/* AirGuard Design System - shadcn/ui Unified Design */

:root {
  /* shadcn/ui Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-destructive: #ef4444;
  --color-secondary: #64748b;
  --color-accent: #8b5cf6;
  --color-info: #06b6d4;

  /* Muted Palette */
  --color-muted: #64748b;
  --color-muted-foreground: #475569;
  --color-background: #0f172a;
  --color-foreground: #f8fafc;
  --color-card: #1e293b;
  --color-card-foreground: #f8fafc;
  --color-border: #334155;
  --color-input: #334155;
  --color-ring: #2563eb;

  /* Glassmorphism */
  --glass-bg: rgba(30, 41, 59, 0.8);
  --glass-bg-strong: rgba(30, 41, 59, 0.95);
  --glass-border: rgba(51, 65, 85, 0.5);
  --glass-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.5);

  /* AQI Colors */
  --aqi-good: #10b981;
  --aqi-moderate: #f59e0b;
  --aqi-sensitive: #f97316;
  --aqi-unhealthy: #ef4444;
  --aqi-very-unhealthy: #8b5cf6;
  --aqi-hazardous: #dc2626;

  /* Spacing (shadcn - based on 4px) */
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-7: 28px;
  --spacing-8: 32px;
  --spacing-9: 36px;
  --spacing-10: 40px;

  /* Border Radius (shadcn) */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;

  /* Shadows (shadcn) */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

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

body {
  font-family: var(--font-family);
  background: linear-gradient(135deg, var(--color-background) 0%, #1e293b 100%);
  color: var(--color-foreground);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   SHADCN/UI COMPONENTS
   ============================================ */

/* --- Card --- */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--color-border);
}

.card-content {
  padding: var(--spacing-6);
}

.card-footer {
  padding: var(--spacing-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

/* Glass Card Variant */
.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  outline: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

.btn:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-6);
  font-size: var(--font-size-md);
}

/* Button Variants */
.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background: #475569;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-foreground);
}

.btn-outline:hover {
  background: var(--color-secondary);
  color: white;
}

.btn-ghost {
  background: transparent;
  color: var(--color-foreground);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-destructive {
  background: var(--color-destructive);
  color: white;
}

.btn-destructive:hover {
  background: #dc2626;
}

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.badge-primary {
  background: rgba(37, 99, 235, 0.2);
  color: var(--color-primary-light);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-destructive {
  background: rgba(239, 68, 68, 0.2);
  color: var(--color-destructive);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-secondary {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.3);
}

.badge-outline {
  background: transparent;
  color: var(--color-foreground);
  border: 1px solid var(--color-border);
}

/* --- Input --- */
.input {
  display: flex;
  height: 40px;
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  background: var(--color-background);
  border: 1px solid var(--color-input);
  color: var(--color-foreground);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.input::placeholder {
  color: var(--color-muted);
}

/* --- Signal Wave Animation --- */
@keyframes signal-pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.5);
    opacity: 0.5;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

.signal-wave {
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
  animation: signal-pulse 2s ease-out infinite;
}

.signal-wave::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* --- AQI Badge --- */
.aqi-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.aqi-good { background: rgba(16, 185, 129, 0.2); color: var(--aqi-good); }
.aqi-moderate { background: rgba(245, 158, 11, 0.2); color: var(--aqi-moderate); }
.aqi-sensitive { background: rgba(249, 115, 22, 0.2); color: var(--aqi-sensitive); }
.aqi-unhealthy { background: rgba(239, 68, 68, 0.2); color: var(--aqi-unhealthy); }
.aqi-very-unhealthy { background: rgba(139, 92, 246, 0.2); color: var(--aqi-very-unhealthy); }
.aqi-hazardous { background: rgba(220, 38, 38, 0.2); color: var(--aqi-hazardous); }

/* --- Navigation --- */
.nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-2) var(--spacing-4);
  display: flex;
  justify-content: space-around;
  z-index: 1000;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-2) var(--spacing-4);
  color: var(--color-muted);
  text-decoration: none;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.nav-item.active {
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.1);
}

.nav-item:hover {
  color: var(--color-primary-light);
  background: rgba(37, 99, 235, 0.1);
}

.nav-icon {
  font-size: 20px;
}

/* --- Product Card --- */
.product-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-6);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.product-image {
  font-size: 48px;
  text-align: center;
  margin-bottom: var(--spacing-4);
}

.product-name {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.product-price {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

/* --- Achievement Badge --- */
.achievement-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.achievement-icon {
  font-size: 32px;
}

.achievement-info {
  flex: 1;
}

.achievement-name {
  font-weight: 600;
  margin-bottom: var(--spacing-1);
}

.achievement-progress {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.achievement-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  transition: var(--transition-slow);
}

/* --- Map Marker --- */
.map-marker {
  position: relative;
  width: 32px;
  height: 32px;
  background: var(--color-card);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.map-marker:hover {
  transform: scale(1.2);
  z-index: 10;
  border-color: var(--color-primary);
}

.map-marker .aqi-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* --- Status Indicators --- */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.status-dot.offline {
  background: var(--color-muted);
}

.status-dot.warning {
  background: var(--color-warning);
  box-shadow: 0 0 8px var(--color-warning);
}

.status-dot.error {
  background: var(--color-destructive);
  box-shadow: 0 0 8px var(--color-destructive);
}

/* --- Toast Notification --- */
.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}

.toast-destructive {
  border-left: 4px solid var(--color-destructive);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --- Utility Classes --- */
.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--spacing-2);
}

.gap-4 {
  gap: var(--spacing-4);
}

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

.text-muted {
  color: var(--color-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
  }

  .nav {
    padding: var(--spacing-2);
  }

  .nav-item {
    padding: var(--spacing-1) var(--spacing-2);
    font-size: 10px;
  }

  .nav-icon {
    font-size: 18px;
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-background);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-secondary);
}