/* AirGuard Design System - Glassmorphism + Signal Wave Animations */

:root {
  /* Colors */
  --color-primary: #00d4aa;
  --color-primary-dark: #00b894;
  --color-secondary: #0984e3;
  --color-accent: #fd79a8;
  --color-success: #00b894;
  --color-warning: #fdcb6e;
  --color-error: #d63031;
  --color-info: #74b9ff;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-bg-strong: rgba(255, 255, 255, 0.2);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  
  /* Dark Mode */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --text-primary: #ffffff;
  --text-secondary: #b2bec3;
  
  /* AQI Colors */
  --aqi-good: #00e400;
  --aqi-moderate: #ffff00;
  --aqi-sensitive: #ff7e00;
  --aqi-unhealthy: #ff0000;
  --aqi-very-unhealthy: #8f3f97;
  --aqi-hazardous: #7e0023;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 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: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(0, 212, 170, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

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

body {
  font-family: var(--font-family);
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* Glassmorphism Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

.glass-card:hover {
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
  transition: var(--transition-normal);
}

/* 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%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 170, 0.5);
}

.btn-secondary {
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Navigation */
.nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-around;
  z-index: 1000;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  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: var(--glass-bg);
}

.nav-item:hover {
  color: var(--color-primary);
  background: var(--glass-bg-strong);
}

.nav-icon {
  font-size: 24px;
}

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

.aqi-good { background: rgba(0, 228, 0, 0.2); color: var(--aqi-good); }
.aqi-moderate { background: rgba(255, 255, 0, 0.2); color: var(--aqi-moderate); }
.aqi-sensitive { background: rgba(255, 126, 0, 0.2); color: var(--aqi-sensitive); }
.aqi-unhealthy { background: rgba(255, 0, 0, 0.2); color: var(--aqi-unhealthy); }
.aqi-very-unhealthy { background: rgba(143, 63, 151, 0.2); color: var(--aqi-very-unhealthy); }
.aqi-hazardous { background: rgba(126, 0, 35, 0.2); color: var(--aqi-hazardous); }

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

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

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

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

.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-md);
  padding: var(--spacing-md);
  background: var(--glass-bg);
  border-radius: var(--radius-md);
}

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

.achievement-info {
  flex: 1;
}

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

.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-secondary));
  border-radius: var(--radius-full);
  transition: var(--transition-slow);
}

/* Map Marker */
.map-marker {
  position: relative;
  width: 32px;
  height: 32px;
  background: var(--glass-bg-strong);
  border: 2px solid var(--glass-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;
}

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

/* Responsive */
@media (max-width: 768px) {
  :root {
    --font-size-md: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
  }
  
  .nav {
    padding: var(--spacing-sm);
  }
  
  .nav-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 10px;
  }
  
  .nav-icon {
    font-size: 20px;
  }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}