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

:root {
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 12px;
}

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

body {
  background: #ffffff;
  color: var(--slate-800);
  font-family: 'Inter', -apple-system, sans-serif;
  line-height: 1.5;
}

.mono, .kpi-price, .ticker-value, td.mono {
  font-family: 'JetBrains Mono', monospace;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--slate-200);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--slate-900);
}

.logo-dot {
  color: var(--slate-400);
}

.main-nav {
  display: flex;
  gap: 24px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--slate-600);
}

.main-nav a:hover {
  color: var(--slate-900);
}


/* Ticker */
.ticker {
  background: var(--slate-900);
  color: #fff;
  font-size: 0.85rem;
}

.ticker-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 40px;
  overflow-x: auto;
  white-space: nowrap;
}

.ticker-item {
  display: flex;
  gap: 6px;
  align-items: baseline;
}

.ticker-label {
  color: var(--slate-400);
}

.ticker-value {
  font-weight: 600;
}

.ticker-time {
  margin-left: auto;
  color: var(--slate-400);
  flex-shrink: 0;
}

/* Card base */
.card {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius);
  padding: 24px;
}

.card-header {
  margin-bottom: 16px;
}

.card-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Filters */
.filters {
  display: flex;
  gap: 16px;
  margin: 32px 0;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-group label {
  font-size: 0.8rem;
  color: var(--slate-500);
  font-weight: 500;
}

.filter-group select {
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.9rem;
  background: #fff;
  min-width: 160px;
}

/* KPI cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

a.kpi-card {
  display: block;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

a.kpi-card:hover {
  border-color: var(--slate-400);
  transform: translateY(-2px);
}

.kpi-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.kpi-name {
  font-weight: 600;
  color: var(--slate-600);
}

.kpi-change {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}

.kpi-change.up {
  color: var(--red);
  background: #fee2e2;
}

.kpi-change.down {
  color: var(--green);
  background: #dcfce7;
}

.kpi-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--slate-900);
}

.kpi-unit {
  font-size: 1rem;
  color: var(--slate-400);
  font-weight: 500;
}

.kpi-sub {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--slate-500);
}

/* Chart card */
.chart-card {
  margin-bottom: 24px;
}

/* Regions */
.regions-section {
  margin-bottom: 24px;
}

.regions-section h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.regions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.region-list-card h3,
.region-finder-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.region-list li {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--slate-200);
}

.region-list li b {
  font-family: 'JetBrains Mono', monospace;
  color: var(--red);
}

.region-list.cheap li b {
  color: var(--green);
}

.note {
  font-size: 0.8rem;
  color: var(--slate-500);
  margin-top: 12px;
}

/* Compare table */
.compare-card {
  margin-bottom: 24px;
}

.table-scroll {
  overflow-x: auto;
}

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

.compare-table th {
  text-align: left;
  color: var(--slate-500);
  font-weight: 500;
  font-size: 0.8rem;
  padding: 8px 12px;
  border-bottom: 1px solid var(--slate-200);
  white-space: nowrap;
}

.compare-table td {
  padding: 12px;
  border-bottom: 1px solid var(--slate-200);
  white-space: nowrap;
}

.compare-table td.up {
  color: var(--red);
}

.compare-table td.down {
  color: var(--green);
}

.compare-table td a {
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.compare-table td a:hover {
  border-bottom-color: var(--slate-500);
}

/* Analytics text */
.analytics-text {
  margin-bottom: 24px;
}

.analytics-text h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.analytics-text h2:not(:first-child) {
  margin-top: 24px;
}

.analytics-text p {
  margin-bottom: 12px;
  color: var(--slate-600);
  font-size: 0.95rem;
}

.analytics-text p.note {
  font-size: 0.8rem;
  color: var(--slate-500);
}

.analytics-text p:last-child {
  margin-bottom: 0;
}

/* FAQ */
.faq-section {
  margin-bottom: 48px;
}

.faq-section h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.faq-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--slate-200);
}

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

.faq-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.faq-item p {
  font-size: 0.9rem;
  color: var(--slate-600);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--slate-200);
  padding-top: 32px;
  margin-top: 48px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 24px;
}

.footer-col h4 {
  font-size: 0.85rem;
  color: var(--slate-500);
  margin-bottom: 10px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--slate-600);
  padding: 3px 0;
}

.footer-col p {
  font-size: 0.85rem;
  color: var(--slate-500);
  margin-top: 6px;
}

.copyright {
  border-top: 1px solid var(--slate-200);
  padding: 16px 24px;
  font-size: 0.8rem;
  color: var(--slate-400);
}

