/* AI Regulation Reference - Styles */
/* WCAG 2.1 AA Compliant (4.5:1 contrast ratio minimum) */

/* ========================================
   ACCESSIBILITY & MOTION
   ======================================== */

html {
    scroll-behavior: smooth;
}

.regulation-detail,
.obligation-detail,
.authority-detail,
.provision-card,
.timeline-entry {
    scroll-margin-top: 72px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #000;
    padding: 12px 24px;
    border-radius: 0 0 8px 8px;
    font-weight: 600;
    text-decoration: none;
    z-index: 1000;
    transition: top 0.2s;
}

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

/* ========================================
   CSS VARIABLES (DARK MODE DEFAULT)
   ======================================== */

:root {
    --bg-gradient-start: #1a1a2e;
    --bg-gradient-end: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-heading: #fff;
    --card-bg: #1e1e30;
    --card-border: #3a3a4a;
    --border: #3a3a4a;
    --input-bg: #252538;
    --accent: #4fc3f7;
    --accent-bg: #0f3460;
    --badge-bg: #2d2d44;

    /* Regulation status colors */
    --status-enforcing: #4caf50;
    --status-enforcing-text: #000;
    --status-enacted: #7c4dff;
    --status-enacted-text: #fff;
    --status-pending: #ff9800;
    --status-pending-text: #000;
    --status-phased: #e67700;
    --status-phased-text: #000;
    --status-proposed: #2196f3;
    --status-proposed-text: #fff;
    --status-voluntary: #607d8b;
    --status-voluntary-text: #fff;
    --status-repealed: #f44336;
    --status-repealed-text: #fff;

    /* Obligation group colors */
    --group-disclosure: #4fc3f7;
    --group-governance: #7c4dff;
    --group-fairness: #ff6e40;
    --group-accountability: #69f0ae;
    --group-compliance: #ffd740;
    --group-competence: #ea80fc;
    --group-security: #ff5252;

    /* Matrix */
    --matrix-covered: #2e7d32;
    --matrix-covered-text: #fff;
    --matrix-empty: var(--card-bg);
}

/* ========================================
   LIGHT MODE OVERRIDES
   ======================================== */

:is(html, body).light-mode {
    --bg-gradient-start: #f5f5f7;
    --bg-gradient-end: #e8e8ed;
    --text-primary: #2d2d2d;
    --text-secondary: #595959;
    --text-heading: #111;
    --card-bg: #fff;
    --card-border: #ccc;
    --border: #ccc;
    --input-bg: #f0f0f5;
    --accent: #0055aa;
    --accent-bg: #e6f2ff;
    --badge-bg: #e0e0e5;

    /* Status - light mode (WCAG compliant) */
    --status-enforcing: #1b7d1b;
    --status-enforcing-text: #fff;
    --status-enacted: #5e35b1;
    --status-enacted-text: #fff;
    --status-pending: #e65100;
    --status-pending-text: #fff;
    --status-phased: #c45500;
    --status-phased-text: #fff;
    --status-proposed: #0d47a1;
    --status-proposed-text: #fff;
    --status-voluntary: #455a64;
    --status-voluntary-text: #fff;
    --status-repealed: #c62828;
    --status-repealed-text: #fff;

    /* Group - light mode */
    --group-disclosure: #0277bd;
    --group-governance: #4527a0;
    --group-fairness: #bf360c;
    --group-accountability: #2e7d32;
    --group-compliance: #f57f17;
    --group-competence: #7b1fa2;
    --group-security: #c62828;

    /* Matrix */
    --matrix-covered: #2e7d32;
    --matrix-covered-text: #fff;
    --matrix-empty: #f5f5f5;
}

:is(html, body).light-mode header,
:is(html, body).light-mode .site-header {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

