:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #f0f4f9;
  --surface-3: #e8eef5;
  --border: #dde4ee;
  --border-strong: #c8d3e0;
  --text: #1a2332;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-2: #0891b2;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --human: #7c3aed;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  position: relative;
  padding: 72px 0 56px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(37, 99, 235, 0.07), transparent),
    radial-gradient(ellipse 50% 40% at 80% 50%, rgba(8, 145, 178, 0.05), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.15);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 8px;
  color: var(--text);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.authors {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.authors-block {
  margin-bottom: 20px;
}

.authors-line {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.85;
  margin-bottom: 12px;
}

.author-item {
  white-space: nowrap;
}

.author-item sup {
  font-size: 0.68em;
  color: var(--accent);
  font-weight: 600;
  margin-left: 1px;
}

.corr-mark {
  color: var(--warning);
  font-weight: 700;
}

.affiliations {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.aff-item sup {
  color: var(--accent);
  font-weight: 600;
  margin-right: 4px;
}

.aff-zh {
  margin-left: 6px;
  color: #94a3b8;
  font-size: 0.82rem;
}

.aff-zh::before {
  content: '·';
  margin-right: 6px;
}

.author-emails {
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.author-emails a {
  color: var(--accent);
  text-decoration: none;
}

.author-emails a:hover {
  text-decoration: underline;
}

.abstract {
  max-width: 820px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.hero-links {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.hero-links a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: var(--shadow);
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 40px 0 32px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
}

.stat-card .label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.stat-card .value {
  font-size: 2rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.02em;
}

.stat-card .value.human { color: var(--human); }
.stat-card .value.agent { color: var(--accent); }
.stat-card .value.neutral { color: var(--accent-2); }

.stat-card .sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-card .value.warning { color: var(--warning); }

.stat-card .placeholder {
  color: var(--warning);
  font-size: 1.2rem;
}

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
  overflow: hidden;
}

.panel-header {
  margin-bottom: 24px;
}

.panel-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.panel-header p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Leaderboard tabs */
.leaderboard-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  padding: 4px;
  background: var(--surface-2);
  border-radius: 10px;
  border: 1px solid var(--border);
  width: fit-content;
}

.lb-tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.lb-tab:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.6);
}

.lb-tab.active {
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.leaderboard-section {
  display: none;
}

.leaderboard-section.active {
  display: block;
}

.section-desc {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.section-tag {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 999px;
}

.section-tag.foundation {
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent);
}

.section-tag.agentic {
  background: rgba(217, 119, 6, 0.1);
  color: var(--warning);
}

.baseline-strip {
  margin-top: 20px;
  padding: 14px 18px;
  background: rgba(124, 58, 237, 0.06);
  border: 1px solid rgba(124, 58, 237, 0.15);
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.baseline-strip strong {
  color: var(--human);
  font-weight: 600;
}

.baseline-strip .baseline-score {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--human);
  font-size: 1rem;
}

/* Leaderboard table */
.table-wrap {
  overflow-x: auto;
}

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

.leaderboard th {
  text-align: left;
  padding: 12px 14px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
  background: var(--surface-2);
}

.leaderboard td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

.leaderboard tbody tr:hover {
  background: var(--accent-soft);
}

.leaderboard tbody tr.highlight {
  background: rgba(124, 58, 237, 0.04);
}

.leaderboard tbody tr.top-row {
  background: rgba(22, 163, 74, 0.04);
}

.leaderboard .rank {
  color: var(--text-muted);
  font-weight: 600;
}

.leaderboard .agent-name {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
}

.leaderboard .org-cell {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  color: var(--text-muted);
  max-width: 140px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.leaderboard .org-cell.placeholder-field {
  color: #94a3b8;
  font-style: italic;
  font-size: 0.78rem;
}

.leaderboard .type-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}

.type-tag.human { background: rgba(124, 58, 237, 0.1); color: var(--human); }
.type-tag.closed { background: rgba(37, 99, 235, 0.1); color: var(--accent); }
.type-tag.open { background: rgba(22, 163, 74, 0.1); color: var(--success); }
.type-tag.agent { background: rgba(217, 119, 6, 0.1); color: var(--warning); }
.type-tag.framework { background: rgba(217, 119, 6, 0.1); color: var(--warning); }