/* Responsive */
@media (max-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .regions-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
    gap: 12px;
  }
  .kpi-grid {
    grid-template-columns: 1fr;
  }
  .filters {
    flex-direction: column;
  }
  .footer-inner {
    flex-direction: column;
  }
}

/* Fuel page: breadcrumbs */
.breadcrumbs {
  display: flex;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--slate-500);
  margin: 20px 0 8px;
}

.breadcrumbs a:hover {
  color: var(--slate-900);
}

.breadcrumbs .sep {
  color: var(--slate-400);
}

/* Fuel page: hero */
.fuel-hero {
  margin-bottom: 24px;
}

.fuel-hero h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.fuel-hero .updated {
  font-size: 0.85rem;
  color: var(--slate-500);
  margin-bottom: 20px;
}

.fuel-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
}

.fuel-stat-row.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 640px) {
  .fuel-stat-row.grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.fuel-stat {
  text-align: left;
}

.fuel-stat .label {
  font-size: 0.8rem;
  color: var(--slate-500);
  margin-bottom: 6px;
}

.fuel-stat .value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 700;
}

.fuel-stat .value.big {
  font-size: 2.2rem;
}

.fuel-stat .value.up {
  color: var(--red);
}

.fuel-stat .value.down {
  color: var(--green);
}

/* Period switch */
.period-switch {
  display: flex;
  gap: 8px;
}

.period-switch button {
  border: 1px solid var(--slate-200);
  background: #fff;
  border-radius: 8px;
  padding: 6px 14px;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--slate-600);
}

.period-switch button.active {
  background: var(--slate-900);
  color: #fff;
  border-color: var(--slate-900);
}

/* Sortable region table */
.region-table th {
  cursor: pointer;
  user-select: none;
}

.region-table th:hover {
  color: var(--slate-900);
}

/* Internal links list */
.internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.internal-links a {
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--slate-600);
  background: var(--slate-50);
}

.internal-links a:hover {
  border-color: var(--slate-400);
  color: var(--slate-900);
}

.fuel-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.fuel-nav-links a {
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--slate-100);
  color: var(--slate-600);
}

.fuel-nav-links a.current {
  background: var(--slate-900);
  color: #fff;
}

@media (max-width: 640px) {
  .fuel-stat-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Calculator */
.calc-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.calc-tab {
  border: 1px solid var(--slate-200);
  background: #fff;
  border-radius: 8px;
  padding: 10px 18px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--slate-600);
}

.calc-tab.active {
  background: var(--slate-900);
  color: #fff;
  border-color: var(--slate-900);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
  align-items: start;
}

.calc-field {
  margin-bottom: 16px;
}

.calc-field label {
  display: block;
  font-size: 0.85rem;
  color: var(--slate-500);
  font-weight: 500;
  margin-bottom: 6px;
}

.calc-field input,
.calc-field select {
  width: 100%;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 1rem;
  background: #fff;
}

.calc-field input:invalid,
.calc-field.error input {
  border-color: var(--red);
}

.calc-hint {
  font-size: 0.78rem;
  color: var(--slate-500);
  margin-top: 6px;
}

.calc-error-msg {
  font-size: 0.78rem;
  color: var(--red);
  margin-top: 6px;
  display: none;
}

.calc-field.error .calc-error-msg {
  display: block;
}

.calc-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.calc-actions button {
  border-radius: 8px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--slate-200);
}

.calc-actions .btn-primary {
  background: var(--slate-900);
  color: #fff;
  border-color: var(--slate-900);
}

.calc-actions .btn-secondary {
  background: #fff;
  color: var(--slate-600);
}

.calc-result {
  background: var(--slate-900);
  color: #fff;
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 16px;
}

.calc-result-row {
  margin-bottom: 18px;
}

.calc-result-row:last-child {
  margin-bottom: 0;
}

.calc-result-label {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-bottom: 4px;
}

.calc-result-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.8rem;
  font-weight: 700;
}

.calc-result-value.small {
  font-size: 1.1rem;
}

.calc-result-sub {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 4px;
}

.consumption-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 8px;
}

.consumption-badge.eco { background: #dcfce7; color: #16a34a; }
.consumption-badge.avg { background: #fef9c3; color: #a16207; }
.consumption-badge.high { background: #ffedd5; color: #c2410c; }
.consumption-badge.veryhigh { background: #fee2e2; color: #dc2626; }

@media (max-width: 900px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .calc-result {
    position: sticky;
    bottom: 0;
    top: auto;
    box-shadow: 0 -8px 24px rgba(0,0,0,0.15);
  }
}