/* ============================================
   Research Intelligence — Observatory Theme

   Deep navy dark theme with luminous score
   indicators and editorial typography.
   ============================================ */

/* ─── Custom Properties ─── */
:root {
    --bg-deep: #060a13;
    --bg: #0b1121;
    --bg-card: #0f172a;
    --bg-surface: #1e293b;
    --bg-hover: #172554;

    --border: rgba(148, 163, 184, 0.08);
    --border-strong: rgba(148, 163, 184, 0.15);
    --border-accent: rgba(59, 130, 246, 0.4);

    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --text-dim: #334155;

    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-muted: rgba(59, 130, 246, 0.12);

    --emerald: #10b981;
    --emerald-glow: rgba(16, 185, 129, 0.2);
    --amber: #f59e0b;
    --amber-glow: rgba(245, 158, 11, 0.2);
    --red: #ef4444;
    --red-glow: rgba(239, 68, 68, 0.2);
    --purple: #a78bfa;
    --purple-glow: rgba(167, 139, 250, 0.15);

    --font-display: system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', Consolas, monospace;

    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.1);

    --nav-height: 56px;
}

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

* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-surface) transparent;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-surface); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

::selection {
    background: rgba(59, 130, 246, 0.3);
    color: var(--text);
}

/* ─── Base ─── */
body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    background-image:
        radial-gradient(ellipse 80% 60% at 15% -10%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 85% 110%, rgba(16, 185, 129, 0.04) 0%, transparent 60%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

/* ─── Page Loader (HTMX) ─── */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    z-index: 10000;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.15s;
}

.page-loader::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-hover), transparent);
    transform: translateX(-100%);
}

.htmx-request.page-loader,
.htmx-request .page-loader {
    opacity: 1;
}

.htmx-request.page-loader::after,
.htmx-request .page-loader::after {
    animation: loadSlide 1.2s ease-in-out infinite;
}

/* ─── Navigation ─── */
nav {
    background: rgba(11, 17, 33, 0.82);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 2.5rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--nav-height);
}

.logo {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.02em;
}

.logo-dot {
    width: 7px;
    height: 7px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px var(--accent), 0 0 14px rgba(59, 130, 246, 0.3);
    animation: pulse 3s ease-in-out infinite;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius);
    transition: color 0.15s, background 0.15s;
    position: relative;
}

.nav-links a:hover {
    color: var(--text-secondary);
    background: var(--accent-muted);
    text-decoration: none;
}

.nav-links a.active {
    color: var(--text);
    background: var(--accent-muted);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0.75rem;
    right: 0.75rem;
    height: 2px;
    background: var(--accent);
    border-radius: 1px 1px 0 0;
}

/* ─── Layout ─── */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.25;
}

.page-header .subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.35rem;
}

/* ─── Stats Grid (Dashboard) ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    position: relative;
    overflow: hidden;
    animation: fadeSlideUp 0.45s ease-out both;
}

.stat-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.5;
    border-radius: inherit;
    pointer-events: none;
}

.stat-card--blue { background: linear-gradient(145deg, rgba(59,130,246,0.08) 0%, var(--bg-card) 70%); }
.stat-card--red { background: linear-gradient(145deg, rgba(239,68,68,0.08) 0%, var(--bg-card) 70%); }
.stat-card--purple { background: linear-gradient(145deg, rgba(167,139,250,0.08) 0%, var(--bg-card) 70%); }
.stat-card--green { background: linear-gradient(145deg, rgba(16,185,129,0.08) 0%, var(--bg-card) 70%); }

.stat-card:nth-child(1) { animation-delay: 0s; }
.stat-card:nth-child(2) { animation-delay: 0.06s; }
.stat-card:nth-child(3) { animation-delay: 0.12s; }
.stat-card:nth-child(4) { animation-delay: 0.18s; }

.stat-card .label {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.stat-card .value {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: 0.5rem;
    letter-spacing: -0.02em;
}

.stat-card .value--small {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ─── Section Headers ─── */
.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ─── Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-full);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
}

.badge--accent { background: var(--accent-muted); color: var(--accent-hover); }
.badge--red { background: var(--red-glow); color: var(--red); }
.badge--emerald { background: var(--emerald-glow); color: var(--emerald); }
.badge--amber { background: var(--amber-glow); color: var(--amber); }
.badge--purple { background: var(--purple-glow); color: var(--purple); }

