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

:root {
  --bg:            #0d1117;
  --bg-card:       #161b22;
  --bg-card-hover: #1c2230;
  --bg-elevated:   #21262d;
  --border:        #30363d;
  --border-subtle: #21262d;

  --text:          #e6edf3;
  --text-muted:    #7d8590;
  --text-faint:    #484f58;

  --diesel:        #f5a623;
  --diesel-dim:    #f5a62330;
  --diesel-glow:   #f5a62318;
  --super:         #3fb950;
  --super-dim:     #3fb95030;
  --super-glow:    #3fb95018;

  --accent:        #58a6ff;
  --danger:        #f85149;
  --success:       #3fb950;

  --radius-sm:   6px;
  --radius:      10px;
  --radius-lg:   14px;
  --radius-xl:   20px;

  --shadow:      0 1px 3px rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.3);
  --shadow-card: 0 0 0 1px var(--border), 0 4px 16px rgba(0,0,0,.4);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Helvetica, Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
header {
  background: linear-gradient(180deg, #161b22 0%, #0d1117 100%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--diesel);
  flex-shrink: 0;
}

h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.last-updated {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: all .3s;
}

.badge--online  { background: var(--super-glow);  border-color: var(--super-dim);  color: var(--super);  }
.badge--offline { background: var(--bg-elevated); border-color: var(--border);     color: var(--text-muted); }
.badge--error   { background: #f8514920;           border-color: #f8514940;         color: var(--danger); }

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.badge--online .badge-dot { animation: pulse 2s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .4; }
}

/* ── Main layout ─────────────────────────────────────────────────────────── */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Section ─────────────────────────────────────────────────────────────── */
.section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.period-badge {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.7rem;
  text-transform: none;
  letter-spacing: 0;
}

/* ── Price cards ─────────────────────────────────────────────────────────── */
.price-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: background .2s, box-shadow .2s;
  cursor: default;
}

.price-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity .3s;
}

.price-card--diesel::before { background: var(--diesel-glow); }
.price-card--super::before  { background: var(--super-glow);  }

.price-card:hover::before { opacity: 1; }
.price-card:hover { box-shadow: var(--shadow); }

.price-card--diesel { border-top: 2px solid var(--diesel); }
.price-card--super  { border-top: 2px solid var(--super);  }

.card-badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.price-card--diesel .card-badge { color: var(--diesel); }
.price-card--super  .card-badge { color: var(--super);  }

.card-body {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-main {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.card-trend {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.trend-up   { background: #f8514920; color: var(--danger); }
.trend-down { background: var(--super-glow); color: var(--super); }
.trend-flat { background: var(--bg-elevated); color: var(--text-muted); }

.card-range {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  font-size: 0.8rem;
  border: 1px solid var(--border-subtle);
}

.range-item { display: flex; flex-direction: column; gap: 2px; }

.range-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
}

.range-value { font-weight: 700; font-variant-numeric: tabular-nums; }
.price-card--diesel .range-value { color: var(--diesel); }
.price-card--super  .range-value { color: var(--super);  }

.range-sep { color: var(--text-faint); flex-shrink: 0; }

.range-stations {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
  white-space: nowrap;
}

.card-time {
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--text-faint);
}

.card-cheapest {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid transparent;
}

.price-card--diesel .card-cheapest {
  background: var(--diesel-glow);
  border-color: var(--diesel-dim);
}
.price-card--super .card-cheapest {
  background: var(--super-glow);
  border-color: var(--super-dim);
}

.cheapest-icon {
  font-size: 0.85rem;
  flex-shrink: 0;
}
.price-card--diesel .cheapest-icon { color: var(--diesel); }
.price-card--super  .cheapest-icon { color: var(--super);  }

.cheapest-body {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
  flex: 1;
}

.cheapest-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
}

.cheapest-name {
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}

.cheapest-dist {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.cheapest-price {
  font-size: 1rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.price-card--diesel .cheapest-price { color: var(--diesel); }
.price-card--super  .cheapest-price { color: var(--super);  }

/* ── Stations section ────────────────────────────────────────────────────── */
.stations-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stations-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stations-col-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.station-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border-subtle);
  transition: background .1s;
}

.station-row:last-child { border-bottom: none; }
.station-row:hover { background: var(--bg-elevated); }

