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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --border: #2a2a3a;
  --border-accent: #3a3a5a;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #555570;
  --accent-red: #e10600;
  --accent-red-dim: #b80500;
  --accent-green: #00d47e;
  --accent-yellow: #f5c518;
  --accent-blue: #2196f3;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 8px;
  --radius-sm: 4px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Header / Nav ─────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
}

.logo-f1 {
  color: var(--accent-red);
}

.logo-pitwall {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-meta {
  margin-left: auto;
}

.update-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ── Status Bar ───────────────────────────────────────── */
.status-bar {
  max-width: 1200px;
  margin: 24px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.status-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

/* ── Sections ─────────────────────────────────────────── */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

.section-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  border-left: 3px solid var(--accent-red);
  padding-left: 12px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
  max-width: 720px;
}

/* ── Optimal Team Card ────────────────────────────────── */
.optimal-team {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
}

.team-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(225, 6, 0, 0.08), transparent);
}

.team-stats {
  display: flex;
  gap: 40px;
}

.team-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
}

.team-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 0;
}

.team-section {
  padding: 20px 24px;
}

.team-section:first-child {
  border-right: 1px solid var(--border);
}

.team-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.team-drivers,
.team-constructors {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.team-driver-row,
.team-constructor-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.driver-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.driver-pos {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  width: 28px;
}

.driver-name {
  font-weight: 600;
  font-size: 14px;
}

.driver-team-tag {
  font-size: 11px;
  color: var(--text-secondary);
}

.driver-stats {
  display: flex;
  gap: 16px;
  align-items: center;
}

.driver-price,
.driver-pts {
  font-family: var(--font-mono);
  font-size: 13px;
}

.driver-price { color: var(--text-secondary); }
.driver-pts { color: var(--accent-green); font-weight: 600; }

/* ── Alternative Teams ────────────────────────────────── */
.alt-teams-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.alt-teams-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.alt-teams-card h3 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.alt-team-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.alt-team-item:last-child { border-bottom: none; }

.alt-team-rank {
  font-family: var(--font-mono);
  color: var(--accent-red);
  font-weight: 700;
  margin-right: 8px;
}

.alt-team-pts {
  font-family: var(--font-mono);
  color: var(--accent-green);
  font-weight: 600;
}

.alt-team-cost {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 12px;
}

.alt-team-drivers {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 4px;
}

.alt-team-constructors {
  color: var(--text-muted);
  font-size: 11px;
}

/* ── Data Tables ──────────────────────────────────────── */
.table-container {
  overflow-x: auto;
  margin-bottom: 32px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table thead {}

.data-table th {
  text-align: left;
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 13px;
}

.data-table tbody tr {
  transition: background 0.15s;
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.tier-star {
  color: var(--accent-yellow);
  font-size: 12px;
}

.tier-col { text-align: center; }

.capture-high { color: var(--accent-green); }
.capture-mid { color: var(--accent-yellow); }
.capture-low { color: var(--accent-red); }

.bias-positive { color: var(--accent-green); }
.bias-negative { color: var(--accent-red); }
.bias-neutral { color: var(--text-secondary); }

.value-highlight {
  background: rgba(0, 212, 126, 0.08);
}

/* ── Backtest Summary ─────────────────────────────────── */
.backtest-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.backtest-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.backtest-stat .stat-value {
  display: block;
  font-size: 28px;
  margin-bottom: 4px;
}

.backtest-stat .stat-label {
  display: block;
}

/* ── Calibration Chart ────────────────────────────────── */
.calibration-chart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
}

.cal-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.cal-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  width: 32px;
  text-align: right;
}

.cal-bar-track {
  flex: 1;
  height: 20px;
  background: var(--bg-secondary);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.cal-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

.cal-bar-value {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  width: 48px;
}

/* ── Methodology ──────────────────────────────────────── */
.method-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.method-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.method-card.full-width {
  grid-column: 1 / -1;
  margin-bottom: 16px;
}

.method-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--accent-red);
  opacity: 0.6;
  margin-bottom: 8px;
}

.method-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.method-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* Weight bars */
.weight-bars {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.weight-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.weight-label {
  font-size: 12px;
  color: var(--text-secondary);
  width: 100px;
}

.weight-track {
  flex: 1;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.weight-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-red-dim));
  border-radius: 4px;
}

.weight-pct {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  width: 32px;
}

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

.scoring-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-red);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.scoring-table {
  width: 100%;
  font-size: 12px;
}

.scoring-table td {
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
}

.scoring-table td:first-child {
  color: var(--text-secondary);
}

.scoring-table td:last-child {
  font-family: var(--font-mono);
  text-align: right;
  color: var(--text-primary);
}

.limitations-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.limitations-list li {
  color: var(--text-secondary);
  font-size: 14px;
  padding-left: 16px;
  position: relative;
}

.limitations-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--accent-red);
  border-radius: 50%;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  margin-top: 40px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-sep {
  margin: 0 12px;
  opacity: 0.3;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 768px) {
  .status-bar {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .team-section:first-child {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .alt-teams-row {
    grid-template-columns: 1fr;
  }

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

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

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

  .nav-links { display: none; }
}

/* Changelog */
.changelog {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.changelog-entry {
  border-left: 2px solid var(--accent, #e04040);
  padding-left: 16px;
}

.changelog-version {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.changelog-date {
  font-weight: 400;
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 8px;
}

.changelog-entry ul {
  margin: 0;
  padding-left: 18px;
}

.changelog-entry li {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 4px;
}

.changelog-entry li strong {
  color: var(--text-primary);
}