/* ═══════════════════════════════════════════════════════
   HAL Reliability Dashboard — Custom Design System
   ═══════════════════════════════════════════════════════ */

/* ── Light theme ── */
[data-theme="light"] {
    --bg-primary: #fafaf8;
    --bg-card: #ffffff;
    --bg-card-hover: #f5f5f3;
    --bg-stat-gradient: #f0f0ed;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --accent: #1d4ed8;
    --accent-hover: #2563eb;
    --accent-subtle: rgba(29, 78, 216, 0.06);
    --table-hover-bg: rgba(0, 0, 0, 0.02);
    --chart-grid: rgba(0, 0, 0, 0.06);
    --chart-tick: #6b7280;
    --chart-label: #374151;
    --shadow-card: rgba(0, 0, 0, 0.04);
    --shadow-card-hover: rgba(0, 0, 0, 0.08);
    --code-bg: #f3f4f6;
    --selection-bg: rgba(29, 78, 216, 0.15);
}

/* ── Dark theme ── */
[data-theme="dark"] {
    --bg-primary: #111318;
    --bg-card: #1a1d24;
    --bg-card-hover: #22262f;
    --bg-stat-gradient: #1e2129;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text-primary: #e8e8e6;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --accent: #6b9aff;
    --accent-hover: #93b4ff;
    --accent-subtle: rgba(107, 154, 255, 0.08);
    --table-hover-bg: rgba(255, 255, 255, 0.02);
    --chart-grid: rgba(255, 255, 255, 0.06);
    --chart-tick: #9ca3af;
    --chart-label: #d1d5db;
    --shadow-card: rgba(0, 0, 0, 0.2);
    --shadow-card-hover: rgba(0, 0, 0, 0.35);
    --code-bg: #22262f;
    --selection-bg: rgba(107, 154, 255, 0.2);
}

/* ── Theme-aware logo visibility ── */
.logo-dark  { display: none; }
.logo-light { display: none; }
[data-theme="dark"]  .logo-dark  { display: inline; }
[data-theme="light"] .logo-light { display: inline; }

/* ── Selection ── */
::selection {
    background: var(--selection-bg);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ══════════════════════════════════════════
   BASE
   ══════════════════════════════════════════ */

body {
    font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
    font-size: 0.9375rem;
    line-height: 1.6;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'DM Sans', system-ui, sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--accent-hover);
}

/* ══════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════ */

.navbar {
    background: color-mix(in srgb, var(--bg-primary) 85%, transparent) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: var(--border) !important;
    transition: background 0.3s ease;
    z-index: 1030;
    padding-top: 0;
    padding-bottom: 0;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: -0.02em;
}
.navbar-brand, [data-theme="light"] .navbar-brand { color: #1a1a1a; }
[data-theme="dark"] .navbar-brand { color: #e8e8e6; }

.navbar .nav-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    transition: color 0.15s ease;
    position: relative;
}
.navbar .nav-link:hover,
.navbar .nav-link:focus {
    color: var(--text-primary);
}
.navbar .nav-link.active {
    color: var(--text-primary);
}

/* Subtle underline animation on nav links (skip dropdowns which use ::after for caret) */
.navbar .nav-link:not(.dropdown-toggle)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0.75rem;
    right: 0.75rem;
    height: 1.5px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}
.navbar .nav-link:not(.dropdown-toggle):hover::after {
    transform: scaleX(1);
}

/* Hover-open dropdowns on desktop */
@media (min-width: 992px) {
    .navbar .nav-item.dropdown:hover > .dropdown-menu {
        display: block;
        margin-top: 0;
    }
}

/* Dropdown caret: smaller, more subtle */
.navbar .dropdown-toggle::after {
    border-top-width: 0.25em;
    border-right-width: 0.25em;
    border-left-width: 0.25em;
    opacity: 0.4;
    vertical-align: 0.15em;
}

.navbar-toggler {
    border-color: var(--border);
}

/* ── Partner logos in navbar ── */
.nav-partner-logos {
    gap: 1rem;
}
.nav-partner-logos a {
    display: flex;
    align-items: center;
}
.nav-partner-logos img {
    height: 28px;
    opacity: 1;
}
.nav-separator {
    display: inline-block;
    width: 1px;
    height: 20px;
    background: var(--border-strong);
    margin-right: 0.5rem;
}

/* ── Provider logos inline ── */
.provider-logo {
    height: 1em;
    width: 1em;
    vertical-align: -0.1em;
    margin-right: 0.3em;
    display: inline-block;
}
[data-theme="dark"] .provider-logo.logo-invert {
    filter: invert(1);
}

/* ══════════════════════════════════════════
   DROPDOWNS
   ══════════════════════════════════════════ */

.dropdown-menu {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 8px 24px var(--shadow-card-hover);
    padding: 0.375rem;
    min-width: 10rem;
}
.dropdown-item {
    color: var(--text-primary);
    font-size: 0.875rem;
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
}
.dropdown-item:hover,
.dropdown-item:focus {
    background: var(--accent-subtle);
    color: var(--accent);
}

