/* ═══════════════════════════════════════════════════════════════════════════ */
/* EquationWeb — Dark Scientific Theme                                       */
/* ═══════════════════════════════════════════════════════════════════════════ */

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1420;
    --bg-tertiary: #151c2c;
    --bg-hover: #1a2236;
    --text-primary: #e0e4ec;
    --text-secondary: #8892a4;
    --text-muted: #4a5568;
    --accent-gold: #FFD700;
    --accent-blue: #4A90D9;
    --border-color: rgba(255, 255, 255, 0.06);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --sidebar-width: 280px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* ─── Layout ──────────────────────────────────────────────────────────────── */

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

#top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    height: 52px;
    flex-shrink: 0;
}

.logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.logo span {
    background: linear-gradient(135deg, #4A90D9, #7C4DFF, #FFD700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-container {
    flex: 1;
    max-width: 400px;
    margin: 0 20px;
}

#search {
    width: 100%;
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#search:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

#search::placeholder {
    color: var(--text-muted);
}

.stats {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-secondary);
}

.stat {
    white-space: nowrap;
}

/* ─── Main Content Area ───────────────────────────────────────────────────── */

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ─── Sidebar ─────────────────────────────────────────────────────────────── */

#sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 0;
    z-index: 50;
    flex-shrink: 0;
}

#sidebar::-webkit-scrollbar {
    width: 4px;
}

#sidebar::-webkit-scrollbar-track {
    background: transparent;
}

#sidebar::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 2px;
}

.sidebar-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-weight: 600;
}

/* Field Filters */

.field-controls {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.field-control-btn {
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.field-control-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.filter-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    transition: color 0.15s;
}

.filter-label:hover {
    color: var(--text-primary);
}

.filter-label input[type="checkbox"] {
    display: none;
}

.filter-swatch {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
    transition: opacity 0.15s;
}

.filter-label input:not(:checked) ~ .filter-swatch {
    opacity: 0.2;
}

.filter-label input:not(:checked) ~ .filter-name {
    opacity: 0.4;
    text-decoration: line-through;
}

.filter-name {
    flex: 1;
}

.filter-count {
    font-size: 10px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 1px 6px;
    border-radius: 8px;
}

/* View Mode */

#view-modes label,
.sidebar-section label:not(.filter-label) {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
}

#view-modes input[type="radio"],
.sidebar-section input[type="radio"] {
    accent-color: var(--accent-blue);
}

/* Top Constants */

.top-constant-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
    font-size: 12px;
}

.top-constant-item:hover {
    background: var(--bg-hover);
}

.tc-symbol {
    color: var(--accent-gold);
    font-weight: 700;
    font-style: italic;
    min-width: 28px;
    font-size: 13px;
}

.tc-name {
    flex: 1;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tc-count {
    font-size: 10px;
    color: var(--accent-gold);
    background: rgba(255, 215, 0, 0.1);
    padding: 1px 6px;
    border-radius: 8px;
    font-weight: 600;
}

/* ─── Graph Container ─────────────────────────────────────────────────────── */

#graph-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse at center, rgba(74, 144, 217, 0.03) 0%, transparent 70%),
        var(--bg-primary);
}

#graph {
    width: 100%;
    height: 100%;
    cursor: grab;
}

#graph:active {
    cursor: grabbing;
}

/* Graph Nodes & Links */

.link {
    pointer-events: none;
}

.node {
    cursor: pointer;
    transition: opacity 0.3s;
}

.node-shape {
    transition: r 0.3s, fill 0.3s;
}

.node:hover .node-shape {
    filter: brightness(1.3);
}

.node-label {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    user-select: none;
}

/* ─── Tooltip ─────────────────────────────────────────────────────────────── */

#tooltip {
    position: fixed;
    z-index: 1000;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px 18px;
    max-width: 380px;
    min-width: 220px;
    box-shadow: var(--shadow);
    pointer-events: none;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.15s, transform 0.15s;
    backdrop-filter: blur(8px);
}

#tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.tooltip-field {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 4px;
}

.tooltip-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tooltip-value {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    color: var(--accent-gold);
    margin-bottom: 6px;
}

.tooltip-unit {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.tooltip-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 6px;
}

.tooltip-meta {
    font-size: 11px;
    color: var(--text-muted);
    font-style: italic;
}

/* ─── Detail Panel ────────────────────────────────────────────────────────── */

#detail-panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 360px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    z-index: 90;
    overflow-y: auto;
    padding: 20px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
}

#detail-panel.hidden {
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
}

#detail-panel::-webkit-scrollbar {
    width: 4px;
}

#detail-panel::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 2px;
}

#close-detail {
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 22px;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.15s;
}

#close-detail:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.detail-header {
    padding-left: 14px;
    margin-bottom: 16px;
}

.detail-field {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.detail-header h2 {
    font-size: 20px;
    font-weight: 700;
    margin: 6px 0;
    line-height: 1.3;
}

.detail-equation {
    margin: 12px 0;
    text-align: center;
    padding: 14px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.detail-equation .katex {
    font-size: 20px;
}

.detail-constant-value {
    margin-top: 8px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    color: var(--accent-gold);
}

.const-symbol {
    font-size: 18px;
    font-style: italic;
    font-weight: 700;
}

.detail-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.detail-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 12px;
    color: var(--text-muted);
}

.detail-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.detail-section h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.detail-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.15s;
}

.chip small {
    font-weight: 400;
    font-size: 10px;
    opacity: 0.7;
}

.chip-constant {
    background: rgba(255, 215, 0, 0.1);
    color: var(--accent-gold);
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.chip-constant:hover {
    background: rgba(255, 215, 0, 0.2);
}

.chip-variable {
    background: rgba(119, 136, 153, 0.1);
    color: #aab4c4;
    border: 1px solid rgba(119, 136, 153, 0.2);
}

.chip-variable:hover {
    background: rgba(119, 136, 153, 0.2);
}

.detail-field-group {
    margin-bottom: 12px;
}

.detail-field-group h4 {
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-related {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.related-eq {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
    transition: background 0.15s;
    font-size: 12px;
}

.related-eq:hover {
    background: var(--bg-hover);
}

.related-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.related-name {
    flex: 1;
    color: var(--text-primary);
}

.related-shared {
    font-size: 10px;
    color: var(--text-muted);
    font-style: italic;
}

/* ─── Legend ───────────────────────────────────────────────────────────────── */

#legend {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    padding: 8px 20px;
    background: rgba(15, 20, 32, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 11px;
    color: var(--text-secondary);
    z-index: 80;
    backdrop-filter: blur(8px);
}

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

.legend-dot {
    width: 10px;
    height: 10px;
    display: inline-block;
}

.legend-dot.equation {
    background: var(--accent-blue);
    border-radius: 50%;
}

.legend-dot.constant {
    background: var(--accent-gold);
    transform: rotate(45deg);
    width: 9px;
    height: 9px;
}

.legend-dot.variable {
    background: #778899;
    border-radius: 50%;
    width: 8px;
    height: 8px;
}

/* ─── Keyboard Hint ───────────────────────────────────────────────────────── */

.keyboard-hints {
    position: absolute;
    bottom: 50px;
    right: 16px;
    font-size: 10px;
    color: var(--text-muted);
    z-index: 80;
}

.keyboard-hints kbd {
    padding: 1px 5px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    font-size: 10px;
    font-family: inherit;
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
    :root {
        --sidebar-width: 220px;
    }

    #detail-panel {
        width: 300px;
    }

    .logo span {
        display: none;
    }
}

@media (max-width: 640px) {
    #sidebar {
        display: none;
    }

    #detail-panel {
        width: 100%;
    }

    .stats {
        display: none;
    }
}

/* ─── Animations ──────────────────────────────────────────────────────────── */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGold {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
}

