/* ================================================
   RANGE TEST CHALLENGE - DESIGN TOKENS
   ================================================ */

/* Color Palette - IoT Professional */
:root {
  /* Primary Colors */
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  
  /* Signal Quality Colors */
  --color-excellent: #00C851;
  --color-good: #64DD17;
  --color-fair: #FFBB33;
  --color-poor: #FF4444;
  
  /* Background Colors */
  --bg-dark: #0f172a;
  --bg-medium: #1e293b;
  --bg-light: #334155;
  
  /* Glassmorphism */
  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Accent Colors */
  --accent-xp: #fbbf24;
  --accent-streak: #f97316;
  --accent-test: #3b82f6;
  
  /* Status Colors */
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Z-Index Layers */
  --z-bg: 0;
  --z-panel: 10;
  --z-header: 100;
  --z-toast: 1000;
}

/* Signal Quality Gradients */
.signal-excellent {
  background: linear-gradient(135deg, #00C851, #00E676);
  color: white;
}

.signal-good {
  background: linear-gradient(135deg, #64DD17, #76FF03);
  color: white;
}

.signal-fair {
  background: linear-gradient(135deg, #FFBB33, #FFCA28);
  color: black;
}

.signal-poor {
  background: linear-gradient(135deg, #FF4444, #FF5252);
  color: white;
}

/* Premium Card Styles */
.sub-card {
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

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

.sub-card.pro {
  border-color: var(--color-primary);
}

.sub-card.enterprise {
  border-color: var(--accent-xp);
}