@import url("https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap");

@font-face {
  font-family: "Geist Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("https://cdn.jsdelivr.net/fontsource/fonts/geist:vf@latest/latin-wght-normal.woff2") format("woff2-variations");
}

@font-face {
  font-family: "Geist Mono Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("https://cdn.jsdelivr.net/fontsource/fonts/geist-mono:vf@latest/latin-wght-normal.woff2") format("woff2-variations");
}

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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1e293b;
  --color-heading: #0f172a;
  --color-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e2e8f0;
  --color-open: #059669;
  --color-closed: #7c3aed;
  --color-logic: #4f46e5;
  --color-cs: #2563eb;
  --color-chemistry: #0d9488;
  --color-chess: #d97706;
  --color-math: #7c3aed;
  --font-sans: "Space Mono", "Geist Variable", "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Space Mono", "Geist Mono Variable", "Geist Mono", "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --max-width: 1200px;
  --section-pad: 80px;
  --nav-height: 60px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Navigation === */
#navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
  height: var(--nav-height);
}

#navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-heading);
  text-decoration: none;
  letter-spacing: -0.02em;
  font-family: var(--font-mono);
}

.brand-accent {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

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

/* === Hero === */
#hero {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(180deg, #f0f4ff 0%, var(--color-bg) 100%);
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-muted);
  margin-bottom: 22px;
  font-weight: 400;
}

.stats-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  margin-bottom: 40px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-heading);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero-link-btn {
  width: 152px;
  min-width: 152px;
  justify-content: center;
}

.hero-link-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}

.hero-link-icon-img {
  object-fit: contain;
  width: 20px;
  height: 20px;
  flex-basis: 20px;
}

.btn-code {
  background: var(--color-heading);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
}

.btn-code:hover {
  background: #334155;
}

.copy-icon {
  opacity: 0.6;
  font-size: 0.8rem;
}

/* === Sections === */
section {
  padding: var(--section-pad) 0;
}

.alt-bg {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  font-family: var(--font-mono);
}

.section-desc {
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 960px;
}

.subsection-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 48px 0 16px;
  font-family: var(--font-mono);
}

/* === Tab Bar === */
.leaderboard-controls {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  margin-bottom: 24px;
  width: fit-content;
  max-width: 100%;
}

.tab-bar {
  display: flex;
  gap: 4px;
  background: var(--color-bg-alt);
  border-radius: 10px;
  padding: 4px;
  width: fit-content;
}

.tab-btn {
  padding: 8px 20px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.15s;
}

.tab-btn.active {
  background: var(--color-bg);
  color: var(--color-heading);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.leaderboard-scope {
  color: #94a3b8;
  margin: 0;
  font-size: 0.82rem;
  white-space: nowrap;
}

/* === Charts === */
.chart-container {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto 32px;
}

#overallChart {
  width: 100%;
}

#domainChart {
  max-height: none;
}

/* === Table === */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 16px;
}

#leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

#leaderboard-table thead {
  background: var(--color-bg-alt);
}

#leaderboard-table th {
  padding: 12px 16px;
  padding-right: 28px;
  text-align: left;
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
  text-overflow: ellipsis;
}

#leaderboard-table th:hover {
  color: var(--color-accent);
}

#leaderboard-table th.sort-active {
  color: var(--color-accent);
}

#leaderboard-table th::after {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  text-align: center;
  font-size: 0.7em;
  color: var(--color-accent);
}

#leaderboard-table th.sort-desc::after {
  content: "\25BC";
}

#leaderboard-table th.sort-asc::after {
  content: "\25B2";
}

#leaderboard-table td {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  white-space: nowrap;
}

#leaderboard-table th[data-sort="rank"],
#leaderboard-table td.rank-cell {
  width: 56px;
}

#leaderboard-table th[data-sort="provider"] {
  width: 140px;
}

#leaderboard-table th[data-sort="overall"],
#leaderboard-table th[data-sort="logic"],
#leaderboard-table th[data-sort="cs"],
#leaderboard-table th[data-sort="chemistry"],
#leaderboard-table th[data-sort="chess"],
#leaderboard-table th[data-sort="math"] {
  width: 88px;
}

#leaderboard-table tbody tr:hover {
  background: #f1f5f9;
}

.model-name {
  font-weight: 600;
  color: var(--color-heading);
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-left: 8px;
  vertical-align: middle;
}

.badge-open {
  background: #ecfdf5;
  color: var(--color-open);
}

.badge-closed {
  background: #f5f3ff;
  color: var(--color-closed);
}

.rank-cell {
  font-weight: 700;
  color: var(--color-accent);
}

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text ul {
  margin: 16px 0;
  padding-left: 20px;
}