.node-constant .node-shape {
    animation: pulseGold 3s ease-in-out infinite;
}

/* ─── KaTeX Overrides ─────────────────────────────────────────────────────── */

.katex {
    color: var(--text-primary);
}

/* ─── Equation KaTeX Labels (foreignObject) ───────────────────────────────── */

.eq-fo {
    overflow: visible !important;
}

.eq-label-katex {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 200px;
    pointer-events: none;
}

.eq-label-katex .katex {
    font-size: 9px !important;
    color: rgba(224, 228, 236, 0.8);
    white-space: nowrap;
    text-shadow: 0 0 8px rgba(0,0,0,0.8), 0 0 2px rgba(0,0,0,1);
}

.eq-label-katex .katex-html {
    white-space: nowrap;
}

/* Variable Symbol Labels */

.variable-label {
    text-shadow: 0 0 6px rgba(0,0,0,0.9), 0 0 2px rgba(0,0,0,1);
}

/* ─── Zoom Level Indicator ────────────────────────────────────────────────── */

.zoom-hint {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ═══════════════════════════════════════════════════════════════════════════ */
/* Accuracy & Correctness System                                             */
/* ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Accuracy Ring Animations ────────────────────────────────────────────── */

.accuracy-ring.accuracy-exact {
    animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { stroke-opacity: 0.3; }
    50% { stroke-opacity: 0.7; }
}

.accuracy-ring.accuracy-approx {
    opacity: 0.8;
}

.approx-badge {
    text-shadow: 0 0 4px rgba(0,0,0,0.9);
}

/* ─── Generalizes Links ───────────────────────────────────────────────────── */

.link-generalizes {
    stroke: rgba(255, 140, 0, 0.6);
    stroke-dasharray: 6, 3;
}

/* ─── Equivalent Links ────────────────────────────────────────────────────── */

.link-equivalent {
    stroke: rgba(0, 210, 255, 0.6);
}

/* ─── Incompatible Links ──────────────────────────────────────────────────── */

.link-incompatible {
    stroke: rgba(255, 60, 60, 0.55);
    stroke-dasharray: 3, 3;
}

/* ─── Legend: Generalizes line ─────────────────────────────────────────────── */

.legend-line.generalizes {
    display: inline-block;
    width: 20px;
    height: 0;
    border-top: 2px dashed #FF8C00;
    vertical-align: middle;
    margin-right: 4px;
}

.legend-line.equivalent {
    display: inline-block;
    width: 20px;
    height: 0;
    border-top: 2px solid #00D2FF;
    vertical-align: middle;
    margin-right: 4px;
}

.legend-line.incompatible {
    display: inline-block;
    width: 20px;
    height: 0;
    border-top: 2px dotted #FF3C3C;
    vertical-align: middle;
    margin-right: 4px;
}

.legend-line.derives-from {
    display: inline-block;
    width: 20px;
    height: 0;
    border-top: 2px dashed #00c878;
    vertical-align: middle;
    margin-right: 4px;
}

.legend-line.component-of {
    display: inline-block;
    width: 20px;
    height: 0;
    border-top: 2px solid #B482FF;
    vertical-align: middle;
    margin-right: 4px;
}

/* ─── Tooltip Accuracy ─────────────────────────────────────────────────────── */

.tooltip-level {
    font-size: 11px;
    font-weight: 600;
    margin: 2px 0;
}

.tooltip-domain {
    font-size: 10px;
    color: var(--text-secondary);
    margin: 2px 0 4px 0;
}

.tooltip-domain .katex {
    font-size: 10px !important;
    color: var(--text-secondary);
}

/* ─── Sidebar: Form Mode ──────────────────────────────────────────────────── */

#form-modes label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
}

#form-modes input[type="radio"] {
    accent-color: var(--accent-blue);
}

.form-hint {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 6px;
    font-style: italic;
}

