:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #1a1a1a;
  --text-secondary: #6c757d;
  --border-color: #dee2e6;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --accent: #0066ff;
  --accent-hover: #0052cc;
}

body.dark-mode {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --border-color: #3d3d3d;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --accent: #4a9eff;
  --accent-hover: #6bb0ff;
}

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

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

#map {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

/* Top Bar */
#topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1001;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.logo-icon {
  font-size: 28px;
  line-height: 1;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

/* Stats */
.stats {
  display: flex;
  align-items: center;
  gap: 20px;
}

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

.stat-number {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 30px;
  background: var(--border-color);
}

/* Toggle Button */
.toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  font-size: 20px;
}

.toggle-btn:hover {
  background: var(--accent);
  transform: scale(1.05);
}

.toggle-btn:active {
  transform: scale(0.95);
}

.toggle-icon {
  transition: transform 0.3s ease;
}

body.dark-mode .toggle-icon {
  transform: rotate(180deg);
}

/* Leaflet Marker */
.vehicle-marker {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
  cursor: pointer;
  transition: filter 0.2s ease;
}

.vehicle-marker:hover {
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.5)) brightness(1.1);
}

/* Line Labels */
.line-label {
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 11px;
  display: inline-block;
  color: white;
  margin-top: 3px;
  user-select: none;
  letter-spacing: 0.3px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Popups */
.leaflet-popup-content-wrapper {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  padding: 0;
  overflow: hidden;
  min-width: 280px;
}

.leaflet-popup-content {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
}

.leaflet-popup-tip {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-right: none;
  border-bottom: none;
}

.popup-header {
  background: var(--bg-secondary);
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
}

.popup-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}

.popup-body {
  padding: 15px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.info-label {
  color: var(--text-secondary);
  font-size: 13px;
}

.info-value {
  font-weight: 600;
  font-size: 13px;
}

/* Station Table */
.departure-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.departure-table th {
  text-align: left;
  padding: 12px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-color);
}

.departure-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

.departure-table tr:last-child td {
  border-bottom: none;
}

.departure-table tr:hover {
  background: var(--bg-secondary);
}

.line-cell {
  font-weight: 700;
  white-space: nowrap;
}

.direction-cell {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.time-cell {
  font-weight: 600;
  white-space: nowrap;
}

.delay {
  color: #dc3545;
  font-weight: 700;
  margin-left: 4px;
}

/* Station Markers */
.station-marker {
  cursor: pointer;
}

.station-marker-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.station-marker-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 30px;
  height: 30px;
  border: 3px solid var(--accent);
  border-radius: 50%;
  animation: pulse-ring 2s ease-out infinite;
}

.station-marker-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 30px;
  height: 30px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  animation: pulse-ring 2s ease-out infinite 1s;
}

@keyframes pulse-ring {
  0% {
    width: 30px;
    height: 30px;
    opacity: 1;
  }
  100% {
    width: 60px;
    height: 60px;
    opacity: 0;
  }
}

.station-marker:hover .station-marker-icon {
  animation: station-bounce 0.5s ease;
}

@keyframes station-bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-5px);
  }
}

body.dark-mode .station-marker-icon::before,
body.dark-mode .station-marker-icon::after {
  border-color: var(--accent);
}

/* Location Marker */
.location-marker-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.location-marker-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 3px solid #27E7F5;
  border-radius: 50%;
  animation: location-pulse 2s ease-out infinite;
}

.location-marker-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid #27E7F5;
  border-radius: 50%;
  animation: location-pulse 2s ease-out infinite 1s;
}

@keyframes location-pulse {
  0% {
    width: 20px;
    height: 20px;
    opacity: 1;
  }
  100% {
    width: 50px;
    height: 50px;
    opacity: 0;
  }
}

/* Responsive */
@media (max-width: 768px) {
  #topbar {
    padding: 0 15px;
  }

  .topbar-left {
    gap: 16px;
  }

  .logo-text {
    font-size: 18px;
  }

  .stats {
    gap: 12px;
  }

  .stat-number {
    font-size: 16px;
  }

  .stat-label {
    font-size: 10px;
  }

  #map {
    top: 60px;
  }

  .leaflet-popup-content-wrapper {
    min-width: 260px;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }

  .stat-label {
    display: none;
  }

  .stat-divider {
    display: none;
  }

  .stats {
    gap: 16px;
  }
}

/* Smooth Transitions */
.leaflet-popup-content-wrapper,
.toggle-btn,
.leaflet-marker-icon {
  transition: all 0.3s ease;
}

/* Loading State */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.loading {
  animation: pulse 1.5s ease-in-out infinite;
}