.about-text li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.about-figure img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.figure-caption {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 8px;
  font-style: italic;
}

/* === Domains === */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.domain-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  border-top: 3px solid transparent;
  transition: box-shadow 0.15s;
}

.domain-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.domain-logic  { border-top-color: var(--color-logic); }
.domain-cs     { border-top-color: var(--color-cs); }
.domain-chemistry { border-top-color: var(--color-chemistry); }
.domain-chess  { border-top-color: var(--color-chess); }
.domain-math   { border-top-color: var(--color-math); }

.domain-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.domain-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.domain-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.domain-card p {
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 12px;
}

.domain-templates {
  font-size: 0.78rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  line-height: 1.5;
}

/* === Analysis === */
.analysis-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.analysis-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

.analysis-card img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  background: #fff;
  padding: 12px;
  border-bottom: 1px solid var(--color-border);
}

.analysis-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  padding: 16px 20px 4px;
}

.analysis-card p {
  font-size: 0.88rem;
  color: var(--color-muted);
  padding: 0 20px 20px;
  line-height: 1.55;
}

/* === Examples === */
.example-panel {
  display: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

.example-panel.active {
  display: block;
}

.example-header {
  padding: 16px 24px;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.example-domain {
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
}

.domain-math-badge { background: var(--color-math); }
.domain-chemistry-badge { background: var(--color-chemistry); }
.domain-chess-badge { background: var(--color-chess); }
.domain-logic-badge { background: var(--color-logic); }
.domain-cs-badge { background: var(--color-cs); }

.example-info {
  font-size: 0.82rem;
  color: var(--color-muted);
}

.example-content {
  padding: 24px;
}

.example-content p {
  margin-bottom: 16px;
}

.code-block {
  background: #1e293b;
  color: #e2e8f0;
  padding: 16px 20px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.example-answer {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--color-bg-alt);
  border-radius: 8px;
  font-size: 0.9rem;
}

.example-answer code {
  font-family: var(--font-mono);
  background: #e2e8f0;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.code-block-wrapper {
  position: relative;
}

.code-block-wrapper .code-block {
  padding-right: 70px;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 12px;
  background: #334155;
  color: #94a3b8;
  border: none;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.copy-btn:hover {
  background: #475569;
  color: #e2e8f0;
}

.copy-btn.copied {
  background: var(--color-open);
  color: #fff;
}

.narrow-section {
  max-width: 720px;
}

.wide-section {
  max-width: 980px;
}

.team-block {
  color: var(--color-text);
  line-height: 1.75;
}

.team-authors {
  font-size: 1rem;
  line-height: 1.95;
  color: var(--color-heading);
}

.team-authors sup,
.team-note sup,
.team-affiliations sup {
  font-size: 0.72em;
  vertical-align: super;
}

.team-note {
  margin-top: 14px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.team-affiliations {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.team-contact {
  margin-top: 16px;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.team-contact a {
  color: var(--color-accent);
  text-decoration: none;
}

.team-contact a:hover {
  text-decoration: underline;
}

.bibtex {
  font-size: 0.78rem;
}

/* === Submit === */
.submit-content {
  max-width: 700px;
}

.submit-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.submit-content li {
  margin-bottom: 10px;
  line-height: 1.6;
}

.submit-content > p code,
.submit-content > ol code {
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88rem;
}

.code-block code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.submit-content .code-block-wrapper {
  margin: 16px 0;
}

/* === Footer === */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.15s;
}

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

.footer-copy {
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* === Responsive: Tablet === */
@media (max-width: 768px) {
  :root {
    --section-pad: 56px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  }

  .nav-links.open {
    display: flex;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .stats-row {
    gap: 24px;
  }

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

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

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

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

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

/* === Responsive: Mobile === */
@media (max-width: 480px) {
  :root {
    --section-pad: 40px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .stats-row {
    flex-direction: column;
    gap: 16px;
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-link-btn {
    width: 220px;
    min-width: 220px;
  }

  .leaderboard-controls {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    overflow: visible;
  }

  .tab-bar {
    width: fit-content;
    flex: 0 0 auto;
  }

  .leaderboard-scope {
    flex: 0 0 auto;
    white-space: normal;
  }

  .example-tab-bar {
    width: 100%;
    flex-wrap: wrap;
    overflow: visible;
  }

  .example-tab-bar .tab-btn {
    flex: 1 1 calc(50% - 4px);
    text-align: center;
    min-width: 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  #leaderboard-table {
    font-size: 0.8rem;
  }

  #leaderboard-table th,
  #leaderboard-table td {
    padding: 8px 10px;
  }

  .example-header {
    flex-direction: column;
    align-items: flex-start;
  }
}