/* CSS Variables System - Fully Customizable */
:root {
    /* Brand Colors */
    --color-primary: #667eea;
    --color-primary-light: #7c8ff0;
    --color-primary-dark: #5a67d8;
    --color-primary-rgb: 102, 126, 234;
    
    --color-secondary: #764ba2;
    --color-secondary-light: #8b5fb7;
    --color-secondary-dark: #67428e;
    --color-secondary-rgb: 118, 75, 162;
    
    /* Status Colors */
    --color-success: #48bb78;
    --color-success-light: #68d391;
    --color-success-dark: #38a169;
    --color-success-rgb: 72, 187, 120;
    
    --color-warning: #ed8936;
    --color-warning-light: #f6ad55;
    --color-warning-dark: #dd6b20;
    --color-warning-rgb: 237, 137, 54;
    
    --color-danger: #f56565;
    --color-danger-light: #fc8181;
    --color-danger-dark: #e53e3e;
    --color-danger-rgb: 245, 101, 101;
    
    --color-info: #4299e1;
    --color-info-light: #63b3ed;
    --color-info-dark: #3182ce;
    --color-info-rgb: 66, 153, 225;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Georgia', serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    --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;
    --font-size-5xl: 3rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    --line-height-loose: 2;
    
    /* Spacing */
    --spacing-0: 0;
    --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;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    --spacing-32: 8rem;
    
    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.125rem;
    --radius-base: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 0 0 1px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    --transition-slower: 500ms ease-in-out;
    
    /* Z-Index */
    --z-negative: -1;
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    --z-modal: 1000;
    --z-popover: 1100;
    --z-tooltip: 1200;
    --z-notification: 1300;
    
    /* Breakpoints */
    --screen-xs: 475px;
    --screen-sm: 640px;
    --screen-md: 768px;
    --screen-lg: 1024px;
    --screen-xl: 1280px;
    --screen-2xl: 1536px;
    
    /* Grid */
    --grid-cols-1: repeat(1, minmax(0, 1fr));
    --grid-cols-2: repeat(2, minmax(0, 1fr));
    --grid-cols-3: repeat(3, minmax(0, 1fr));
    --grid-cols-4: repeat(4, minmax(0, 1fr));
    --grid-cols-5: repeat(5, minmax(0, 1fr));
    --grid-cols-6: repeat(6, minmax(0, 1fr));
    --grid-cols-12: repeat(12, minmax(0, 1fr));
    
    /* Animation */
    --animation-spin: spin 1s linear infinite;
    --animation-ping: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
    --animation-pulse: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    --animation-bounce: bounce 1s infinite;
    
    /* Blur */
    --blur-sm: blur(4px);
    --blur-base: blur(8px);
    --blur-md: blur(12px);
    --blur-lg: blur(16px);
    --blur-xl: blur(24px);
    
    /* Opacity */
    --opacity-0: 0;
    --opacity-5: 0.05;
    --opacity-10: 0.1;
    --opacity-20: 0.2;
    --opacity-25: 0.25;
    --opacity-30: 0.3;
    --opacity-40: 0.4;
    --opacity-50: 0.5;
    --opacity-60: 0.6;
    --opacity-70: 0.7;
    --opacity-75: 0.75;
    --opacity-80: 0.8;
    --opacity-90: 0.9;
    --opacity-95: 0.95;
    --opacity-100: 1;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --color-primary: #9f7aea;
    --color-primary-light: #b794f4;
    --color-primary-dark: #805ad5;
    
    --color-background: #1a202c;
    --color-surface: #2d3748;
    --color-border: #4a5568;
    --color-text: #e2e8f0;
    --color-text-secondary: #a0aec0;
    
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
}

/* Custom Theme Support */
[data-theme="custom"] {
    /* These will be populated dynamically from user settings */
}

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

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(-25%);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
        transform: translateY(0);
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

/* Utility Classes */
.transition-all { transition: all var(--transition-base); }
.transition-colors { transition: background-color, border-color, color, fill, stroke var(--transition-base); }
.transition-opacity { transition: opacity var(--transition-base); }
.transition-shadow { transition: box-shadow var(--transition-base); }
.transition-transform { transition: transform var(--transition-base); }