:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1f2937;
  --bg-card-hover: #283548;
  --border-color: #374151;
  --border-highlight: #4b5563;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-gold: #fbbf24;
  --accent-emerald: #10b981;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-rose: #f43f5e;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-top: 0.5rem;
  max-width: 850px;
}

.meta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.meta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.meta-link:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-indigo);
  color: #ffffff;
}

/* Nav Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: #ffffff;
  border-bottom-color: var(--accent-indigo);
}

.tab-content {
  display: none;
}

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

/* Controls */
.controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  align-items: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  min-width: 180px;
}

.control-group label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 700;
}

.control-group select,
.control-group input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  outline: none;
}

.control-group select:focus,
.control-group input:focus {
  border-color: var(--accent-indigo);
}

/* Table */
.table-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow-x: auto;
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

th:hover {
  color: var(--text-primary);
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  white-space: nowrap;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

tbody tr.highlight-row {
  background: rgba(16, 185, 129, 0.05);
}

tbody tr.highlight-row:hover {
  background: rgba(16, 185, 129, 0.08);
}

/* Tiers */
.tier-tag {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.tier-1 {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.tier-2 {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.4);
}

.tier-3 {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.tier-4 {
  background: rgba(107, 114, 128, 0.2);
  color: #9ca3af;
  border: 1px solid rgba(107, 114, 128, 0.4);
}

.model-name {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.native-badge {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  text-transform: uppercase;
}

/* Radar & Comparison */
.radar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .radar-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.chart-container {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  aspect-ratio: 1;
}

/* Delta indicators */
.delta-pos {
  color: #34d399;
  font-weight: 600;
}

.delta-neg {
  color: #f87171;
  font-weight: 600;
}

.delta-neutral {
  color: var(--text-secondary);
}

/* Method card */
.prose {
  color: #d1d5db;
  line-height: 1.7;
}

.prose h3 {
  color: #ffffff;
  font-size: 1.25rem;
  margin: 1.5rem 0 0.5rem;
}

.prose h3:first-child {
  margin-top: 0;
}

.prose p {
  margin-bottom: 1rem;
}

.prose ul, .prose ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose code {
  background: var(--bg-card);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85em;
  color: #a5b4fc;
}

.prose pre {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border-color);
}

.prose pre code {
  background: transparent;
  padding: 0;
  color: #e5e7eb;
}