/* ─── Sidebar: Accuracy Controls ──────────────────────────────────────────── */

.toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
}

.toggle-label input[type="checkbox"] {
    accent-color: var(--accent-blue);
}

.conn-mode-group {
    margin: 6px 0 4px 0;
    padding: 6px 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.conn-mode-group .legend-group-label {
    margin-bottom: 4px;
}

.conn-mode-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 0;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
}

.conn-mode-group input[type="radio"] {
    accent-color: var(--accent-blue);
}

/* Simulation Physics Sliders */
.sim-sliders {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sim-slider-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sim-slider-row label {
    flex: 0 0 85px;
    font-size: 11px;
    color: var(--text-secondary);
}

.sim-slider-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.sim-slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: none;
    cursor: pointer;
}

.sim-slider-row input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: none;
    cursor: pointer;
}

.sim-val {
    flex: 0 0 36px;
    font-size: 10px;
    color: var(--accent-blue);
    text-align: right;
    font-family: 'SF Mono', monospace;
}

.sim-reset-btn {
    margin-top: 4px;
    padding: 4px 10px;
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.sim-reset-btn:hover {
    background: var(--accent-blue);
    color: #fff;
}

.accuracy-legend {
    margin-top: 10px;
    padding: 8px 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.accuracy-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 3px 0;
    font-size: 11px;
    color: var(--text-secondary);
}

.al-icon {
    width: 18px;
    text-align: center;
    font-weight: bold;
}

.al-icon.al-postulate { color: #FFD700; }
.al-icon.al-derived { color: #e0e4ec; }
.al-icon.al-solution { color: #00e676; }
.al-icon.al-approx { color: #FF8C00; }
.al-icon.al-empirical { color: #FF6B9D; }
.al-icon.al-definition { color: #8892a4; }
.al-icon.al-link {
    color: #FF8C00;
    font-size: 10px;
    letter-spacing: -1px;
}
.al-icon.al-equiv {
    color: #00D2FF;
    font-size: 10px;
    letter-spacing: -1px;
}
.al-icon.al-incompat {
    color: #FF3C3C;
    font-size: 10px;
    letter-spacing: -1px;
}
.al-icon.al-derives {
    color: #00c878;
    font-size: 10px;
    letter-spacing: -1px;
}
.al-icon.al-component {
    color: #B482FF;
    font-size: 10px;
    letter-spacing: -1px;
}

.legend-group-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
    margin-bottom: 2px;
    font-weight: 600;
}

/* ─── Detail Panel: Accuracy & Forms ──────────────────────────────────────── */

.detail-accuracy {
    background: rgba(100, 120, 160, 0.06);
    border: 1px solid rgba(100, 120, 160, 0.15);
    border-radius: 8px;
    padding: 12px 14px !important;
}

.status-note {
    font-size: 11px;
    font-style: italic;
    color: var(--text-secondary);
    margin: 6px 0;
    padding-left: 8px;
    border-left: 2px solid rgba(255, 255, 255, 0.1);
}

.derives-section, .component-section {
    margin-top: 8px;
}

.derives-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s;
}

.derives-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.derives-arrow {
    color: #00c878;
    font-weight: bold;
}

.derives-name {
    color: var(--text-primary);
}

.derives-assuming {
    font-size: 10px;
    color: var(--text-muted);
    font-style: italic;
}

.chain-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    width: 100%;
}

.chip.chip-system {
    background: rgba(180, 130, 255, 0.15);
    color: #B482FF;
    border: 1px solid rgba(180, 130, 255, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s;
}

.chip.chip-system:hover {
    background: rgba(180, 130, 255, 0.25);
}

.component-siblings {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.accuracy-level {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
}

.accuracy-domain {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.accuracy-domain .katex {
    font-size: 12px !important;
}

.accuracy-chain {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    padding: 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

.chain-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: background 0.15s;
}

.chain-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.chain-item.chain-current {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: default;
}