.badge-code {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.12rem 0.45rem;
    border-radius: var(--radius-full);
    background: var(--emerald-glow);
    color: var(--emerald);
    letter-spacing: 0.03em;
}

.badge-hf {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.12rem 0.45rem;
    border-radius: var(--radius-full);
    background: var(--amber-glow);
    color: var(--amber);
    letter-spacing: 0.03em;
}

.badge-source {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.12rem 0.45rem;
    border-radius: var(--radius-full);
    background: var(--accent-muted);
    color: var(--accent);
    letter-spacing: 0.03em;
}

/* ─── Two-Column Grid ─── */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.three-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.events-auto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* ─── Paper Cards ─── */
.paper-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 0.625rem;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
    animation: fadeSlideUp 0.4s ease-out both;
}

.paper-card:nth-child(1) { animation-delay: 0.05s; }
.paper-card:nth-child(2) { animation-delay: 0.1s; }
.paper-card:nth-child(3) { animation-delay: 0.15s; }
.paper-card:nth-child(4) { animation-delay: 0.2s; }
.paper-card:nth-child(5) { animation-delay: 0.25s; }

.paper-card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.paper-card .card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.paper-card .rank {
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
}

.paper-card .title {
    font-weight: 600;
    font-size: 0.9rem;
    margin: 0.2rem 0 0.35rem;
    line-height: 1.45;
}

.paper-card .title a {
    color: var(--text);
    transition: color 0.15s;
}

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

.paper-card .meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.paper-card .score-badge {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    min-width: 2.5rem;
    text-align: right;
    line-height: 1;
}

.paper-card .score-badge.high { color: var(--emerald); text-shadow: 0 0 12px var(--emerald-glow); }
.paper-card .score-badge.mid { color: var(--amber); text-shadow: 0 0 12px var(--amber-glow); }
.paper-card .score-badge.low { color: var(--red); text-shadow: 0 0 12px var(--red-glow); }

.paper-card .summary-text {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.paper-card .score-mini-track {
    height: 3px;
    background: var(--bg-deep);
    border-radius: 2px;
    margin-top: 0.75rem;
    overflow: hidden;
}

.paper-card .score-mini-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.paper-card .score-mini-fill.high { background: linear-gradient(90deg, #059669, #10b981); }
.paper-card .score-mini-fill.mid { background: linear-gradient(90deg, #d97706, #f59e0b); }
.paper-card .score-mini-fill.low { background: linear-gradient(90deg, #dc2626, #ef4444); }

/* ─── Paper Table ─── */
.paper-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.84rem;
}

.paper-table thead th {
    text-align: left;
    padding: 0.625rem 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--border-strong);
    white-space: nowrap;
    position: sticky;
    top: var(--nav-height);
    background: var(--bg-deep);
    z-index: 10;
}

.paper-table tbody tr {
    transition: background 0.1s;
}

.paper-table tbody tr:hover td {
    background: rgba(59, 130, 246, 0.04);
}

.paper-table td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.paper-table .col-rank {
    width: 2.5rem;
    text-align: center;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.paper-table .col-score {
    width: 4.5rem;
    text-align: center;
    font-family: var(--font-mono);
    font-weight: 600;
    cursor: help;
}

.paper-table .col-score.composite {
    font-weight: 700;
}

.paper-table .col-code {
    width: 2.5rem;
    text-align: center;
}

.paper-table .col-summary {
    color: var(--text-muted);
    font-size: 0.8rem;
    max-width: 300px;
}

.paper-table .paper-title-link {
    color: var(--text);
    font-weight: 500;
    transition: color 0.15s;
}

.paper-table .paper-title-link:hover {
    color: var(--accent-hover);
}

/* Score colors in table */
.score-high { color: var(--emerald); }
.score-mid { color: var(--amber); }
.score-low { color: var(--red); }

/* ─── Score Visualization ─── */
.score-track {
    height: 6px;
    background: var(--bg-deep);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.score-track--sm { height: 4px; }

.score-track--lg { height: 8px; }

.score-fill {
    height: 100%;
    border-radius: 3px;
    min-width: 2px;
    animation: fillBar 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.score-fill.high {
    background: linear-gradient(90deg, #059669, #34d399);
    box-shadow: 0 0 10px var(--emerald-glow);
}

