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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow: hidden;
}

#map {
  width: 100vw;
  height: 100vh;
  background: #0f172a;
}

#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
}

.logo {
  color: #f8fafc;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.header-actions {
  display: flex;
  gap: 10px;
}

.header-btn {
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #f8fafc;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.header-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: scale(1.03);
}

.header-btn.tour {
  background: rgba(37, 99, 235, 0.8);
}

.header-btn.tour:hover {
  background: rgba(37, 99, 235, 1);
}

.header-btn.tour.active {
  background: rgba(239, 68, 68, 0.8);
}

.header-btn.tour.active:hover {
  background: rgba(239, 68, 68, 1);
}

/* Layers dropdown */
.layers-wrapper {
  position: relative;
}

#layers-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  padding: 6px;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  display: none;
  z-index: 11;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

#layers-dropdown.open {
  display: block;
}

#layers-dropdown label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  color: #f8fafc;
  font-size: 13px;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s;
  user-select: none;
}

#layers-dropdown label:hover {
  background: rgba(255, 255, 255, 0.08);
}

#layers-dropdown input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: #3b82f6;
  flex-shrink: 0;
}

/* Controls legend */
#controls-legend {
  position: fixed;
  bottom: 24px;
  left: 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 8px;
  z-index: 6;
}

.legend-row {
  color: #94a3b8;
  font-size: 11px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-row kbd {
  display: inline-block;
  padding: 1px 5px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  font-family: inherit;
  font-size: 10px;
  color: #cbd5e1;
  min-width: 32px;
  text-align: center;
}

/* Trail Cards */
#trail-cards {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 5;
  padding: 0 24px;
}

.trail-card {
  width: 220px;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 2px solid transparent;
  flex-shrink: 0;
}

.trail-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.trail-card.active {
  border-color: var(--trail-color);
  box-shadow: 0 0 20px color-mix(in srgb, var(--trail-color) 40%, transparent);
}

.trail-card-image {
  width: 100%;
  height: 100px;
  object-fit: cover;
}

.trail-card-body {
  padding: 10px 12px;
  color: #f8fafc;
}

.trail-card-name {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.3;
}

.trail-card-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  color: #94a3b8;
}

.difficulty-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Info Panel */
#info-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow-y: auto;
  z-index: 15;
  transition: right 0.3s ease;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
}

#info-panel.open {
  right: 0;
}

.panel-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(15, 23, 42, 0.8);
  color: #f8fafc;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: background 0.2s;
}

.panel-close:hover {
  background: rgba(30, 41, 59, 0.9);
}

.panel-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.panel-content {
  padding: 20px;
}

.panel-content h2 {
  color: #f8fafc;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}

.panel-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
  padding: 16px;
  background: rgba(30, 41, 59, 0.6);
  border-radius: 10px;
}

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

.stat-value {
  color: #38bdf8;
  font-size: 14px;
  font-weight: 600;
}

.stat-label {
  color: #94a3b8;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.panel-description {
  color: #cbd5e1;
  font-size: 14px;
  line-height: 1.6;
  margin: 16px 0;
}

.panel-highlights {
  margin: 16px 0;
}

.panel-highlights h3 {
  color: #f8fafc;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.panel-highlights ul {
  list-style: none;
  padding: 0;
}

.panel-highlights li {
  color: #cbd5e1;
  font-size: 13px;
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.panel-highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--trail-color, #38bdf8);
}

.panel-cta {
  display: block;
  width: 100%;
  padding: 14px;
  margin-top: 20px;
  background: #2563eb;
  color: #ffffff;
  text-align: center;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  transition: background 0.2s;
}

.panel-cta:hover {
  background: #1d4ed8;
}

/* Elevation Profile */
#elevation-profile {
  position: fixed;
  bottom: 200px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 120px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 12px;
  z-index: 6;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 12px;
}

#elevation-profile.visible {
  opacity: 1;
  pointer-events: auto;
}

/* Tour Overlay */
#tour-overlay {
  position: fixed;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-size: 36px;
  font-weight: 700;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7), 0 0 40px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
  z-index: 20;
  text-align: center;
  letter-spacing: 0.01em;
  max-width: 80vw;
}

#tour-overlay.visible {
  opacity: 1;
}

/* Opening animation - fade in UI elements */
#trail-cards, #header {
  opacity: 0;
  transition: opacity 0.8s ease;
}

#trail-cards.visible, #header.visible {
  opacity: 1;
}

/* Bottom gradient for card readability */
.bottom-gradient {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.4) 0%, transparent 100%);
  pointer-events: none;
  z-index: 4;
}

@media (max-width: 768px) {
  #trail-cards {
    left: 0;
    transform: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 0 12px;
    bottom: 12px;
    width: 100%;
  }
  .trail-card {
    scroll-snap-align: start;
    min-width: 180px;
    width: 180px;
  }

  #info-panel {
    top: auto;
    right: 0;
    bottom: -100%;
    left: 0;
    width: 100%;
    max-width: 100%;
    height: 70vh;
    border-radius: 16px 16px 0 0;
    transition: bottom 0.3s ease;
  }
  #info-panel.open {
    bottom: 0;
  }

  #elevation-profile {
    width: calc(100% - 24px);
    bottom: 210px;
    height: 100px;
  }

  #tour-overlay {
    font-size: 24px;
  }

  #controls-legend {
    display: none;
  }
}