/* ============================================================
   AI & Labor Dashboard — Dark-First Theme
   Adapted from genome-explorer-v3-heatmap
   ============================================================ */

/* --- Design Tokens --- */
:root {
    --bg-primary: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #1e293b;
    --border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #94a3b8;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --z-sticky: 10;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: 0.2s ease;
}

/* --- Light Theme Overrides --- */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-input: #ffffff;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent: #4f46e5;
    --accent-light: #6366f1;
    --accent-glow: rgba(79, 70, 229, 0.1);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Header --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: calc(var(--z-sticky) + 2);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    backdrop-filter: blur(12px);
}

.header-title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.header-subtitle {
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.theme-toggle {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: background var(--transition), border-color var(--transition);
    white-space: nowrap;
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* --- Tab Navigation --- */
.tab-nav {
    position: sticky;
    top: 0;
    z-index: calc(var(--z-sticky) + 1);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.tab-nav::-webkit-scrollbar {
    height: 3px;
}

.tab-nav::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition);
    flex-shrink: 0;
}

.tab-btn:hover {
    color: var(--text-secondary);
}

.tab-btn.active {
    color: var(--accent-light);
    border-bottom-color: var(--accent);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

/* --- Main Content --- */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* --- Tab Panes --- */
.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* --- KPI Grid --- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    text-align: center;
    transition: background var(--transition), border-color var(--transition);
}

.kpi-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
}

.kpi-label {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.35rem;
}

.kpi-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-light);
    line-height: 1.2;
}

.kpi-detail {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* --- Chart Cards --- */
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.chart-container {
    width: 100%;
    height: 350px;
    min-height: 200px;
}

.chart-container.chart-sm {
    height: 250px;
}

.chart-container.chart-tall {
    height: 500px;
}

.chart-container.chart-xl {
    height: 600px;
}

.chart-container.chart-heatmap {
    height: 700px;
}

/* --- Finding Cards --- */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.finding-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    transition: background var(--transition);
}

.finding-card:hover {
    background: var(--bg-card-hover);
}

.finding-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    color: var(--accent-light);
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 50%;
}

.finding-body {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* --- Narrative Box --- */
.narrative-box {
    background: var(--accent-glow);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.65;
}

.narrative-box strong {
    color: var(--accent-light);
}

/* --- Toggle Button Groups --- */
.heatmap-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
    align-items: center;
}

.toggle-group {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.toggle-group-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    align-items: center;
}

.toggle-btn {
    background: var(--bg-card);
    border: none;
    border-right: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.toggle-btn:last-child {
    border-right: none;
}

.toggle-btn:hover {
    background: var(--bg-card-hover);
    color: var(--text-secondary);
}

.toggle-btn.active {
    background: var(--accent);
    color: #fff;
}

.toggle-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

/* --- Sub-Nav Pills --- */
.sub-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.sub-nav-pill {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    padding: 0.35rem 0.85rem;
    cursor: pointer;
    transition: all var(--transition);
}

.sub-nav-pill:hover {
    border-color: var(--accent);
    color: var(--text-secondary);
}

.sub-nav-pill.active {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent-light);
}

.sub-nav-pill:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* --- Grid Layouts --- */
.chart-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.chart-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

/* --- Section Spacing --- */
.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    max-width: 72ch;
    line-height: 1.6;
}

/* --- Data Source Badge --- */
.data-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.data-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
}

/* --- Accessibility: Focus Visible --- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* --- Skip Link --- */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 1000;
    font-size: 0.85rem;
    border-radius: 0 0 var(--radius) 0;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
}

/* --- Responsive --- */
@media (max-width: 1100px) {
    .kpi-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.75rem 1rem;
    }

    .header-title {
        font-size: 1.1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .chart-grid-2,
    .chart-grid-3 {
        grid-template-columns: 1fr;
    }

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

    .heatmap-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .toggle-group {
        width: 100%;
    }

    .toggle-btn {
        flex: 1;
        text-align: center;
    }

    .chart-container.chart-heatmap {
        height: 500px;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .kpi-card {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        text-align: left;
    }

    .kpi-label {
        margin-bottom: 0;
    }
}

/* --- Print --- */
@media print {
    :root {
        --bg-primary: #fff;
        --bg-card: #fff;
        --border: #dee2e6;
        --text-primary: #212529;
        --text-secondary: #495057;
        --text-muted: #6c757d;
    }

    body {
        background: #fff;
        color: #212529;
        font-size: 11pt;
    }

    .site-header {
        position: static;
        border-bottom: 2px solid #212529;
    }

    .tab-nav,
    .theme-toggle,
    .skip-link,
    .heatmap-controls {
        display: none !important;
    }

    .tab-pane {
        display: block !important;
        break-before: page;
    }

    .chart-card,
    .finding-card,
    .kpi-card,
    .narrative-box {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #dee2e6;
    }

    .chart-container {
        height: 300px !important;
    }

    .chart-container.chart-heatmap {
        height: 500px !important;
    }

    .kpi-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .chart-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   PROJECT EXPLAINER & SURVEILLANCE CALLOUT (v13)
   ============================================ */
.explainer-card {
    max-width: 1200px;
    margin: 0.75rem auto;
    padding: 0.85rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.55;
}

.explainer-card strong {
    color: var(--text-primary);
}

.surveillance-callout {
    max-width: 1200px;
    margin: 0 auto 0.75rem;
    padding: 0 1rem;
}

.surveillance-callout summary {
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    background: var(--bg-card);
}

.surveillance-callout .callout-body {
    padding: 0.85rem 1rem;
    border: 1px solid var(--warning);
    border-top: none;
    border-radius: 0 0 var(--radius) var(--radius);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.6;
}

.surveillance-callout .callout-body p {
    margin-bottom: 0.5rem;
}

.surveillance-callout .callout-residual {
    font-style: italic;
    color: var(--text-muted);
    font-size: 0.78rem;
}

/* Inline glossary tooltips (AC2) */
abbr[title] {
    text-decoration: underline dotted var(--accent-light);
    text-underline-offset: 2px;
    cursor: help;
}

/* ============================================
   ANNOTATIONS
   ============================================ */
.annotations-container {
    margin: 0.75rem 0 1.25rem;
}

.annotation-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid #6366f1;
    border-radius: 6px;
    padding: 0.85rem 1rem;
    margin-bottom: 0.65rem;
}

.annotation-perspective {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.35rem;
}

.annotation-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.55;
    margin: 0;
}

.annotation-toggle {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.25rem 0 0;
    font-family: var(--font-sans);
}

.annotation-toggle:hover {
    text-decoration: underline;
}

.annotation-detail {
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.5;
    margin: 0.5rem 0 0;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    body {
        background: white !important;
        color: #1e293b !important;
    }

    .tab-nav, .toggle-group, footer, .annotation-toggle {
        display: none !important;
    }

    .tab-pane {
        display: block !important;
        page-break-inside: avoid;
    }

    .chart-card {
        break-inside: avoid;
        border: 1px solid #e2e8f0;
        box-shadow: none;
    }

    .annotation-card {
        border-color: #e2e8f0;
        background: #f8fafc;
    }

    .annotation-detail {
        display: block !important;
    }

    .kpi-card {
        background: #f8fafc;
        border: 1px solid #e2e8f0;
    }
}