/* ============================
   KUAISEARCH WEBSITE STYLES
   ============================ */

:root {
  --blue: #4a90e2;
  --blue-dark: #2563eb;
  --blue-light: #93c5fd;
  --green: #10b981;
  --green-light: #6ee7b7;
  --orange: #f59e0b;
  --red: #ef4444;
  --purple: #8b5cf6;
  --pink: #ec4899;

  --bg-dark: #0f1117;
  --bg-dark2: #161b27;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --text-dark: #1a202c;
  --text-muted: #64748b;
  --text-light: #f1f5f9;
  --border: #e2e8f0;
  --border-dark: #2d3748;

  --gradient-hero: linear-gradient(135deg, #0f1117 0%, #1a2744 50%, #0f1117 100%);
  --gradient-accent: linear-gradient(135deg, #4a90e2, #7c3aed);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-white);
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ NAVBAR ============ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background var(--transition);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}

.nav-logo .logo-icon {
  font-size: 22px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  padding: 6px 12px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  transition: all var(--transition);
}

.nav-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
}

.btn-github {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.1);
  color: #fff !important;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn-github:hover {
  background: rgba(255,255,255,0.2);
}

/* ============ HERO ============ */
#hero {
  position: relative;
  min-height: 100vh;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(74, 144, 226, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 70%, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(74, 144, 226, 0.3);
  animation: float linear infinite;
}

@keyframes float {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
  text-align: center;
}

.conference-badge {
  display: inline-block;
  padding: 6px 20px;
  background: linear-gradient(135deg, rgba(74,144,226,0.2), rgba(124,58,237,0.2));
  border: 1px solid rgba(74,144,226,0.4);
  border-radius: 100px;
  color: #93c5fd;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-sub {
  display: block;
  font-size: clamp(16px, 2.2vw, 24px);
  font-weight: 400;
  background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(147, 197, 253, 0.8));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 12px;
}

.authors {
  margin: 32px 0;
}

.author-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.author {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.author-name {
  color: #e2e8f0;
  font-size: 15px;
  font-weight: 600;
}

.author-name sup {
  font-size: 10px;
  color: var(--blue-light);
}

.author-affil {
  color: rgba(255,255,255,0.5);
  font-size: 12px;
}

.author-note {
  color: rgba(255,255,255,0.45);
  font-size: 12px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 32px 0;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #4a90e2, #7c3aed);
  color: #fff;
  box-shadow: 0 4px 20px rgba(74, 144, 226, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(74, 144, 226, 0.5);
}

.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* ============ HERO STATS ============ */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 48px;
}

.stat-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 20px 28px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: transform var(--transition), border-color var(--transition);
  min-width: 140px;
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(74, 144, 226, 0.4);
}

.stat-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============ SECTIONS ============ */
.section {
  padding: 96px 0;
}

.section-light {
  background: var(--bg-light);
}

.section-dark {
  background: var(--bg-dark);
}

.section-white {
  background: var(--bg-white);
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
  text-align: center;
}

.section-title.light {
  color: #fff;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 56px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle.light {
  color: rgba(255,255,255,0.6);
}

/* ============ ABSTRACT ============ */
.abstract-box {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--blue);
}

.abstract-box p {
  color: var(--text-dark);
  font-size: 16.5px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.abstract-box p:last-child {
  margin-bottom: 0;
}

/* ============ SEARCH ENTRIES ============ */
.entries-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.entry-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}

.entry-card:hover {
  transform: translateY(-6px);
  border-color: rgba(74, 144, 226, 0.3);
}

.entry-img-wrap {
  width: 100%;
  background: #1a2030;
  overflow: hidden;
}

.entry-img-wrap img {
  width: 100%;
  height: 300px;
  display: block;
  transition: transform 0.4s ease;
  object-fit: cover;
  object-position: top center;
}

.entry-card:hover .entry-img-wrap img {
  transform: scale(1.03);
}

.entry-info {
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
}

.entry-info h3 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 5px;
}

.entry-info p {
  font-size: 12.5px;
  color: rgba(255,255,255,0.6);
  line-height: 1.55;
  margin-bottom: 10px;
}

.entry-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(74,144,226,0.15);
  border: 1px solid rgba(74,144,226,0.3);
  border-radius: 100px;
  font-size: 12px;
  color: #93c5fd;
  font-weight: 600;
}

.entry-badge.badge-green {
  background: rgba(16,185,129,0.15);
  border-color: rgba(16,185,129,0.3);
  color: #6ee7b7;
}

.entry-badge.badge-purple {
  background: rgba(139,92,246,0.15);
  border-color: rgba(139,92,246,0.3);
  color: #c4b5fd;
}

