: 0 4px;
        height: 26px;
        font-size: 11px;
    }
    .av-hash-value {
        font-size: 13px;
    }
    .av-hash-formula {
        flex-wrap: wrap;
    }
}

@media print {
    .global-controls, .event-log-container,
    .av-category-bar, .av-nav, .mode-tabs, .av-legend { display: none; }
}

@media (max-width: 600px) {
    .av-tab {
        font-size: 11px;
        padding: 8px;
    }

    .ctrl-btn {
        padding: 5px 10px;
        font-size: 11px;
    }

    .step-btn {
        padding: 5px 8px;
        font-size: 11px;
    }

    .av-legend {
        gap: 10px;
        font-size: 11px;
    }
}