/* ══════════════════════════════════════════
   CARDS
   ══════════════════════════════════════════ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
    box-shadow: 0 1px 3px var(--shadow-card);
}
.card:hover {
    /* Subtle — no transform, just border change */
}
.benchmark-card:hover {
    border-color: var(--border-strong);
    box-shadow: 0 2px 8px var(--shadow-card-hover);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem;
}
.card-header h5,
.card-header h6 {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 0;
}

.card-body {
    padding: 1rem 1.25rem;
}

/* ══════════════════════════════════════════
   STAT CARDS
   ══════════════════════════════════════════ */

.stat-card {
    border: none;
    background: var(--bg-stat-gradient);
}
.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.03em;
}
.stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ══════════════════════════════════════════
   HERO SECTION
   ══════════════════════════════════════════ */

/* Offset anchor scrolls for sticky navbar */
[id] {
    scroll-margin-top: 80px;
}

.hero-section {
    padding: 1rem 0 0.5rem;
}
.hero-sidebar {
    text-align: center;
}
.hero-title {
    font-family: 'Source Serif 4', 'Georgia', serif;
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    line-height: 1.15;
    /* No gradient — solid color for a cleaner academic feel */
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
}
.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.65;
}
.hero-stat-card {
    background: var(--bg-stat-gradient);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.75rem 1.25rem;
    text-align: center;
}
.hero-stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
    /* No gradient text */
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
}
.hero-stat-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}
.hero-insight {
    font-size: 0.92rem;
    color: var(--text-secondary);
    border-left: 2px solid var(--accent);
    padding-left: 0.75rem;
}

/* ══════════════════════════════════════════
   TABLES
   ══════════════════════════════════════════ */

.table {
    --bs-table-bg: transparent;
    --bs-table-hover-bg: var(--table-hover-bg);
    color: var(--text-primary);
    font-size: 0.875rem;
}
.table th {
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    color: var(--text-secondary);
    border-color: var(--border);
    border-bottom-width: 1px;
    white-space: nowrap;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    /* No uppercase — cleaner feel */
    text-transform: none;
}
.table td {
    border-color: var(--border);
    vertical-align: middle;
    padding-top: 0.6rem;
    padding-bottom: 0.6rem;
}
.table a {
    color: var(--accent);
}
.table a:hover {
    color: var(--accent-hover);
}

/* ══════════════════════════════════════════
   METRIC BADGES
   ══════════════════════════════════════════ */

.badge-metric {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 3px;
    font-weight: 500;
    font-size: 0.78rem;
    color: #fff;
    background: #6b7280;
    font-variant-numeric: tabular-nums;
}
.badge-overall {
    background: var(--accent) !important;
    font-weight: 600;
}

/* ══════════════════════════════════════════
   LEADERBOARD TABLE (expanded metrics)
   ══════════════════════════════════════════ */

.leaderboard-table {
    font-size: 0.78rem;
    white-space: nowrap;
}
.leaderboard-table th,
.leaderboard-table td {
    padding: 0.35rem 0.45rem;
    text-align: center;
    vertical-align: middle;
}
.leaderboard-group-row th:nth-child(2),
.leaderboard-table td:nth-child(2) {
    text-align: left;
}
.leaderboard-group-row th:not([rowspan]) {
    border-bottom: none !important;
    padding-bottom: 0.15rem;
}
.leaderboard-group-header {
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.01em;
    border-left: 2px solid var(--border-strong) !important;
}
.leaderboard-sub-row th {
    font-weight: 500;
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding-top: 0.15rem;
    padding-bottom: 0.15rem;
}
.leaderboard-dim-col {
    border-left: 2px solid var(--border-strong) !important;
    font-weight: 600 !important;
}
.leaderboard-table .badge-metric {
    font-size: 0.72rem;
    padding: 1px 5px;
}
.leaderboard-table .sortable {
    cursor: pointer;
    user-select: none;
    position: relative;
}
.leaderboard-table .sortable:hover {
    background: var(--accent-subtle);
}
.leaderboard-table .sortable::after {
    content: '\2195';
    position: absolute;
    right: 1px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.2;
    font-size: 0.6rem;
}
.leaderboard-table .sortable.sort-asc::after {
    content: '\25B2';
    opacity: 0.6;
    font-size: 0.55rem;
}
.leaderboard-table .sortable.sort-desc::after {
    content: '\25BC';
    opacity: 0.6;
    font-size: 0.55rem;
}

/* ══════════════════════════════════════════
   TREND STAT CHIPS
   ══════════════════════════════════════════ */

.trend-stats {
    display: inline-flex;
    gap: 6px;
    justify-content: center;
    flex-wrap: wrap;
}
.trend-stat {
    display: inline-flex;
    align-items: center;
    border-radius: 4px;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    overflow: hidden;
}
.trend-stat-label {
    padding: 2px 5px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: lowercase;
    letter-spacing: 0.02em;
}
.trend-stat-value {
    padding: 2px 6px 2px 4px;
    font-weight: 500;
    color: var(--text-primary);
    font-family: 'DM Sans', monospace;
}