.score-fill.mid {
    background: linear-gradient(90deg, #d97706, #fbbf24);
    box-shadow: 0 0 10px var(--amber-glow);
}

.score-fill.low {
    background: linear-gradient(90deg, #dc2626, #f87171);
    box-shadow: 0 0 10px var(--red-glow);
}

/* ─── Score Detail (Paper Detail Page) ─── */
.score-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.score-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
}

.score-item--composite {
    border-color: var(--border-accent);
    background: linear-gradient(145deg, rgba(59,130,246,0.06) 0%, var(--bg-card) 60%);
}

.score-item .label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.score-item .score-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.4rem 0;
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.score-item .score-value .max {
    font-size: 0.85rem;
    color: var(--text-dim);
    font-weight: 400;
}

.score-item .score-track {
    margin-top: 0.5rem;
}

/* ─── Paper Detail ─── */
.paper-detail {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    animation: fadeSlideUp 0.4s ease-out both;
}

.paper-detail .back-link {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: color 0.15s;
}

.paper-detail .back-link:hover {
    color: var(--accent);
}

.paper-detail h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-top: 0.75rem;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.paper-detail .authors {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
}

.paper-summary {
    margin: 1.25rem 0;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border-radius: var(--radius);
    border-left: 3px solid var(--accent);
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.paper-reasoning {
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.875rem;
    margin: 0.75rem 0;
    line-height: 1.6;
}

.paper-links {
    display: flex;
    gap: 0.5rem;
    margin: 1.25rem 0;
    flex-wrap: wrap;
}

.paper-links a {
    padding: 0.4rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.paper-links a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-muted);
    text-decoration: none;
}

.paper-abstract {
    line-height: 1.75;
    margin: 1.25rem 0;
    padding: 1.25rem;
    background: var(--bg);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.paper-abstract strong {
    color: var(--text);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.paper-meta {
    margin-top: 1rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.paper-meta strong {
    color: var(--text-secondary);
}

.context-block {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.context-block .context-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
}

.context-block pre {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    white-space: pre-wrap;
    line-height: 1.65;
}

/* ─── Filter Bar ─── */
.filter-bar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}

.filter-bar form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
    width: 100%;
}

.filter-bar input[type="search"],
.filter-bar input[type="number"],
.filter-bar select {
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text);
    padding: 0.45rem 0.75rem;
    font-size: 0.84rem;
    font-family: var(--font-body);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.filter-bar input:focus,
.filter-bar select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-muted);
}

.filter-bar input[type="search"] {
    flex: 1;
    min-width: 200px;
}

.filter-bar input[type="number"] {
    width: 5rem;
}

.filter-bar label {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    white-space: nowrap;
}

.filter-bar input[type="checkbox"] {
    appearance: none;
    width: 16px;
    height: 16px;
    border: 1.5px solid var(--border-strong);
    border-radius: 4px;
    background: var(--bg);
    cursor: pointer;
    position: relative;
    transition: background 0.15s, border-color 0.15s;
}

.filter-bar input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

.filter-bar input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 5px;
    height: 9px;
    border: solid var(--bg-deep);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.filter-bar input[type="search"]::placeholder {
    color: var(--text-dim);
}

/* ─── Events ─── */
.event-section {
    margin-bottom: 2rem;
}

.event-section .section-title {
    font-size: 1rem;
}

.event-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid transparent;
    transition: border-color 0.15s, transform 0.15s;
}

.event-card:hover {
    transform: translateX(2px);
}

.event-card--conference { border-left-color: var(--purple); }
.event-card--release { border-left-color: var(--emerald); }
.event-card--news { border-left-color: var(--accent); }

.event-card .event-title {
    font-weight: 600;
    font-size: 0.875rem;
}

.event-card .event-title a {
    color: var(--text);
    transition: color 0.15s;
}

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

.event-card .event-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.event-card .event-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
    line-height: 1.5;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.84rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    border: 1px solid var(--border-strong);
    background: var(--bg-card);
    color: var(--text-secondary);
    transition: all 0.15s;
    white-space: nowrap;
}

.btn:hover {
    background: var(--bg-surface);
    border-color: var(--text-dim);
    color: var(--text);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
    border-color: var(--accent);
    font-weight: 700;
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--bg-deep);
    box-shadow: 0 0 16px rgba(59, 130, 246, 0.25);
}