.leaderboard .na {
  color: var(--text-muted);
  opacity: 0.45;
}

.leaderboard .best {
  color: var(--success);
  font-weight: 600;
}

/* Charts */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.chart-panel canvas {
  max-height: 320px;
}

/* Category cards */
.category-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.category-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.category-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.category-card .en {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.category-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.category-card .metrics {
  display: flex;
  gap: 20px;
}

.category-card .metric .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent-2);
}

.category-card .metric .lbl {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.category-card .inst-best-name {
  font-size: 0.85rem !important;
  line-height: 1.3;
}

/* Error analysis */
.error-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.error-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.error-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--danger);
  opacity: 0.5;
}

.error-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.error-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Comparison */
.comparison-bars {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 600px;
}

.comparison-bar label {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.comparison-bar label span:last-child {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent-2);
}

.bar-track {
  height: 32px;
  background: var(--surface-2);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.bar-fill {
  height: 100%;
  border-radius: 7px;
  display: flex;
  align-items: center;
  padding-left: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  transition: width 1s ease;
  min-width: 0;
}

.bar-fill.osworld { background: linear-gradient(90deg, #3b82f6, #6366f1); }
.bar-fill.labosbench { background: linear-gradient(90deg, #0891b2, #06b6d4); }
.bar-fill.e2e { background: linear-gradient(90deg, #ef4444, #f97316); }

.comparison-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Instrument grid */
.instrument-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.instrument-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
}

.inst-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.inst-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-2);
}

.inst-subtasks {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

.inst-full {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.inst-goal {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.inst-rates {
  display: flex;
  gap: 24px;
  margin-bottom: 8px;
}

.inst-rates .lbl {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.inst-rates .val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 600;
}

.inst-rates .val.human { color: var(--human); }
.inst-rates .val.agent { color: var(--accent); }

.inst-best {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* E2E section */
.e2e-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.e2e-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
}

.e2e-stat {
  flex: 1 1 140px;
  min-width: 0;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 16px;
  text-align: center;
}

.e2e-stat.secondary .e2e-val {
  color: var(--accent-2);
  font-size: 2rem;
}

.e2e-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: var(--warning);
}

.e2e-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.4;
  word-break: break-word;
}

.e2e-note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.e2e-table-wrap {
  width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.e2e-table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  table-layout: fixed;
}

.e2e-table th {
  text-align: left;
  padding: 10px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
  background: var(--surface-2);
}

.e2e-table th:nth-child(1) { width: 28%; }
.e2e-table th:nth-child(2) { width: 32%; }
.e2e-table th:nth-child(3) { width: 40%; }

.e2e-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.e2e-table tbody tr:hover {
  background: var(--accent-soft);
}

.e2e-inst {
  font-weight: 600;
  color: var(--accent-2);
}

.e2e-rate {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
}

.e2e-rate.rate-ok { color: var(--success); }
.e2e-rate.rate-fail { color: var(--danger); }

.e2e-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.e2e-status.status-ok {
  background: rgba(22, 163, 74, 0.1);
  color: var(--success);
}

.e2e-status.status-fail {
  background: rgba(220, 38, 38, 0.08);
  color: var(--danger);
}

/* Findings */
.findings-list {
  list-style: none;
  margin-bottom: 24px;
}

.findings-list li {
  padding: 12px 16px 12px 20px;
  border-left: 3px solid var(--accent);
  background: var(--surface-2);
  border-radius: 0 8px 8px 0;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 48px;
  text-align: center;
  background: var(--surface);
}

.footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-note {
  margin-top: 4px;
  font-size: 0.8rem !important;
}

.footer code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 768px) {
  .charts-row {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .leaderboard-tabs {
    width: 100%;
  }

  .lb-tab {
    flex: 1;
    text-align: center;
    padding: 8px 10px;
    font-size: 0.8rem;
  }
}