.station-name {
  font-size: 0.83rem;
  font-weight: 600;
  line-height: 1.3;
}

.station-address {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.3;
}

.station-dist {
  font-size: 0.7rem;
  color: var(--text-faint);
  margin-top: 2px;
}

.station-right {
  text-align: right;
  flex-shrink: 0;
}

.station-price {
  font-size: 1rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stations-col:first-child .station-price { color: var(--diesel); }
.stations-col:last-child  .station-price { color: var(--super);  }

.station-cheapest {
  font-size: 0.62rem;
  color: var(--super);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 3px;
}

/* ── Chart controls ──────────────────────────────────────────────────────── */
.chart-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.time-btns {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3px;
  gap: 2px;
}

.time-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

.time-btn:hover  { color: var(--text); background: var(--bg-card); }
.time-btn.active { color: var(--text); background: var(--bg-card); box-shadow: 0 1px 4px rgba(0,0,0,.4); }

.fuel-toggles {
  display: flex;
  gap: 6px;
}

.toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .2s;
}

.toggle-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background .2s;
}

.toggle-btn--diesel .toggle-dot { background: var(--border); }
.toggle-btn--super  .toggle-dot { background: var(--border); }

.toggle-btn--diesel.active { color: var(--diesel); border-color: var(--diesel-dim); background: var(--diesel-glow); }
.toggle-btn--diesel.active .toggle-dot { background: var(--diesel); }

.toggle-btn--super.active  { color: var(--super);  border-color: var(--super-dim);  background: var(--super-glow);  }
.toggle-btn--super.active .toggle-dot { background: var(--super); }

/* ── Chart wrapper ───────────────────────────────────────────────────────── */
.chart-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  height: 340px;
}

#priceChart { width: 100% !important; height: 100% !important; }

.chart-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  z-index: 10;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Span info ───────────────────────────────────────────────────────────── */
.span-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.span-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
}

.span-card--diesel { border-left: 3px solid var(--diesel); }
.span-card--super  { border-left: 3px solid var(--super);  }

.span-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.span-card--diesel .span-title { color: var(--diesel); }
.span-card--super  .span-title { color: var(--super);  }

.span-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.span-grid > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 6px;
  font-size: 0.82rem;
}

.span-grid > div:last-child { border-bottom: none; padding-bottom: 0; }

.sl { color: var(--text-muted); }
.sv { font-weight: 600; font-variant-numeric: tabular-nums; }

/* ── Stats grid ──────────────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}

.stat-fuel-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.stat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.stat-dot--diesel { background: var(--diesel); box-shadow: 0 0 6px var(--diesel); }
.stat-dot--super  { background: var(--super);  box-shadow: 0 0 6px var(--super);  }

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.stat-item { text-align: center; }

.stat-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-value--main { font-size: 1.3rem; }
.stat-card--diesel .stat-value--main { color: var(--diesel); }
.stat-card--super  .stat-value--main { color: var(--super);  }

/* ── Table ───────────────────────────────────────────────────────────────── */
.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
}
.btn-link:hover { text-decoration: underline; }

.table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.data-table thead th {
  padding: 10px 14px;
  text-align: left;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  white-space: nowrap;
}

.data-table tbody tr {
  border-bottom: 1px solid var(--border-subtle);
  transition: background .1s;
}

.data-table tbody tr:last-child { border-bottom: none; }
.data-table tbody tr:hover { background: var(--bg-elevated); }

.data-table tbody td {
  padding: 9px 14px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.fuel-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
}

.fuel-pill--diesel { background: var(--diesel-dim); color: var(--diesel); }
.fuel-pill--super  { background: var(--super-dim);  color: var(--super);  }

.table-empty {
  padding: 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 14px 20px;
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 0.72rem;
  color: var(--text-faint);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .price-cards  { grid-template-columns: 1fr; }
  .stats-grid   { grid-template-columns: 1fr; }
  .span-info    { grid-template-columns: 1fr; }

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

  .price-main { font-size: 1.9rem; }

  .chart-wrapper { height: 260px; }

  .header-inner { flex-wrap: wrap; }

  .chart-controls { flex-direction: column; align-items: flex-start; }

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

  .data-table thead th:nth-child(6),
  .data-table tbody td:nth-child(6) { display: none; }
}

@media (max-width: 420px) {
  .time-btn { padding: 5px 8px; font-size: 0.72rem; }
  h1 { font-size: 1.05rem; }
  .last-updated { display: none; }
}