.btn-sm {
    padding: 0.35rem 0.7rem;
    font-size: 0.78rem;
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover {
    background: var(--accent-muted);
    color: var(--accent);
    border-color: transparent;
}

/* ─── Action Row ─── */
.action-row {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* ─── Pagination ─── */
.pagination {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    justify-content: center;
    align-items: center;
}

.pagination .page-info {
    color: var(--text-muted);
    font-size: 0.82rem;
    font-family: var(--font-mono);
    padding: 0 0.75rem;
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state h2 {
    font-family: var(--font-display);
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.empty-state p {
    max-width: 400px;
    margin: 0 auto;
    font-size: 0.9rem;
}

/* ─── Status Pills ─── */
.status-running {
    color: var(--amber);
    position: relative;
    padding-left: 14px;
}

.status-running::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--amber);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

.status-completed {
    color: var(--emerald);
    padding-left: 14px;
    position: relative;
}

.status-completed::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--emerald);
    border-radius: 50%;
}

.status-failed {
    color: var(--red);
    padding-left: 14px;
    position: relative;
}

.status-failed::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--red);
    border-radius: 50%;
}

/* ─── HTMX ─── */
.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    display: block;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ─── Code check in table ─── */
.code-check {
    color: var(--emerald);
    font-size: 0.9rem;
}

.code-dash {
    color: var(--text-dim);
}

/* ─── Animations ─── */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fillBar {
    from { width: 0 !important; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes loadSlide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(200%); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ─── Connected Papers ─── */
.connected-papers {
    margin-top: 1rem;
}

.connection-group {
    margin-bottom: 1.5rem;
}

.connection-group__label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.connection-list {
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

.connection-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    transition: background 0.1s;
}

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

.connection-item:hover {
    background: rgba(59, 130, 246, 0.04);
}

.connection-item--in-db {
    background: rgba(16, 185, 129, 0.03);
}

.connection-item--in-db:hover {
    background: rgba(16, 185, 129, 0.06);
}

.connection-title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

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

.connection-year {
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* ─── Filter select ─── */
.filter-bar select {
    min-width: 120px;
}

/* ─── Focus States ─── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .three-col {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 50px;
    }

    nav {
        padding: 0 1rem;
        gap: 1rem;
        height: var(--nav-height);
    }

    .logo {
        font-size: 1rem;
    }

    .nav-links a {
        font-size: 0.8rem;
        padding: 0.3rem 0.5rem;
    }

    .container {
        padding: 1.25rem 1rem;
    }

    .page-header h1 {
        font-size: 1.35rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .two-col {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .three-col {
        grid-template-columns: 1fr;
    }

    .paper-table .col-summary { display: none; }

    .filter-bar form {
        gap: 0.5rem;
    }

    .filter-bar input[type="search"] {
        min-width: 150px;
    }

    .paper-detail {
        padding: 1.25rem;
    }

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

@media (max-width: 480px) {
    :root {
        --nav-height: auto;
    }

    nav {
        flex-wrap: wrap;
        height: auto;
        padding: 0.75rem 1rem;
    }

    .nav-links {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.25rem;
    }

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

    .stat-card {
        padding: 0.85rem 1rem;
    }

    .stat-card .value {
        font-size: 1.35rem;
    }

    .paper-table th:nth-child(n+4):nth-child(-n+6),
    .paper-table td:nth-child(n+4):nth-child(-n+6) {
        display: none;
    }

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

    .paper-links {
        flex-direction: column;
    }

    .paper-links a {
        text-align: center;
    }

    .action-row {
        flex-direction: column;
    }

    .action-row .btn {
        width: 100%;
    }
}

/* ─── Toast notifications ─── */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-left: 3px solid var(--accent);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    color: var(--text);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    animation: toast-in 0.3s ease-out, toast-out 0.3s ease-in 3.7s forwards;
    max-width: 340px;
}

.toast--success { border-left-color: var(--emerald); }
.toast--warning { border-left-color: var(--amber); }
.toast--error { border-left-color: var(--red); }

@keyframes toast-in {
    from { opacity: 0; transform: translateY(1rem); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
    from { opacity: 1; }
    to { opacity: 0; transform: translateY(-0.5rem); }
}

