/*
 * PromptifyArt - Global CSS Variables System (Unified)
 * This file controls the design system for the entire website.
 * Path: assets/css/global/variables.css
 */

:root {
    /* =========================================
       1. Color System
       ========================================= */
    
    /* Primary Colors */
    --color-primary: #6366f1;
    --color-primary-rgb: 99, 102, 241;
    --color-primary-dark: #4f46e5;
    --color-primary-darker: #3730a3;
    --color-primary-light: #e0e7ff;

    /* Secondary Colors */
    --color-secondary: #8b5cf6;
    --color-secondary-rgb: 139, 92, 246;
    --color-secondary-dark: #7c3aed;
    --color-secondary-light: #ede9fe;

    /* Accent Colors */
    --color-accent: #f59e0b;
    --color-accent-rgb: 245, 158, 11;
    --color-accent-dark: #d97706;
    --color-accent-light: #fef3c7;

    /* State Colors */
    --color-success: #10b981;
    --color-success-rgb: 16, 185, 129;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;
    --color-success-border: #6ee7b7;
    
    --color-warning: #f59e0b;
    --color-warning-rgb: 245, 158, 11;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #92400e;
    --color-warning-border: #fcd34d;
    
    --color-error: #ef4444;
    --color-error-rgb: 239, 68, 68;
    --color-error-light: #fee2e2;
    --color-error-dark: #991b1b;
    --color-error-border: #fca5a5;
    
    --color-info: #3b82f6;
    --color-info-rgb: 59, 130, 246;
    --color-info-light: #dbeafe;
    --color-info-dark: #1e40af;
    --color-info-border: #93c5fd;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-white-rgb: 255, 255, 255;
    --color-black: #000000;
    --color-black-rgb: 0, 0, 0;
    
    --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: #0f172a;

    /* Semantic Colors */
    --color-bg: #ffffff;
    --color-bg-rgb: 255, 255, 255;
    --color-bg-alt: #f8fafc; /* gray-50 */
    --color-bg-light: #f8fafc;
    
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9; /* gray-100 */
    
    --color-text: #1e293b; /* gray-800 */
    --color-text-dark: #1e293b;
    --color-text-secondary: #64748b; /* gray-500 */
    --color-text-light: #64748b;
    --color-text-tertiary: #94a3b8; /* gray-400 */
    --color-text-inverse: #ffffff;
    --color-text-on-primary: #ffffff;

    --color-border: #e2e8f0; /* gray-200 */
    --color-border-rgb: 226, 232, 240;
    --color-border-light: #f1f5f9;
    --color-border-dark: #cbd5e1;
    
    /* Overlay Colors */
    --color-overlay: rgba(0, 0, 0, 0.5);

    /* =========================================
       2. Gradient System
       ========================================= */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-primary-soft: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.1) 0%, rgba(var(--color-secondary-rgb), 0.1) 100%);
    --gradient-primary-hover: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary-dark) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, #f97316 100%);
    --gradient-login: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-gold: linear-gradient(45deg, #f6d365, #fda085);
    --gradient-gray-soft: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    --gradient-success: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, var(--color-error) 0%, #dc2626 100%);
    --gradient-soft: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);

    /* =========================================
       3. Typography System
       ========================================= */
    --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Segoe UI Emoji', sans-serif;
    --font-family-base: var(--font-family-sans);
    --font-family-heading: var(--font-family-sans);
    --font-family-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-2xl-plus: 1.75rem; /* 28px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-metric: 2.5rem; /* 40px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-size-hero: 3.5rem;   /* 56px */
    --font-size-6xl: 3.75rem;   /* 60px */
    --font-size-7xl: 4.5rem;    /* 72px */
    --font-size-8xl: 6rem;      /* 96px */
    --font-size-9xl: 8rem;      /* 128px */

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* =========================================
       4. Spacing System
       ========================================= */
    --spacing-unit: 0.25rem;
    --spacing-1: 0.25rem;   /* 4px */
    --spacing-2: 0.5rem;    /* 8px */
    --spacing-3: 0.75rem;   /* 12px */
    --spacing-4: 1rem;      /* 16px */
    --spacing-5: 1.25rem;   /* 20px */
    --spacing-6: 1.5rem;    /* 24px */
    --spacing-8: 2rem;      /* 32px */
    --spacing-10: 2.5rem;   /* 40px */
    --spacing-12: 3rem;     /* 48px */
    --spacing-16: 4rem;     /* 64px */
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Spacing Aliases */
    --spacing-xs: var(--spacing-1);
    --spacing-sm: var(--spacing-2);
    --spacing-md: var(--spacing-4);
    --spacing-lg: var(--spacing-6);
    --spacing-xl: var(--spacing-8);
    --spacing-2xl: var(--spacing-10);
    --spacing-3xl: var(--spacing-12);
    --spacing-4xl: var(--spacing-16);