:is(html, body).light-mode .regulation-card:hover,
:is(html, body).light-mode .obligation-card:hover,
:is(html, body).light-mode .provision-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ========================================
   BASE STYLES
   ======================================== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    padding: 20px;
    line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding-top: 70px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h2 {
    font-size: 1.5rem;
    color: var(--text-heading);
    margin: 2rem 0 1rem;
}

h3 {
    font-size: 1.15rem;
    color: var(--text-heading);
    margin: 1.5rem 0 0.75rem;
}

/* ========================================
   HEADER
   ======================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 12px 20px;
    background: var(--bg-gradient-start);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.site-header h1 {
    font-size: 1.3rem;
    color: var(--text-heading);
    margin: 0;
}

.site-header h1 a {
    color: inherit;
    text-decoration: none;
}

.hamburger-btn {
    display: none;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 10px;
    cursor: pointer;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.hamburger-icon {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    left: 0;
    transition: transform 0.2s ease;
}

.hamburger-icon::before { top: -6px; }
.hamburger-icon::after { top: 6px; }

.hamburger-btn.active .hamburger-icon { background: transparent; }
.hamburger-btn.active .hamburger-icon::before { transform: rotate(45deg); top: 0; }
.hamburger-btn.active .hamburger-icon::after { transform: rotate(-45deg); top: 0; }

/* ========================================
   NAVIGATION
   ======================================== */

.site-nav {
    display: flex;
    gap: 4px;
    align-items: center;
}

.site-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.site-nav-link:hover {
    color: var(--text-heading);
    background: var(--input-bg);
    text-decoration: none;
}

.site-nav-link.active {
    color: var(--accent);
    background: var(--accent-bg);
}

.site-nav-link:focus,
.site-nav-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ========================================
   SEARCH
   ======================================== */

.site-search {
    position: relative;
}

.search-input {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    width: 180px;
    transition: all 0.2s;
}

.search-input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    width: 240px;
}

.search-results {
    position: absolute;
    top: 100%;
    right: 0;
    width: 320px;
    max-height: 400px;
    overflow-y: auto;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    margin-top: 4px;
    list-style: none;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 200;
}

.search-result-item {
    padding: 10px 14px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-bottom: 1px solid var(--border);
}

.search-result-item:last-child { border-bottom: none; }

.search-result-item:hover,
.search-result-item.active {
    background: var(--accent-bg);
}

.search-result-name {
    font-size: 0.9rem;
    color: var(--text-heading);
}

.search-result-type {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.search-no-results {
    padding: 14px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
}

/* ========================================
   THEME TOGGLE
   ======================================== */

.theme-toggle {
    background: var(--badge-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

/* ========================================
   STAT CARDS
   ======================================== */

.stats-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 1.5rem 0;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 16px 20px;
    flex: 1;
    min-width: 120px;
    text-align: center;
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    display: block;
}

.stat-card .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========================================
   STATUS BADGES
   ======================================== */

.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.status-badge.enforcing { background: var(--status-enforcing); color: var(--status-enforcing-text); }
.status-badge.enacted { background: var(--status-enacted); color: var(--status-enacted-text); }
.status-badge.pending,
.status-badge.pending-replacement { background: var(--status-pending); color: var(--status-pending-text); }
.status-badge.phased-enforcement { background: var(--status-phased); color: var(--status-phased-text); }
.status-badge.proposed { background: var(--status-proposed); color: var(--status-proposed-text); }
.status-badge.voluntary { background: var(--status-voluntary); color: var(--status-voluntary-text); }
.status-badge.repealed,
.status-badge.expired { background: var(--status-repealed); color: var(--status-repealed-text); }

/* ========================================
   GROUP BADGES
   ======================================== */

.group-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    color: #fff;
}

.group-badge.disclosure { background: var(--group-disclosure); }
.group-badge.governance { background: var(--group-governance); }
.group-badge.fairness { background: var(--group-fairness); }
.group-badge.accountability { background: var(--group-accountability); color: #000; }
.group-badge.compliance { background: var(--group-compliance); color: #000; }
.group-badge.competence { background: var(--group-competence); }
.group-badge.security { background: var(--group-security); }

