/* ============================================
   DESIGN TOKENS - Reference Portfolio Style
   Centralized design system variables
   ============================================ */

:root {
    /* =====================================
       COLOR SYSTEM - Deep Space Theme
       ===================================== */
    
    /* Primary Blues (Reference: #0ea5e9 cyan-500 to primary-600) */
    --color-primary-50: #f0f9ff;
    --color-primary-100: #e0f2fe;
    --color-primary-200: #bae6fd;
    --color-primary-300: #7dd3fc;
    --color-primary-400: #38bdf8;
    --color-primary-500: #0ea5e9;  /* Main blue */
    --color-primary-600: #0284c7;  /* Darker blue */
    --color-primary-700: #0369a1;
    --color-primary-800: #075985;
    --color-primary-900: #0c4a6e;
    --color-primary-950: #082f49;
    
    /* Accent Purple (for gradients) */
    --color-purple-400: #c084fc;
    --color-purple-500: #a855f7;
    --color-purple-600: #9333ea;
    
    /* Grays - Dark Theme */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #111827;  /* Primary background */
    --color-gray-950: #020617;
    
    /* Semantic Colors */
    --color-success: #22c55e;   /* Green for "online" status */
    --color-cyan: #06b6d4;      /* Terminal text */
    --color-error: #ef4444;
    
    /* Glass-morphism Backgrounds */
    --bg-glass-light: rgba(255, 255, 255, 0.05);
    --bg-glass-medium: rgba(255, 255, 255, 0.10);
    --bg-glass-dark: rgba(0, 0, 0, 0.4);
    --bg-overlay: rgba(10, 10, 15, 0.2);
    
    /* Border Colors */
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.2);
    --border-primary: rgba(14, 165, 233, 0.5);  /* Blue border */
    
    /* =====================================
       TYPOGRAPHY SYSTEM
       ===================================== */
    
    /* Font Families */
    --font-display: 'Poppins', 'Inter', sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'Courier New', Consolas, monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */
    --text-7xl: 4.5rem;      /* 72px */
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.15em;
    
    /* =====================================
       SPACING SYSTEM
       ===================================== */
    
    --space-1: 0.25rem;    /* 4px */
    --space-2: 0.5rem;     /* 8px */
    --space-3: 0.75rem;    /* 12px */
    --space-4: 1rem;       /* 16px */
    --space-5: 1.25rem;    /* 20px */
    --space-6: 1.5rem;     /* 24px */
    --space-8: 2rem;       /* 32px */
    --space-10: 2.5rem;    /* 40px */
    --space-12: 3rem;      /* 48px */
    --space-16: 4rem;      /* 64px */
    --space-20: 5rem;      /* 80px */
    --space-24: 6rem;      /* 96px */
    
    /* =====================================
       ANIMATION SYSTEM
       ===================================== */
    
    /* Durations */
    --anim-duration-fast: 0.2s;
    --anim-duration-normal: 0.3s;
    --anim-duration-slow: 0.5s;
    --anim-duration-slower: 0.8s;
    --anim-pulse: 2s;
    --anim-scan: 4s;
    --anim-marquee-left: 40s;
    --anim-marquee-right: 50s;
    
    /* Easing Functions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.6, 1);
    
    /* =====================================
       BORDER RADIUS
       ===================================== */
    
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.375rem;   /* 6px */
    --radius-lg: 0.5rem;     /* 8px */
    --radius-xl: 0.75rem;    /* 12px */
    --radius-2xl: 1rem;      /* 16px */
    --radius-full: 9999px;
    
    /* =====================================
       SHADOWS
       ===================================== */
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Primary Glow */
    --shadow-primary: 0 0 20px rgba(14, 165, 233, 0.4);
    --shadow-primary-sm: 0 0 10px rgba(14, 165, 233, 0.3);
    
    /* =====================================
       Z-INDEX LAYERS
       ===================================== */
    
    --z-background: 0;
    --z-content: 10;
    --z-sticky: 100;
    --z-header: 500;
    --z-overlay: 1000;
    --z-modal: 2000;
    --z-tooltip: 3000;
}

/* =====================================
   GRADIENT PRESETS
   ===================================== */

.gradient-primary {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
}

.gradient-purple {
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-purple-400));
}

.gradient-text-primary {
    background: linear-gradient(to right, var(--color-primary-400), var(--color-purple-400));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

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

.backdrop-blur-sm {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.backdrop-blur-md {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.backdrop-blur-lg {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* Glass-morphism Card */
.glass-card {
    background: var(--bg-glass-dark);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
}

/* Selection Style */
::selection {
    background-color: var(--color-primary-500);
    color: white;
}

::-moz-selection {
    background-color: var(--color-primary-500);
    color: white;
}