@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
  --bg:         #0d0d0d;
  --bg-card:    #161616;
  --bg-hover:   #1e1e1e;
  --border:     #2a2a2a;
  --accent:     #00d4ff;
  --purple:     #7c3aed;
  --green:      #10b981;
  --red:        #ef4444;
  --text:       #e5e5e5;
  --text-muted: #888;
  --text-dim:   #555;
  --radius:     8px;
  --radius-lg:  12px;
}

html { font-size: 16px; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* ── Layout ── */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ── Hero ── */
.hero {
  border-bottom: 1px solid var(--border);
  padding: 40px 0 32px;
}
.hero-inner { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.hero h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
.hero h1 span { color: var(--accent); }
.hero p { color: var(--text-muted); font-size: 14px; margin-top: 4px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.chip strong { color: var(--accent); }

/* ── Tabs ── */
.tabs-bar {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  padding: 20px 0 0;
  overflow-x: auto;
}
.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn.pending { color: var(--text-dim); }
.tab-btn.pending::after { content: ' •'; color: var(--text-dim); }

.tab-panel { display: none; padding: 32px 0; }
.tab-panel.active { display: block; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.card-desc {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.4;
}

/* ── Stat cards ── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.stat-label { font-size: 11px; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 28px; font-weight: 700; margin-top: 4px; letter-spacing: -1px; }
.stat-sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.accent { color: var(--accent); }
.purple { color: var(--purple); }
.green { color: var(--green); }
.muted { color: var(--text-muted); }

/* ── Grid layouts ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ── Chart wrappers ── */
.chart-wrap { position: relative; }
.chart-wrap canvas { max-height: 300px; }

/* ── Comparison table ── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
tbody tr { border-bottom: 1px solid var(--border); transition: background 0.1s; }
tbody tr:hover { background: var(--bg-hover); }
tbody tr:last-child { border-bottom: none; }
tbody td { padding: 12px 16px; }
.model-name { font-weight: 600; }
.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.badge-openai { background: rgba(0, 212, 255, 0.15); color: var(--accent); }
.badge-claude { background: rgba(124, 58, 237, 0.15); color: var(--purple); }
.badge-pending { background: rgba(85,85,85,0.2); color: var(--text-dim); }
.pending-row td { color: var(--text-dim); }

/* ── Model header ── */
.model-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.model-header h2 { font-size: 20px; font-weight: 700; }
.model-badge-lg {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* ── Section spacing ── */
.section { margin-bottom: 24px; }

/* ── Methodology ── */
.methodology {
  border-color: var(--border);
}
.methodology summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
  user-select: none;
  padding-bottom: 0;
}
.methodology[open] summary {
  padding-bottom: 0;
}
.methodology summary::-webkit-details-marker { display: none; }
.method-toggle {
  color: var(--text-dim);
  font-size: 11px;
  transition: transform 0.2s;
  margin-left: 8px;
}
.methodology[open] .method-toggle { transform: rotate(90deg); }

.method-body {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.method-section h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}
.method-section p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.method-section p strong { color: var(--text); font-weight: 600; }
.method-section a { color: var(--accent); text-decoration: none; }
.method-section a:hover { text-decoration: underline; }
.method-section code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  color: var(--accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.method-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.method-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
}
.method-val {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.formula {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  color: var(--text);
  margin-top: 10px;
  line-height: 1.6;
  overflow-x: auto;
}

/* ── Footer ── */
footer {
  margin-top: 80px;
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
}
.footer-right a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-right a:hover { color: var(--accent); }

/* ── Pending overlay ── */
.pending-card {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  color: var(--text-dim);
}
.pending-card p { font-size: 14px; margin-top: 8px; }