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

/* ── VARIABLES (Beaver pattern) ── */
:root {
  --bg: #0c0a09;
  --bg-warm: #120f0d;
  --surface: #1a1614;
  --surface-h: #211c19;
  --border: #2a2320;
  --border-h: #3d3430;
  --text-1: #faf6f1;
  --text-2: #a8997f;
  --text-3: #6b5e4f;
  --amber: #f59e0b;
  --amber-dim: #b45309;
  --amber-glow: rgba(245, 158, 11, .12);
  --amber-subtle: rgba(245, 158, 11, .06);
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, .15);
  --yellow: #eab308;
  --yellow-dim: rgba(234, 179, 8, .15);
  --red: #ef4444;
  --red-dim: rgba(239, 68, 68, .15);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,.3);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── GRAIN TEXTURE ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: rgba(12, 10, 9, .9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-1);
}

.nav-logo svg { width: 28px; height: 28px; }

.nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.03em;
}

.nav-brand span { color: var(--amber); }

.nav-meta {
  font-size: .8rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-badge {
  background: var(--amber-glow);
  color: var(--amber);
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
  font-size: .75rem;
}

.nav-separator { opacity: .3; }
.nav-update { font-size: .75rem; }

/* ── HERO ── */
.hero {
  padding: 100px 24px 48px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.hero-title span { color: var(--amber); }

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-2);
  margin-bottom: 32px;
}

.hero-subtitle strong { color: var(--amber); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-label {
  font-size: .7rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-1);
}

.stat-unit {
  font-size: .7rem;
  color: var(--text-2);
}

/* ── CONTROLS BAR ── */
.controls-bar {
  position: sticky;
  top: 56px;
  z-index: 500;
  background: rgba(12, 10, 9, .95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
}

.controls-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Search */
.search-group {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  gap: 8px;
  transition: border-color .2s;
}

.search-input-wrap:focus-within {
  border-color: var(--amber-dim);
}

.search-icon { color: var(--text-3); flex-shrink: 0; }

.search-input-wrap input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-1);
  font-size: .9rem;
  padding: 10px 0;
  outline: none;
  font-family: inherit;
}

.search-input-wrap input::placeholder { color: var(--text-3); }

.btn-geo {
  background: transparent;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: color .2s, background .2s;
  display: flex;
}

.btn-geo:hover { color: var(--amber); background: var(--amber-subtle); }
.btn-geo.active { color: var(--amber); }

/* Search suggestions */
.search-suggestions {
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  margin-top: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  max-height: 240px;
  overflow-y: auto;
  display: none;
  z-index: 600;
}

.search-suggestions.visible { display: block; }

.search-suggestion {
  padding: 10px 14px;
  cursor: pointer;
  font-size: .85rem;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  transition: background .15s;
}

.search-suggestion:last-child { border-bottom: none; }
.search-suggestion:hover { background: var(--surface-h); color: var(--text-1); }

/* Fuel tabs */
.fuel-tabs {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.fuel-tab {
  background: transparent;
  border: none;
  color: var(--text-3);
  font-size: .78rem;
  font-weight: 500;
  padding: 7px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
  white-space: nowrap;
}

.fuel-tab:hover { color: var(--text-2); }

.fuel-tab.active {
  background: var(--amber);
  color: #000;
  font-weight: 600;
}

/* Radius */
.radius-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  color: var(--text-2);
}

.radius-group select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-1);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-family: inherit;
  cursor: pointer;
}

/* ── APP LAYOUT ── */
.app-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  max-width: 1400px;
  margin: 0 auto;
  min-height: 600px;
}

/* Map */
.map-container {
  position: relative;
  min-height: 600px;
}

#map {
  width: 100%;
  height: 100%;
  min-height: 600px;
  background: var(--bg-warm);
}

/* Dark map tiles */
.leaflet-tile-pane { filter: brightness(.85) contrast(1.1) saturate(.8); }
.leaflet-control-zoom a {
  background: var(--surface) !important;
  color: var(--text-1) !important;
  border-color: var(--border) !important;
}

.leaflet-popup-content-wrapper {
  background: var(--surface) !important;
  color: var(--text-1) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-sm) !important;
  box-shadow: var(--shadow) !important;
}

.leaflet-popup-tip { background: var(--surface) !important; }

.leaflet-popup-content {
  margin: 12px 14px !important;
  font-family: 'Inter', sans-serif !important;
  font-size: .85rem !important;
  line-height: 1.5 !important;
}

.map-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(12, 10, 9, .8);
  z-index: 400;
  gap: 12px;
  color: var(--text-2);
  font-size: .9rem;
}