/* ============ PIPELINE ============ */
.pipeline-wrap {
  overflow-x: auto;
  margin-bottom: 60px;
}

.pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-width: 600px;
  padding: 16px 0;
}

.pipeline-stage {
  flex: 1;
  max-width: 260px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 2px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.pipeline-stage:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stage-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.recall-color { background: rgba(74, 144, 226, 0.12); color: var(--blue); }
.ranking-color { background: rgba(16, 185, 129, 0.12); color: var(--green); }
.relevance-color { background: rgba(139, 92, 246, 0.12); color: var(--purple); }

.stage-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.stage-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.stage-size {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-light);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-dark);
  font-family: 'JetBrains Mono', monospace;
}

.pipeline-arrow {
  font-size: 28px;
  color: var(--text-muted);
  font-weight: 300;
  flex-shrink: 0;
}

/* ============ TABLES ============ */
.tables-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.table-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.table-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  background: var(--bg-light);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 2px solid var(--border);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dark);
  vertical-align: top;
}

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

.data-table tr:hover td {
  background: rgba(74, 144, 226, 0.04);
}

.highlight-row td {
  background: rgba(74, 144, 226, 0.06) !important;
  font-weight: 600;
}

.table-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.5;
}

/* Tags */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.tag-blue { background: rgba(74,144,226,0.1); color: #2563eb; }
.tag-green { background: rgba(16,185,129,0.1); color: #059669; }
.tag-orange { background: rgba(245,158,11,0.1); color: #d97706; }
.tag-red { background: rgba(239,68,68,0.1); color: #dc2626; }
.tag-purple { background: rgba(139,92,246,0.1); color: #7c3aed; }

.badge-text {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(16,185,129,0.1);
  color: #059669;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.badge-anon {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(245,158,11,0.1);
  color: #d97706;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

/* ============ ANALYSIS ============ */
.figures-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 48px;
}

.figure-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.figure-card:hover {
  border-color: rgba(74, 144, 226, 0.3);
}

.figure-card img {
  width: 100%;
  height: auto;
  display: block;
  background: #1a2030;
  flex-shrink: 0;
}

.figure-caption {
  padding: 16px 20px;
  font-size: 13.5px;
  color: rgba(255,255,255,0.65);
  line-height: 1.65;
  background: rgba(255,255,255,0.04);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.pdf-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 180px;
  background: rgba(255,255,255,0.03);
  color: rgba(255,255,255,0.5);
  font-size: 15px;
}

.subsection-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 28px;
  text-align: center;
}

.subsection-title.light {
  color: #fff;
}

/* Bar Chart */
.query-stats-wrap {
  padding: 24px;
}

.query-stats-wrap h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.bar-chart {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bar-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-label {
  width: 36px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255,255,255,0.6);
  text-align: right;
  flex-shrink: 0;
}

.bar-fill {
  height: 26px;
  width: calc(var(--val) * 3.5px);
  max-width: 280px;
  min-width: 20px;
  background: linear-gradient(90deg, #4a90e2, #7c3aed);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  transition: width 0.8s ease;
}

.bar-fill span {
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.chart-note {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 16px;
  line-height: 1.6;
}

/* Categories */
.categories-section {
  margin-bottom: 48px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 800px;
  margin: 0 auto 20px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.06);
}

.cat-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.cat-name {
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  font-weight: 500;
  flex: 1;
}

.cat-bar {
  height: 6px;
  width: var(--w);
  background: linear-gradient(90deg, #4a90e2, #7c3aed);
  border-radius: 3px;
  flex-shrink: 0;
  max-width: 80px;
}

.light-note {
  color: rgba(255,255,255,0.5);
  text-align: center;
  margin-top: 8px;
}

/* Relevance */
.relevance-section {
  margin-top: 48px;
}

.relevance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.rel-card {
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  transition: transform var(--transition);
}

.rel-card:hover {
  transform: translateY(-4px);
}

.score-0 { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.2); }
.score-1 { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.2); }
.score-2 { background: rgba(74,144,226,0.1); border: 1px solid rgba(74,144,226,0.2); }
.score-3 { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.2); }

.rel-score {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.score-0 .rel-score { color: #f87171; }
.score-1 .rel-score { color: #fbbf24; }
.score-2 .rel-score { color: #60a5fa; }
.score-3 .rel-score { color: #34d399; }

.rel-pct {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.rel-label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}

.rel-example {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  text-align: left;
}

.ex-label {
  font-weight: 600;
  color: rgba(255,255,255,0.65);
}

/* ============ DEMOGRAPHICS ============ */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.demo-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.demo-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.donut-chart-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.donut-chart {
  position: relative;
}