.chain-level {
    font-size: 12px;
}

.chain-name {
    color: var(--text-primary);
}

.chain-arrow {
    color: var(--text-muted);
    margin: 0 2px;
    font-size: 13px;
}

/* ─── Detail Panel: Alternative Forms ─────────────────────────────────────── */

.detail-forms {
    background: rgba(74, 144, 217, 0.05);
    border: 1px solid rgba(74, 144, 217, 0.15);
    border-radius: 8px;
    padding: 12px 14px !important;
}

.form-item {
    margin: 10px 0;
    padding: 8px 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    border-left: 2px solid var(--accent-blue);
}

.form-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-equation {
    text-align: center;
    padding: 4px 0;
}

.form-equation .katex {
    font-size: 16px !important;
}

.form-note {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-style: italic;
}

/* ─── Timeline Slider ──────────────────────────────────────────────────── */

.timeline-control {
    padding: 4px 0;
}

#timeline-slider {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: linear-gradient(to right, #4a2c6b, #1a73e8, #00e676);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    margin: 8px 0 4px;
}

#timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid #1a73e8;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(26, 115, 232, 0.5);
    transition: box-shadow 0.2s;
}

#timeline-slider::-webkit-slider-thumb:hover {
    box-shadow: 0 0 14px rgba(26, 115, 232, 0.8);
}

#timeline-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid #1a73e8;
    cursor: pointer;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4px;
}

#timeline-year {
    font-size: 15px;
    font-weight: 700;
    color: #e0e4ea;
    font-variant-numeric: tabular-nums;
}

#timeline-reset {
    padding: 2px 8px;
    font-size: 12px;
}

.timeline-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.timeline-controls-row {
    margin-top: 6px;
    display: flex;
    gap: 6px;
}

.timeline-controls-row .field-control-btn {
    flex: 1;
}

/* ─── Bridge View ──────────────────────────────────────────────────────── */

.bridge-badge {
    font-size: 8px;
    fill: #fff;
    font-weight: bold;
    pointer-events: none;
    text-anchor: middle;
    dominant-baseline: central;
}

.bridge-ring {
    fill: none;
    stroke-width: 2;
    stroke-dasharray: 4,2;
    animation: bridgePulse 2s ease-in-out infinite;
}

@keyframes bridgePulse {
    0%, 100% { stroke-opacity: 0.4; }
    50% { stroke-opacity: 1; }
}

/* ─── Minimap ──────────────────────────────────────────────────────────── */

#minimap {
    position: absolute;
    bottom: 40px;
    right: 12px;
    width: 160px;
    height: 120px;
    background: rgba(15, 17, 23, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    overflow: hidden;
    pointer-events: all;
    cursor: grab;
    z-index: 50;
}

#minimap:active {
    cursor: grabbing;
}

#minimap svg {
    width: 100%;
    height: 100%;
}

.minimap-viewport {
    fill: rgba(26, 115, 232, 0.12);
    stroke: rgba(26, 115, 232, 0.6);
    stroke-width: 1.5;
}

/* ─── Multi-Select & Path Highlight ────────────────────────────────────── */

g.node.multi-selected circle.node-shape,
g.node.multi-selected polygon {
    stroke: #FFD700 !important;
    stroke-width: 3 !important;
    filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.6));
}

/* ─── Data Quality Panel ───────────────────────────────────────────────── */

.dq-score {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}

.dq-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 6px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    color: var(--text-secondary);
    transition: background 0.15s;
}

.dq-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.dq-icon {
    font-size: 12px;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.dq-label {
    flex: 1;
}

.dq-count {
    font-size: 10px;
    background: rgba(255, 60, 60, 0.2);
    color: #ff6b6b;
    padding: 1px 6px;
    border-radius: 8px;
    font-weight: 600;
    min-width: 18px;
    text-align: center;
}

.dq-badge {
    pointer-events: none;
}