.map-loading.hidden { display: none; }

.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

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

/* ── SIDEBAR ── */
.sidebar {
  background: var(--bg-warm);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
}

.sidebar-count {
  font-size: .75rem;
  color: var(--text-3);
}

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.sidebar-empty {
  padding: 32px 16px;
  text-align: center;
  color: var(--text-3);
  font-size: .85rem;
}

/* Station card */
.station-card {
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}

.station-card:hover {
  border-color: var(--border-h);
  background: var(--surface-h);
}

.station-card.active {
  border-color: var(--amber-dim);
  background: var(--amber-subtle);
}

.station-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 6px;
}

.station-name {
  font-weight: 600;
  font-size: .85rem;
  line-height: 1.3;
  flex: 1;
}

.station-price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-left: 12px;
  white-space: nowrap;
}

.station-price.cheap { color: var(--green); }
.station-price.mid { color: var(--yellow); }
.station-price.expensive { color: var(--red); }

.station-meta {
  font-size: .75rem;
  color: var(--text-3);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.station-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.station-savings {
  font-size: .75rem;
  color: var(--green);
  margin-top: 4px;
  font-weight: 500;
}

/* Rank number */
.station-rank {
  font-family: 'Space Grotesk', sans-serif;
  font-size: .7rem;
  font-weight: 700;
  color: var(--amber);
  background: var(--amber-glow);
  width: 22px; height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 10px;
}

/* ── SAVINGS PANEL ── */
.savings-panel {
  border-top: 1px solid var(--border);
  padding: 16px 18px;
  background: var(--surface);
}

.savings-panel h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.savings-config {
  margin-bottom: 12px;
}

.savings-config label {
  font-size: .8rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 10px;
}

.savings-config input[type="range"] {
  flex: 1;
  accent-color: var(--amber);
}

.savings-result {
  font-size: .85rem;
  line-height: 1.5;
}

.savings-amount {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--green);
}

.savings-negative { color: var(--red); }

/* ── POPUP ── */
.popup-name {
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 4px;
}

.popup-price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 6px;
}

.popup-detail {
  font-size: .78rem;
  color: var(--text-2);
  margin-bottom: 2px;
}

/* ── FAQ ── */
.faq-section {
  padding: 64px 24px;
  border-top: 1px solid var(--border);
}

.faq-inner {
  max-width: 900px;
  margin: 0 auto;
}

.faq-inner h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
  text-align: center;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 18px;
  cursor: pointer;
  font-weight: 500;
  font-size: .9rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background .2s;
}

.faq-item summary:hover { background: var(--surface-h); }

.faq-item summary::after {
  content: '+';
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  color: var(--text-3);
  transition: transform .2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--amber);
}

.faq-item p {
  padding: 0 18px 16px;
  font-size: .85rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* ── FOOTER ── */
.footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: .78rem;
  color: var(--text-3);
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── MARKER CLUSTER COLORS ── */
.marker-cluster-small {
  background-color: rgba(34, 197, 94, .3) !important;
}
.marker-cluster-small div {
  background-color: rgba(34, 197, 94, .6) !important;
  color: #fff !important;
  font-family: 'Space Grotesk', sans-serif !important;
  font-weight: 600 !important;
}

.marker-cluster-medium {
  background-color: rgba(234, 179, 8, .3) !important;
}
.marker-cluster-medium div {
  background-color: rgba(234, 179, 8, .6) !important;
  color: #fff !important;
  font-family: 'Space Grotesk', sans-serif !important;
  font-weight: 600 !important;
}

.marker-cluster-large {
  background-color: rgba(239, 68, 68, .3) !important;
}
.marker-cluster-large div {
  background-color: rgba(239, 68, 68, .6) !important;
  color: #fff !important;
  font-family: 'Space Grotesk', sans-serif !important;
  font-weight: 600 !important;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 350px;
  }

  .map-container { min-height: 400px; }
  #map { min-height: 400px; }

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

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

  .controls-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .fuel-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .radius-group {
    justify-content: flex-end;
  }
}

@media (max-width: 480px) {
  .hero { padding: 80px 16px 32px; }
  .hero-title { font-size: 1.5rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-value { font-size: 1.2rem; }
  .nav { padding: 0 16px; }
  .nav-meta { display: none; }
  .controls-bar { padding: 10px 12px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ── Scrollbar ── */
.sidebar-list::-webkit-scrollbar { width: 6px; }
.sidebar-list::-webkit-scrollbar-track { background: transparent; }
.sidebar-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.sidebar-list::-webkit-scrollbar-thumb:hover { background: var(--border-h); }