/* ========================================
   CARDS (Shared)
   ======================================== */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
    margin: 1rem 0;
}

.regulation-card,
.obligation-card,
.authority-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 18px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.regulation-card:hover,
.obligation-card:hover,
.authority-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.card-title a {
    color: inherit;
    text-decoration: none;
}

.card-title a:hover {
    color: var(--accent);
}

.card-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
    align-items: center;
}

.card-meta .meta-item {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.coverage-bar {
    flex: 1;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    min-width: 60px;
    max-width: 120px;
}

.coverage-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.3s;
}

/* ========================================
   COUNTDOWN BAR
   ======================================== */

.countdown-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.countdown-card {
    flex: 1 1 200px;
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.countdown-card:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.countdown-card.urgent {
    border-left: 4px solid #e74c3c;
}

.countdown-card.soon {
    border-left: 4px solid #f39c12;
}

.countdown-card.later {
    border-left: 4px solid var(--accent);
}

.countdown-days {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
}

.countdown-card.urgent .countdown-days {
    color: #e74c3c;
}

.countdown-card.soon .countdown-days {
    color: #f39c12;
}

.countdown-label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 2px;
}

.countdown-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========================================
   VERIFIED BADGE
   ======================================== */

.verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(46, 204, 113, 0.15);
    color: #27ae60;
    font-weight: 500;
    white-space: nowrap;
}

.verified-badge::before {
    content: "\2713";
    font-weight: 700;
}

/* ========================================
   DATA TABLES
   ======================================== */

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.data-table th,
.data-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.data-table th {
    background: var(--input-bg);
    color: var(--text-heading);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--accent-bg);
}

.data-table a {
    color: var(--accent);
}

/* Sortable headers */
.data-table th[data-sortable] {
    cursor: pointer;
    user-select: none;
}

.data-table th[data-sortable]:hover {
    background: var(--accent-bg);
}

.th-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.th-label {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
}

.sort-arrow {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 5px solid currentColor;
    opacity: 0.3;
    transition: opacity 0.15s;
}

th[data-sortable]:hover .sort-arrow {
    opacity: 0.5;
}

th[aria-sort="ascending"] .sort-arrow {
    opacity: 1;
    color: var(--accent);
    border-bottom: 5px solid currentColor;
    border-top: none;
}

th[aria-sort="descending"] .sort-arrow {
    opacity: 1;
    color: var(--accent);
    border-top: 5px solid currentColor;
    border-bottom: none;
}

/* Inline column filters */
.th-filter {
    display: block;
    width: 100%;
    padding: 3px 6px;
    margin-top: 4px;
    font-size: 0.7rem;
    font-weight: 400;
    text-transform: none;
    letter-spacing: normal;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-heading);
    border-radius: 4px;
    cursor: pointer;
}

.th-filter:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.table-result-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.table-result-count strong {
    color: var(--accent);
}

/* ========================================
   PROVISION CARDS
   ======================================== */

.provision-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 20px;
    margin: 1rem 0;
}

.provision-card h3 {
    margin-top: 0;
    margin-bottom: 12px;
}

/* Anchor links on provision headings */
.anchor-link {
    opacity: 0;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.8em;
    font-weight: 400;
    margin-left: 4px;
    transition: opacity 0.15s;
}

.provision-card h3:hover .anchor-link,
.anchor-link:focus {
    opacity: 0.6;
}

.anchor-link:hover {
    opacity: 1;
    color: var(--accent);
}

/* Collapsible provision cards using <details> */
details.provision-card {
    cursor: default;
}

details.provision-card > summary {
    cursor: pointer;
    list-style: none;
    position: relative;
}

details.provision-card > summary::-webkit-details-marker {
    display: none;
}

details.provision-card > summary::after {
    content: "\25B6";
    position: absolute;
    right: 0;
    top: 0;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

details.provision-card[open] > summary::after {
    transform: rotate(90deg);
}

.provision-details {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.provision-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.provision-meta dt {
    font-weight: 600;
    color: var(--text-heading);
}