.donut-legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dark);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Age Bars */
.age-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.age-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.age-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  width: 40px;
  flex-shrink: 0;
}

.age-bar-wrap {
  flex: 1;
  height: 24px;
  background: var(--bg-light);
  border-radius: 4px;
  overflow: hidden;
}

.age-bar {
  height: 100%;
  background: linear-gradient(90deg, #4a90e2, #93c5fd);
  border-radius: 4px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  min-width: 44px;
  transition: width 0.8s ease;
}

.age-bar.age-primary {
  background: linear-gradient(90deg, #2563eb, #4a90e2);
}

.age-bar span {
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}

/* Entrance Bars */
.entrance-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entrance-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.entrance-info {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}

.entrance-name {
  color: var(--text-dark);
  font-weight: 500;
}

.entrance-pct {
  color: var(--text-muted);
  font-weight: 600;
}

.entrance-bar-wrap {
  height: 8px;
  background: var(--bg-light);
  border-radius: 4px;
  overflow: hidden;
}

.entrance-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.8s ease;
}

/* ============ BENCHMARK ============ */
.benchmark-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}

.tab-btn {
  padding: 10px 24px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
}

.tab-btn.active {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: #fff;
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.bench-description {
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 20px;
}

.bench-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.bench-table thead tr {
  background: #1a2744;
}

.bench-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.7);
  white-space: nowrap;
}

.bench-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dark);
  background: var(--bg-white);
}

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

.best-row td {
  background: rgba(74, 144, 226, 0.05) !important;
}

.second-row td {
  background: rgba(16, 185, 129, 0.04) !important;
}

.method-tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.lexical { background: rgba(245,158,11,0.1); color: #d97706; }
.embedding { background: rgba(74,144,226,0.1); color: #2563eb; }
.generative { background: rgba(139,92,246,0.1); color: #7c3aed; }
.mlp { background: rgba(16,185,129,0.1); color: #059669; }
.crossing { background: rgba(239,68,68,0.1); color: #dc2626; }
.attention { background: rgba(245,158,11,0.1); color: #d97706; }
.biencoder { background: rgba(245,158,11,0.1); color: #d97706; }
.crossencoder { background: rgba(74,144,226,0.1); color: #2563eb; }
.llm { background: rgba(139,92,246,0.1); color: #7c3aed; }

.bench-finding {
  display: flex;
  gap: 14px;
  background: rgba(74, 144, 226, 0.06);
  border: 1px solid rgba(74, 144, 226, 0.15);
  border-radius: var(--radius);
  padding: 16px 20px;
  align-items: flex-start;
}

.finding-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.bench-finding p {
  font-size: 14px;
  color: var(--text-dark);
  line-height: 1.65;
}

/* ============ DATA PREVIEW ============ */
.preview-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  justify-content: center;
}

.preview-tab-btn {
  padding: 8px 20px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.preview-tab-btn:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
}

.preview-tab-btn.active {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: #fff;
}

.preview-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.preview-content.active {
  display: block;
}

.code-block {
  background: #0f1117;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  overflow-x: auto;
  margin-bottom: 32px;
}

.code-block code {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.75;
  color: #e2e8f0;
  white-space: pre;
}

.download-section {
  text-align: center;
  padding: 40px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.download-section h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.download-section p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.download-btns {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.download-btns .btn-secondary {
  background: var(--bg-light);
  color: var(--text-dark);
  border-color: var(--border);
}

.download-btns .btn-secondary:hover {
  background: var(--border);
}

/* ============ BIBTEX ============ */
.bibtex-wrap {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.copy-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.copy-btn:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.copy-btn.copied {
  background: rgba(16,185,129,0.2);
  border-color: rgba(16,185,129,0.4);
  color: #6ee7b7;
}

#bibtex-code {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  overflow-x: auto;
}

#bibtex-code code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(255,255,255,0.85);
  white-space: pre;
}

/* ============ FOOTER ============ */
footer {
  background: #080b11;
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: rgba(255,255,255,0.85);
}

.footer-note {
  color: rgba(255,255,255,0.35);
  font-size: 13px;
}

.footer-note a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.footer-note a:hover {
  color: rgba(255,255,255,0.8);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .entries-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

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

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

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

  .query-analysis-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .pipeline-arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .pipeline-stage {
    max-width: 100%;
  }

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

  .hero-stats {
    gap: 12px;
  }

  .stat-card {
    min-width: 120px;
    padding: 16px 20px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-title {
    font-size: 32px;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .abstract-box {
    padding: 28px 24px;
  }