/* ══════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════ */

.btn-outline-primary {
    color: var(--accent);
    border-color: var(--border-strong);
    background: transparent;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 5px;
    padding: 0.35rem 0.9rem;
    transition: all 0.15s ease;
}
.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--accent);
}

.btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-strong);
    background: transparent;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 5px;
    padding: 0.35rem 0.9rem;
    transition: all 0.15s ease;
}
.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background: var(--table-hover-bg);
    border-color: var(--border-strong);
    color: var(--text-primary);
}

/* ══════════════════════════════════════════
   THEME TOGGLE
   ══════════════════════════════════════════ */

.theme-toggle {
    background: none;
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    width: 2rem;
    padding: 6px 0;
    cursor: pointer;
    color: var(--text-tertiary);
    font-size: 1.1rem;
    line-height: 1;
    text-align: center;
    transition: color 0.15s ease, background 0.15s ease;
}
.theme-toggle:hover {
    color: var(--accent);
    background: var(--accent-subtle);
}

/* ══════════════════════════════════════════
   BREADCRUMBS
   ══════════════════════════════════════════ */

.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 0;
    font-size: 0.82rem;
}
.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: var(--text-tertiary);
    font-weight: 400;
}
.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
}
.breadcrumb-item a:hover {
    color: var(--accent);
}
.breadcrumb-item.active {
    color: var(--text-tertiary);
}

/* ══════════════════════════════════════════
   NAV PILLS (dimension navigation)
   ══════════════════════════════════════════ */

.nav-pills {
    gap: 0.5rem;
}
.nav-pills .nav-link {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 4px;
    padding: 0.4rem 0.85rem;
    transition: all 0.15s ease;
    background: transparent;
    border: 1px solid transparent;
}
.nav-pills .nav-link:hover {
    color: var(--text-primary);
    background: var(--accent-subtle);
}
.nav-pills .nav-link.active {
    color: var(--accent);
    background: var(--accent-subtle);
    border-color: var(--accent);
    font-weight: 600;
}

/* ══════════════════════════════════════════
   FORM CONTROLS
   ══════════════════════════════════════════ */

.form-select {
    background-color: var(--bg-card);
    border-color: var(--border);
    color: var(--text-primary);
    font-size: 0.8125rem;
    border-radius: 5px;
    padding: 0.3rem 2rem 0.3rem 0.6rem;
    transition: border-color 0.15s ease;
}
.form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

/* ══════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════ */

footer {
    border-color: var(--border) !important;
    color: var(--text-tertiary);
    padding: 1.5rem 0;
    font-size: 0.82rem;
}

/* ══════════════════════════════════════════
   MODAL (Citation)
   ══════════════════════════════════════════ */

.modal-content {
    background: var(--bg-card);
    border-color: var(--border);
    color: var(--text-primary);
    border-radius: 8px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}
.modal-header {
    border-color: var(--border);
}
.bibtex-block,
pre {
    background: var(--code-bg) !important;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.8rem;
}

/* ══════════════════════════════════════════
   FINDINGS PAGE
   ══════════════════════════════════════════ */

.finding-card {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.finding-card:hover {
    border-color: var(--border-strong);
    box-shadow: 0 4px 16px var(--shadow-card-hover);
}
.finding-icon-wrap {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}
.finding-title {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
}
.finding-body {
    font-size: 0.9rem;
    line-height: 1.6;
}
.finding-detail {
    font-size: 0.82rem;
    line-height: 1.5;
}

/* ══════════════════════════════════════════
   INFO POPOVERS
   ══════════════════════════════════════════ */

.info-pop {
    cursor: help;
    opacity: 0.4;
    transition: opacity 0.15s;
    vertical-align: middle;
}
.info-pop:hover {
    opacity: 0.8;
}

.popover {
    --bs-popover-bg: var(--bg-card);
    --bs-popover-border-color: var(--border);
    --bs-popover-body-color: var(--text-primary);
    border-radius: 6px;
    box-shadow: 0 8px 24px var(--shadow-card-hover);
    font-size: 0.82rem;
}

/* ══════════════════════════════════════════
   HEADING ACCENTS
   ══════════════════════════════════════════ */

h2 .text-primary {
    color: var(--accent) !important;
}

/* ══════════════════════════════════════════
   METHODOLOGY PAGE
   ══════════════════════════════════════════ */

#methodNav {
    overflow: hidden;
}
#methodNav .nav-link {
    color: var(--text-secondary);
    padding: 4px 12px;
    margin-right: 16px;
    border-left: 2px solid transparent;
    font-size: 0.82rem;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
    border-radius: 0 4px 4px 0;
}
#methodNav .nav-link:hover {
    color: var(--text-primary);
    background: var(--accent-subtle);
}
#methodNav .nav-link.active {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 600;
}

/* ── KaTeX equations: horizontal scroll on overflow ── */
.katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}