.provision-meta dd {
    margin: 0;
}

.talking-point {
    background: var(--accent-bg);
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    font-size: 0.85rem;
    font-style: italic;
    margin: 12px 0;
    line-height: 1.5;
    color: var(--text-primary);
}

.provision-sources {
    margin-top: 12px;
    font-size: 0.8rem;
}

.provision-sources a {
    color: var(--accent);
    margin-right: 12px;
}

/* ========================================
   OBLIGATION MATRIX
   ======================================== */

.matrix-wrapper {
    overflow-x: auto;
    margin: 1rem 0;
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.matrix-table {
    border-collapse: collapse;
    width: max-content;
    min-width: 100%;
}

.matrix-table th,
.matrix-table td {
    padding: 8px 12px;
    border: 1px solid var(--border);
    font-size: 0.8rem;
    text-align: center;
    white-space: nowrap;
}

.matrix-table thead th {
    background: var(--input-bg);
    color: var(--text-heading);
    font-weight: 600;
}

.matrix-table thead tr:first-child th {
    position: sticky;
    top: 0;
    z-index: 2;
}

.matrix-table thead tr:nth-child(2) th {
    position: sticky;
    top: 33px;
    z-index: 2;
}

.matrix-table .matrix-row-header {
    text-align: left;
    font-weight: 600;
    color: var(--text-heading);
    background: var(--card-bg);
    position: sticky;
    left: 0;
    z-index: 1;
    min-width: 180px;
    border-left: 3px solid var(--border);
}

.matrix-table .matrix-corner {
    position: sticky;
    left: 0;
    top: 0;
    z-index: 3;
    background: var(--input-bg);
}

.matrix-cell {
    cursor: default;
    transition: background 0.1s;
}

.matrix-cell.covered {
    background: var(--matrix-covered);
    color: var(--matrix-covered-text);
    font-weight: 600;
    cursor: pointer;
}

.matrix-cell.covered:hover {
    filter: brightness(1.2);
}

.matrix-cell.empty {
    background: var(--matrix-empty);
    color: var(--text-secondary);
}

.matrix-table .matrix-row-header.group-disclosure { border-left-color: var(--group-disclosure); }
.matrix-table .matrix-row-header.group-governance { border-left-color: var(--group-governance); }
.matrix-table .matrix-row-header.group-fairness { border-left-color: var(--group-fairness); }
.matrix-table .matrix-row-header.group-accountability { border-left-color: var(--group-accountability); }
.matrix-table .matrix-row-header.group-compliance { border-left-color: var(--group-compliance); }
.matrix-table .matrix-row-header.group-competence { border-left-color: var(--group-competence); }
.matrix-table .matrix-row-header.group-security { border-left-color: var(--group-security); }

.matrix-jurisdiction-header {
    background: var(--card-bg) !important;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
    border-bottom: 2px solid var(--accent);
    letter-spacing: 0.02em;
}

.matrix-reg-header {
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.matrix-reg-header a {
    color: var(--text-secondary);
    text-decoration: none;
}

.matrix-reg-header a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* ========================================
   TIMELINE
   ======================================== */

.timeline {
    margin: 1.5rem 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--card-border);
}

.timeline-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin: 1.5rem 0 0.5rem;
    padding-left: 48px;
}

.timeline-entry {
    position: relative;
    padding: 12px 12px 12px 48px;
    margin: 4px 0;
}

.timeline-entry::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 18px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--card-border);
    background: var(--bg-gradient-start);
}

.timeline-entry.past::before {
    background: var(--status-enforcing);
    border-color: var(--status-enforcing);
}

.timeline-entry.future::before {
    background: transparent;
    border-color: var(--accent);
}

.timeline-entry.today-marker::before {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.timeline-content {
    display: flex;
    gap: 8px;
    align-items: baseline;
    flex-wrap: wrap;
}