/* ─── Signal Buttons ─── */
.signal-buttons {
    display: inline-flex;
    gap: 2px;
    align-items: center;
}

.signal-btn {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 0.7rem;
    padding: 2px 4px;
    line-height: 1;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.signal-btn:hover {
    background: var(--bg-surface);
    border-color: var(--border-strong);
}

.signal-btn--up:hover,
.signal-btn--up.active {
    color: var(--emerald);
    background: var(--emerald-glow);
    border-color: rgba(16, 185, 129, 0.3);
}

.signal-btn--down:hover,
.signal-btn--down.active {
    color: var(--red);
    background: var(--red-glow);
    border-color: rgba(239, 68, 68, 0.3);
}

.signal-btn--dismiss:hover,
.signal-btn--dismiss.active {
    color: var(--text-muted);
    background: var(--bg-surface);
    border-color: var(--border-strong);
}

/* Show signal buttons on row hover (desktop) */
.paper-table .col-signals {
    width: 5rem;
    text-align: center;
}

.paper-table .col-signals-header {
    width: 5rem;
    text-align: center;
}

.paper-table tbody tr .signal-buttons {
    opacity: 0.3;
    transition: opacity 0.15s;
}

.paper-table tbody tr:hover .signal-buttons {
    opacity: 1;
}

/* Always show if a signal is active */
.paper-table tbody tr .signal-buttons:has(.active) {
    opacity: 1;
}

/* ─── Boost Indicators ─── */
.boost-arrow {
    font-size: 0.6rem;
    margin-left: 2px;
    vertical-align: middle;
}

.boost-up {
    color: var(--emerald);
}

.boost-down {
    color: var(--red);
}

.score-raw {
    font-size: 0.6rem;
    color: var(--text-dim);
    font-weight: 400;
    margin-top: 1px;
}

.boost-pip {
    font-size: 0.55rem;
    line-height: 1;
}

.boost-pip--up {
    color: var(--emerald);
}

.boost-pip--down {
    color: var(--red);
}

/* Boost detail in score item */
.boost-detail {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.boost-label {
    color: var(--text-muted);
}

.boost-value {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.8rem;
}

/* ─── Discovery Badge ─── */
.badge--discover {
    background: var(--purple-glow);
    color: var(--purple);
    font-size: 0.55rem;
    padding: 0.1rem 0.4rem;
    margin-left: 0.35rem;
    vertical-align: middle;
}

/* ─── Preference Explanation (Paper Detail) ─── */
.pref-explanation {
    background: var(--bg);
    border: 1px solid var(--border);
    border-left: 3px solid var(--purple);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
}

.pref-explanation__label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--purple);
    margin-bottom: 0.4rem;
}

.pref-explanation__reasons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.pref-reason {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* ─── Cold Start Hint ─── */
.cold-start-hint {
    text-align: center;
    padding: 0.75rem;
    color: var(--text-dim);
    font-size: 0.82rem;
    border-top: 1px solid var(--border);
    margin-top: 0.5rem;
}

/* ─── Preferences Page ─── */
.pref-groups {
    display: grid;
    gap: 1.5rem;
}

.pref-group {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.pref-group .section-header {
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
}

.pref-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.pref-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
    transition: background 0.1s;
}

.pref-item:hover {
    background: rgba(59, 130, 246, 0.04);
}

.pref-item__name {
    font-size: 0.84rem;
    color: var(--text);
    min-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pref-item__count {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    min-width: 2.5rem;
    text-align: right;
}

.pref-bar-container {
    flex: 1;
    height: 6px;
    background: var(--bg-deep);
    border-radius: 3px;
    overflow: hidden;
    min-width: 60px;
}

.pref-bar {
    height: 100%;
    border-radius: 3px;
    min-width: 2px;
    transition: width 0.4s ease;
}

.pref-bar--positive {
    background: linear-gradient(90deg, #059669, #34d399);
}

.pref-bar--negative {
    background: linear-gradient(90deg, #dc2626, #f87171);
    float: right;
}

.pref-item__value {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    min-width: 3.5rem;
    text-align: right;
}

.pref-positive {
    color: var(--emerald);
}

.pref-negative {
    color: var(--red);
}

/* Responsive: preferences page */
@media (max-width: 768px) {
    .pref-item__name {
        min-width: 100px;
    }

    .pref-bar-container {
        min-width: 40px;
    }
}