  .benchmark-tabs {
    flex-wrap: wrap;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    align-items: center;
  }

  .stat-card {
    width: 100%;
    max-width: 280px;
  }

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

/* ============ WORD CLOUD ============ */
.wordcloud-section {
  margin-bottom: 64px;
}

.wordcloud-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.wordcloud-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.wordcloud-card:hover {
  border-color: rgba(74, 144, 226, 0.35);
  transform: translateY(-3px);
}

.wordcloud-img-wrap {
  width: 100%;
  background: #000;
  flex-shrink: 0;
}

.wordcloud-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

.wordcloud-label {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.03);
}

.wordcloud-label p {
  font-size: 12.5px;
  color: rgba(255,255,255,0.6);
  line-height: 1.55;
}

.wc-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  width: fit-content;
}

.wc-badge-blue {
  background: rgba(74,144,226,0.15);
  border: 1px solid rgba(74,144,226,0.35);
  color: #93c5fd;
}

.wc-badge-purple {
  background: rgba(139,92,246,0.15);
  border: 1px solid rgba(139,92,246,0.35);
  color: #c4b5fd;
}

/* ============ QUERY ANALYSIS ============ */
.query-analysis-section {
  margin-bottom: 64px;
}

.query-analysis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}

.query-dist-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
  max-width: 960px;
  margin: 0 auto 28px;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.query-dist-card:hover {
  border-color: rgba(74, 144, 226, 0.35);
}

.query-dist-card img {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
  flex-shrink: 0;
}

.query-dist-card .figure-caption {
  background: rgba(255,255,255,0.04);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 14px 20px 16px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ---- Query Length Visualisation Card ---- */
.ql-vis-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px 32px 24px;
}

.ql-vis-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.ql-vis-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
}

.ql-legend {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  font-weight: 500;
}

.ql-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 4px;
}

/* Rows */
.ql-rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ql-row {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  transition: background var(--transition);
}

.ql-row:hover {
  background: rgba(255,255,255,0.04);
}

.ql-row-peak {
  background: rgba(74, 144, 226, 0.07);
  border: 1px solid rgba(74, 144, 226, 0.15);
}

.ql-row-peak:hover {
  background: rgba(74, 144, 226, 0.12) !important;
}

.ql-row-label {
  font-size: 14px;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.2;
}

.ql-peak-badge {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #60a5fa;
  background: rgba(96, 165, 250, 0.15);
  border: 1px solid rgba(96, 165, 250, 0.3);
  padding: 2px 5px;
  border-radius: 4px;
  width: fit-content;
}

.ql-row-bars {
  min-width: 0;
}

.ql-bar-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.ql-bar-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ql-bar-track {
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  overflow: hidden;
}

.ql-bar-fill {
  height: 100%;
  border-radius: 4px;
  opacity: 0.85;
  transition: opacity var(--transition);
}

.ql-bar-fill.best-glow {
  opacity: 1;
  box-shadow: 0 0 6px currentColor;
}

.ql-bar-val {
  font-size: 11px;
  color: rgba(255,255,255,0.55);
  font-family: 'JetBrains Mono', monospace;
  white-space: nowrap;
  line-height: 1;
}

.ql-bar-val.best-val {
  color: #fde68a;
  font-weight: 700;
}

/* Insight box */
.ql-insight {
  margin-top: 20px;
  padding: 14px 18px 14px 44px;
  background: rgba(74, 144, 226, 0.07);
  border: 1px solid rgba(74, 144, 226, 0.18);
  border-radius: 10px;
  font-size: 13.5px;
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
  position: relative;
}

.ql-insight-icon {
  position: absolute;
  left: 16px;
  top: 14px;
  font-size: 18px;
}

/* Old query-stats-card — keep for backward compat */
.query-stats-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.query-stats-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.query-stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 8px;
}

.query-stats-table th {
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.5);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  text-align: left;
  white-space: nowrap;
}

.query-stats-table td {
  padding: 7px 10px;
  color: rgba(255,255,255,0.75);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  white-space: nowrap;
}

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

.ql-label {
  font-weight: 700;
  color: rgba(255,255,255,0.9) !important;
  width: 80px;
}

.ql-highlight td {
  background: rgba(74,144,226,0.08);
}

.ql-best {
  color: #6ee7b7 !important;
  font-weight: 700;
}

.ql-avgclick {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}

.query-note {
  font-size: 12.5px;
  color: rgba(255,255,255,0.45);
  line-height: 1.6;
  margin-top: 14px;
}

/* ============ SCROLL ANIMATIONS ============ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}