.timeline-regulation {
    font-weight: 600;
    color: var(--text-heading);
}

.timeline-milestone {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.timeline-jurisdiction {
    font-size: 0.7rem;
    padding: 1px 6px;
    border-radius: 8px;
    background: var(--badge-bg);
    color: var(--text-secondary);
}

/* ========================================
   COMPARE
   ======================================== */

.compare-selector {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.compare-selector label {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
}

.compare-selector label:hover {
    border-color: var(--accent);
}

.compare-selector input:checked + span {
    color: var(--accent);
}

.compare-selector label:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent-bg);
}

.compare-result {
    margin: 1.5rem 0;
}

.compare-section {
    margin: 1rem 0;
}

.compare-section h3 {
    margin-bottom: 8px;
}

.compare-list {
    list-style: none;
    padding: 0;
}

.compare-list li {
    padding: 8px 14px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    margin: 4px 0;
    font-size: 0.85rem;
}

.compare-list li a {
    color: var(--accent);
}

/* ========================================
   DETAIL PAGES
   ======================================== */

.detail-header {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 1.5rem;
}

.detail-header h2 {
    margin: 0 0 12px;
    font-size: 1.6rem;
}

.detail-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.detail-meta dt {
    font-weight: 600;
    color: var(--text-heading);
    display: inline;
}

.detail-meta dd {
    margin: 0;
    display: inline;
}

.detail-meta .meta-pair {
    display: flex;
    gap: 4px;
}

.breadcrumb {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb .sep {
    margin: 0 6px;
    color: var(--border);
}

/* ========================================
   BRIDGE PAGES
   ======================================== */

.bridge-header {
    text-align: center;
    padding: 2rem 0;
}

.bridge-header h2 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.bridge-header .bridge-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

.bridge-answer {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 24px;
    margin: 1.5rem 0;
    text-align: center;
}

.bridge-answer .answer-yes {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--status-enforcing);
}

.bridge-answer .answer-no {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.bridge-cta {
    display: inline-block;
    background: var(--accent);
    color: #000;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    margin: 8px 4px;
    transition: filter 0.15s;
}

.bridge-cta:hover {
    filter: brightness(1.1);
    text-decoration: none;
}

/* ========================================
   FILTERS
   ======================================== */

.filters,
.applicability-filters {
    display: flex;
    gap: 12px;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.filter-group select {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    color: var(--text-heading);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.filter-group select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.result-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 6px 12px;
    background: var(--badge-bg);
    border-radius: 6px;
}

.result-count strong { color: var(--accent); }

/* ========================================
   FOOTER
   ======================================== */

footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--card-border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

footer a {
    color: var(--accent);
}

footer p {
    margin: 8px 0;
}

.footer-social {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--badge-bg);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.footer-social:hover {
    background: var(--accent-bg);
    color: var(--accent);
    text-decoration: none;
}

/* ========================================
   BACK TO TOP
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 50;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:focus,
.back-to-top:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* ========================================
   ABOUT PAGE
   ======================================== */

.about-content {
    max-width: 720px;
}

.about-content p {
    margin: 1rem 0;
    line-height: 1.7;
}

.about-content ul {
    margin: 0.5rem 0 0.5rem 1.5rem;
}

.about-content li {
    margin: 4px 0;
    line-height: 1.5;
}

.api-endpoint {
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: var(--input-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* ========================================
   KEYBOARD SHORTCUTS
   ======================================== */

.keyboard-help-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.keyboard-help {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 32px;
    max-width: 360px;
    width: 90%;
}

.keyboard-help h3 {
    margin: 0 0 16px;
}

.keyboard-help dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px 16px;
    margin: 0;
}

.keyboard-help dt {
    text-align: right;
}

.keyboard-help dd {
    margin: 0;
    color: var(--text-secondary);
}

kbd {
    display: inline-block;
    padding: 2px 6px;
    font-family: inherit;
    font-size: 0.8rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    min-width: 20px;
    text-align: center;
}

.data-table tr.row-focus td {
    background: var(--accent-bg);
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