    /* =========================================
       5. Border Radius
       ========================================= */
    --radius-sm: 0.25rem;     /* 4px */
    --radius-md: 0.5rem;      /* 8px */
    --radius-lg: 0.75rem;     /* 12px */
    --radius-xl: 1rem;        /* 16px */
    --radius-2xl: 1.5rem;     /* 24px */
    --radius-full: 9999px;
    --radius-base: var(--radius-sm);

    /* =========================================
       6. 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), 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);
    --shadow-auth: 0 20px 40px rgba(0, 0, 0, 0.15);
    --shadow-card-float: 0 10px 30px rgba(0, 0, 0, 0.2);
    
    --shadow-primary: 0 4px 12px rgba(var(--color-primary-rgb), 0.25);
    --shadow-primary-hover: 0 8px 16px rgba(var(--color-primary-rgb), 0.3);
    --shadow-primary-30: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);

    /* =========================================
       7. Layout & Z-Index
       ========================================= */
    --container-max-width: 1440px;
    --container-content: 1200px;
    --container-md: 1000px;
    --container-sm: 800px;
    --container-xs: 600px;
    --container-narrow: 768px;
    --container-padding: var(--spacing-6);
    --header-height: 64px;
    --sidebar-width: 280px;
    --sidebar-width-wide: 350px;

    --z-negative: -1;
    --z-elevate: 1;
    --z-header: 100;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;

    /* =========================================
       8. Transitions & Animation
       ========================================= */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: var(--transition-normal);
    
    --animation-duration-fast: 150ms;
    --animation-duration-normal: 300ms;
    --animation-duration-slow: 500ms;

    /* =========================================
       9. Components & Enhanced
       ========================================= */
    --backdrop-blur: 10px;
    
    /* Glass Effect */
    --glass-bg-light: rgba(255, 255, 255, 0.9);
    --glass-bg-dark: rgba(30, 41, 59, 0.9);
    --glass-border-light: rgba(255, 255, 255, 0.2);
    --glass-border-dark: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    --glass-blur: blur(20px);
    
    /* Cards */
    --card-bg-glass: rgba(255, 255, 255, 0.9);
    --card-border-glass: rgba(255, 255, 255, 0.2);
    --card-shadow-default: var(--shadow-lg);
    --card-shadow-hover: var(--shadow-2xl);
    --card-radius-large: var(--radius-xl);
    
    /* Buttons */
    --btn-height-large: 56px;
    --btn-height-medium: 48px;
    --btn-height-small: 40px;
    --btn-radius-large: var(--radius-xl);
    --btn-radius-medium: var(--radius-lg);
    --btn-radius-small: var(--radius-md);

    /* Modal */
    --modal-bg: rgba(255, 255, 255, 0.95);
    --modal-border: rgba(255, 255, 255, 0.2);
    --modal-radius: var(--radius-2xl);
    --modal-padding: var(--spacing-xl);
    --modal-shadow: var(--shadow-2xl);
    --modal-backdrop: rgba(0, 0, 0, 0.7);

    /* =========================================
       10. Compatibility Mappings (Aliases)
       ========================================= */
    /* Mappings for unified.css and legacy code */
    --primary-color: var(--color-primary);
    --secondary-color: var(--color-secondary);
    --accent-color: var(--color-accent);
    
    --text-primary: var(--color-text);
    --text-secondary: var(--color-text-secondary);
    
    --bg-primary: var(--color-bg);
    --bg-secondary: var(--color-bg-alt);
    
    --border-color: var(--color-border);
    
    --color-background: var(--color-bg);
    
    --border-primary-soft: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

/* =========================================
   Dark Mode Overrides
   ========================================= */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f172a;
        --color-bg-rgb: 15, 23, 42;
        --color-bg-alt: #1e293b;
        
        --color-surface: #1e293b;
        --color-surface-alt: #334155;
        
        --color-text: #f1f5f9;
        --color-text-dark: #f1f5f9;
        --color-text-secondary: #cbd5e1;
        --color-text-tertiary: #94a3b8;
        
        --color-border: #334155;
        --color-border-light: #475569;
        --color-border-dark: #64748b;
        
        --glass-bg-light: rgba(30, 41, 59, 0.9);
        --glass-border-light: rgba(255, 255, 255, 0.1);
        
        --card-bg-glass: rgba(30, 41, 59, 0.9);
        --card-border-glass: rgba(255, 255, 255, 0.1);
        
        --modal-bg: rgba(30, 41, 59, 0.95);
        --modal-border: rgba(255, 255, 255, 0.1);
        
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    }
}