:root {
  --bg-dark: #0f172a;
  --bg-panel: rgba(30, 41, 59, 0.7);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
  --card-radius: 16px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.dashboard-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.header {
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header p {
  color: var(--text-muted);
  font-size: 1rem;
}

.glass-panel {
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  box-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px -4px rgba(0, 0, 0, 0.4);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(to right, #3b82f6, #8b5cf6);
  opacity: 0;
  transition: var(--transition);
}

.metric-card:hover::before {
  opacity: 1;
}

.metric-title {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
}

.chart-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.heatmap-wrapper {
  overflow-x: auto;
  padding-bottom: 1rem;
}

.heatmap-grid {
  display: grid;
  grid-template-columns: auto repeat(24, 1fr);
  gap: 4px;
  min-width: 800px;
}

.heatmap-cell {
  aspect-ratio: 1;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: white;
  transition: transform 0.2s;
  cursor: pointer;
  position: relative;
}

.heatmap-cell:hover {
  transform: scale(1.1);
  z-index: 10;
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.heatmap-label {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.heatmap-hour-label {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.heatmap-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #1e293b;
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 20;
  margin-bottom: 5px;
}

.heatmap-cell:hover .heatmap-tooltip {
  opacity: 1;
}

.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: var(--transition);
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.filter-btn.active {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border-color: #3b82f6;
}

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  gap: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: #3b82f6;
  animation: spin 1s ease-in-out infinite;
}

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

/* App Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.5rem;
}

.sidebar-header h2 {
  font-size: 1.25rem;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-link svg {
  width: 18px;
  height: 18px;
}

.nav-link.active {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Main Content Wrapper */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 2rem;
  min-height: 100vh;
  transition: margin-left 0.3s ease;
}

.dashboard-container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Sidebar Toggles (Mobile) */
.menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 90;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 8px;
  padding: 0.5rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.close-sidebar {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

/* Responsive Sidebar & Layout */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 1.5rem;
    padding-top: 4rem; /* space for toggle button */
  }
  .menu-toggle {
    display: flex;
  }
  .close-sidebar {
    display: block;
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
    padding-top: 4rem;
  }
  
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  h1 {
    font-size: 1.4rem;
  }
  
  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .data-table th, .data-table td {
    padding: 0.75rem;
    font-size: 0.85rem;
  }
  
  .chart-container {
    height: 250px !important; /* Reduce chart height on mobile */
  }
  
  .glass-panel {
    padding: 1rem;
  }

  .map-container {
    height: 400px !important;
  }

  .filters {
    flex-wrap: wrap;
  }
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th, .data-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.875rem;
}

.data-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.text-right {
  text-align: right;
}

.badge {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .dashboard-container {
    padding: 1rem;
  }
  .header h1 {
    font-size: 1.5rem;
  }
}