/* ========================================
   PRINT STYLESHEET
   ======================================== */

@media print {
    .site-header,
    .skip-link,
    .site-search,
    .theme-toggle,
    .hamburger-btn,
    .back-to-top,
    .footer-social,
    .keyboard-help-overlay {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .data-table,
    .matrix-table {
        font-size: 9pt;
    }

    .data-table tr {
        break-inside: avoid;
    }

    details.provision-card {
        break-inside: avoid;
    }

    details.provision-card[open] > summary::after {
        display: none;
    }

    /* Force all <details> open for print */
    details.provision-card {
        open: true;
    }

    details.provision-card > .provision-details {
        display: block !important;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.75em;
        color: #666;
        word-break: break-all;
    }

    a[href^="#"]::after,
    a[href^="javascript"]::after,
    .site-nav-link::after,
    .anchor-link::after {
        content: none;
    }

    .status-badge,
    .group-badge {
        border: 1px solid #999;
        color: black !important;
        background: white !important;
    }

    .th-filter {
        display: none;
    }

    .sort-arrow {
        display: none;
    }

    footer p:last-child {
        display: none;
    }
}

/* ========================================
   RESPONSIVE: TABLET (max-width: 900px)
   ======================================== */

@media (max-width: 900px) {
    .container { padding-top: 100px; }

    .site-header {
        padding: 10px 16px;
        gap: 6px;
    }

    .site-nav {
        flex-wrap: wrap;
        gap: 2px;
    }

    .site-nav-link {
        font-size: 0.8rem;
        padding: 4px 8px;
    }

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

    .matrix-table .matrix-row-header {
        min-width: 140px;
        font-size: 0.75rem;
    }

    .matrix-table th,
    .matrix-table td {
        padding: 6px 8px;
        font-size: 0.75rem;
    }
}

/* ========================================
   RESPONSIVE: MOBILE (max-width: 600px)
   ======================================== */

@media (max-width: 600px) {
    body {
        padding: 12px;
    }

    .container { padding-top: 60px; }

    .site-header {
        flex-wrap: nowrap;
        padding: 10px 12px;
        gap: 8px;
    }

    .site-header h1 {
        font-size: 1.05rem;
        flex-shrink: 1;
        min-width: 0;
        order: 1;
    }

    .hamburger-btn {
        display: flex;
        flex-shrink: 0;
        order: 4;
    }

    .header-actions {
        display: contents;
    }

    .header-actions .theme-toggle {
        display: none;
    }

    .site-search {
        flex: 1 1 0;
        min-width: 0;
        order: 2;
    }

    .site-search .search-input {
        width: 100%;
        font-size: 0.85rem;
        padding: 6px 8px;
    }

    .site-search .search-results {
        width: calc(100vw - 24px);
        left: auto;
        right: 0;
    }

    .site-header > nav.site-nav {
        display: none;
    }

    .site-header > nav.site-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-gradient-start);
        border-bottom: 1px solid var(--card-border);
        padding: 8px;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    }

    .site-nav.open .site-nav-link {
        padding: 12px 16px;
        font-size: 1rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .stats-bar {
        gap: 8px;
    }

    .stat-card {
        min-width: 90px;
        padding: 12px 14px;
    }

    .stat-card .stat-number {
        font-size: 1.5rem;
    }

    .detail-header {
        padding: 16px;
    }

    .detail-header h2 {
        font-size: 1.3rem;
    }

    .detail-meta {
        flex-direction: column;
        gap: 8px;
    }

    .provision-card {
        padding: 14px;
    }

    .data-table th,
    .data-table td {
        padding: 8px 10px;
        font-size: 0.8rem;
    }

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

    .filter-group select {
        width: 100%;
        min-height: 44px;
        padding: 10px 12px;
    }

    .bridge-header h2 {
        font-size: 1.3rem;
    }

    .compare-selector {
        flex-direction: column;
    }

    .compare-selector label {
        width: 100%;
    }

    .timeline-entry {
        padding-left: 40px;
    }
}