/* ============================================
   DESIGN TOKENS - IoT Backbone Standard
   shadcn/ui Color System
   ============================================ */

/* CSS Variables for Glassmorphism UI */
:root {
  /* ===== COLORS ===== */
  
  /* Primary - Blue */
  --color-primary: #2563eb;
  --color-primary-foreground: #ffffff;
  --color-primary-hover: #1d4ed8;
  --color-primary-active: #1e40af;
  
  /* Secondary - Gray */
  --color-secondary: #64748b;
  --color-secondary-foreground: #ffffff;
  --color-secondary-hover: #475569;
  --color-secondary-active: #334155;
  
  /* Success - Green */
  --color-success: #10b981;
  --color-success-foreground: #ffffff;
  --color-success-hover: #059669;
  --color-success-active: #047857;
  
  /* Warning - Yellow */
  --color-warning: #f59e0b;
  --color-warning-foreground: #ffffff;
  --color-warning-hover: #d97706;
  --color-warning-active: #b45309;
  
  /* Destructive - Red */
  --color-destructive: #ef4444;
  --color-destructive-foreground: #ffffff;
  --color-destructive-hover: #dc2626;
  --color-destructive-active: #b91c1c;
  
  /* Backgrounds */
  --color-background: #0f172a;
  --color-foreground: #f8fafc;
  --color-card: #1e293b;
  --color-card-foreground: #f1f5f9;
  --color-border: #334155;
  --color-input: #1e293b;
  --color-ring: #3b82f6;
  
  /* Signal Strength Colors */
  --signal-excellent: #10b981;
  --signal-good: #22c55e;
  --signal-fair: #f59e0b;
  --signal-poor: #ef4444;
  --signal-none: #6b7280;
  
  /* Terrain Colors */
  --terrain-mountain: #8b5cf6;
  --terrain-city: #f59e0b;
  --terrain-forest: #10b981;
  
  /* ===== TYPOGRAPHY ===== */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* ===== SPACING ===== */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  
  /* ===== BORDER RADIUS ===== */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* ===== SHADOWS ===== */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* ===== GLASSMORPHISM ===== */
  --glass-bg: rgba(30, 41, 59, 0.8);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 12px;
  
  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* ===== Z-INDEX ===== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --color-background: #0f172a;
  --color-foreground: #f8fafc;
  --color-card: #1e293b;
  --color-card-foreground: #f1f5f9;
  --color-border: #334155;
  --color-input: #1e293b;
}

/* Light Theme */
[data-theme="light"] {
  --color-background: #ffffff;
  --color-foreground: #0f172a;
  --color-card: #f8fafc;
  --color-card-foreground: #1e293b;
  --color-border: #e2e8f0;
  --color-input: #f1f5f9;
}

/* ===== UTILITY CLASSES ===== */

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

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

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

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

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

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

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

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

/* Signal Badge */
.signal-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

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

.signal-badge.good {
  background: rgba(34, 197, 94, 0.2);
  color: var(--signal-good);
  border: 1px solid var(--signal-good);
}

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

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

/* Terrain Badge */
.terrain-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
}

.terrain-badge.mountain {
  background: rgba(139, 92, 246, 0.2);
  color: var(--terrain-mountain);
  border: 1px solid var(--terrain-mountain);
}

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

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

/* Card Component */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  transition: border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--color-ring);
}

.card-header {
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-card-foreground);
  margin-bottom: var(--spacing-1);
}

.card-description {
  font-size: var(--font-size-sm);
  color: #94a3b8;
}

/* Grid Layout */
.grid {
  display: grid;
  gap: var(--spacing-4);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Flex Utilities */
.flex {
  display: flex;
}

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

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

.justify-center {
  justify-content: center;
}

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

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

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

.gap-6 {
  gap: var(--spacing-6);
}

/* Text Utilities */
.text-center {
  text-align: center;
}

.text-sm {
  font-size: var(--font-size-sm);
}

.text-lg {
  font-size: var(--font-size-lg);
}

.text-xl {
  font-size: var(--font-size-xl);
}

.text-2xl {
  font-size: var(--font-size-2xl);
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

/* Spacing Utilities */
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.p-2 { padding: var(--spacing-2); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* Animations */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Responsive visibility */
@media (max-width: 640px) {
  .hidden-sm {
    display: none;
  }
}

@media (min-width: 641px) and (max-width: 768px) {
  .hidden-md {
    display: none;
  }
}

@media (min-width: 769px) {
  .hidden-lg {
    display: none;
  }
}