/* VehiData – modern responsive styles */

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-success: #059669;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --color-better: #059669;
  --color-worse: #dc2626;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 8px 30px rgba(15, 23, 42, 0.1);
  --font: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --header-h: 72px;
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
}

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

.main-nav {
  display: flex;
  gap: 0.25rem;
}

.main-nav a {
  padding: 0.5rem 0.875rem;
  text-decoration: none;
  color: var(--color-muted);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switcher {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.lang-btn {
  padding: 0.35rem 0.65rem;
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 50%, #ffffff 100%);
  padding: 4rem 0 5rem;
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-muted);
  margin: 0 0 2rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.stat-preview-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.stat-preview-row {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.stat-preview-row:last-child { border-bottom: none; }
.stat-preview-row strong {
  font-family: var(--font-mono);
  color: var(--color-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-light); }

.btn-lg { padding: 0.875rem 1.75rem; font-size: 1rem; }

/* Sections */
.section { padding: 4rem 0; }
.page-header { padding-bottom: 1.5rem; }
.page-header h1 { margin: 0 0 0.5rem; font-size: 2rem; }
.lead { font-size: 1.125rem; color: var(--color-muted); margin: 0; }

/* Rankings */
.rankings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

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

.ranking-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.ranking-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 0 0 1rem;
}

.ranking-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ranking-list li {
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.ranking-list li:last-child { border-bottom: none; }
.ranking-list a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.ranking-list a:hover { color: var(--color-primary); }
.rank-num {
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}
.rank-value {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.cta-section { padding-top: 0; }
.cta-box {
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 3rem 2rem;
  border-radius: var(--radius);
}
.cta-box h2 { margin: 0 0 0.5rem; }
.cta-box p { margin: 0 0 1.5rem; opacity: 0.9; }
.cta-box .btn-primary { background: #fff; color: var(--color-primary); }
.cta-box .btn-primary:hover { background: #f1f5f9; }

/* Forms */
.search-form { margin-bottom: 2rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--color-muted);
}

.form-group select,
.form-group input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

.form-group select:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-group select:disabled { opacity: 0.5; cursor: not-allowed; }

.form-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Results */
.search-results { min-height: 2rem; }

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

.results-header h2 { margin: 0 0 0.25rem; }
.results-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.fallback-notice {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  color: #92400e;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

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

.card h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-full { grid-column: 1 / -1; }

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.stat-row:last-child { border-bottom: none; }

.stat-value {
  font-family: var(--font-mono);
  font-weight: 500;
}

.stat-global {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-better { background: #d1fae5; color: var(--color-better); }
.badge-worse { background: #fee2e2; color: var(--color-worse); }
.badge-equal { background: #f1f5f9; color: var(--color-muted); }

.chart-wrap {
  position: relative;
  height: 220px;
  margin-top: 1rem;
}

/* Stat explanations */
.stat-explain {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
}

.stat-explain summary {
  cursor: pointer;
  color: var(--color-primary);
  font-weight: 500;
}

.stat-explain-content {
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
}

.stat-explain-content p { margin: 0.25rem 0; }

/* Compare */
.compare-slots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.compare-slot {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.compare-slot h3 { margin: 0 0 1rem; font-size: 1rem; }

.compare-results { margin-top: 2rem; }

.compare-table-wrap { overflow-x: auto; }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.compare-table th,
.compare-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.compare-table th {
  background: var(--color-bg);
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.compare-table .highlight {
  background: #ecfdf5;
  font-weight: 600;
}

.compare-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.highlight-chip {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
}

/* Admin */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.admin-stat {
  text-align: center;
  padding: 1.5rem;
}

.admin-stat .stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.admin-stat .stat-value {
  font-size: 2rem;
  color: var(--color-primary);
}

.admin-panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* Content pages */
.prose { max-width: 720px; }
.prose h2 { margin-top: 2rem; }

.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}
.alert-error {
  background: #fee2e2;
  color: var(--color-danger);
}

.loading {
  text-align: center;
  padding: 2rem;
  color: var(--color-muted);
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  margin-top: 4rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
}

.footer-brand p {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.footer-nav {
  display: flex;
  gap: 1.25rem;
}

.footer-nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.875rem;
}
.footer-nav a:hover { color: var(--color-primary); }

.footer-copy {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* Responsive */
@media (max-width: 992px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .rankings-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: 1fr; }
  .admin-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
  }

  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { flex-direction: column; gap: 0.5rem; }
}