/* ==================== CSS VARIABLES ==================== */

:root {
    /* ==================== BRAND COLORS ==================== */
    --color-primary: #8B5CF6;
    --color-primary-light: #A78BFA;
    --color-primary-dark: #7C3AED;
    --color-secondary: #EC4899;
    --color-accent: #06B6D4;
    
    /* ==================== GRADIENTS ==================== */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-secondary: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
    --gradient-mesh: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    
    /* ==================== LIGHT MODE (DEFAULT) ==================== */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-card: #FFFFFF;
    --bg-overlay: rgba(255, 255, 255, 0.95);
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;
    
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* ==================== 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-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    
    /* ==================== SPACING ==================== */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* ==================== TYPOGRAPHY ==================== */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', 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;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --font-size-7xl: 4.5rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* ==================== LAYOUT ==================== */
    --container-max-width: 1280px;
    --container-padding: 1.5rem;
    --header-height: 80px;
    
    /* ==================== BORDER RADIUS ==================== */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* ==================== TRANSITIONS ==================== */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* ==================== Z-INDEX ==================== */
    --z-index-dropdown: 1000;
    --z-index-sticky: 1020;
    --z-index-fixed: 1030;
    --z-index-modal-backdrop: 1040;
    --z-index-modal: 1050;
    --z-index-popover: 1060;
    --z-index-tooltip: 1070;
}

/* ==================== DARK MODE ==================== */
@media (prefers-color-scheme: dark) {
    :root {
        /* ==================== DARK MODE BACKGROUNDS ==================== */
        --bg-primary: #0F0F1E;
        --bg-secondary: #1A1A2E;
        --bg-tertiary: #16213E;
        --bg-card: rgba(26, 26, 46, 0.8);
        --bg-overlay: rgba(15, 15, 30, 0.95);
        
        /* ==================== DARK MODE TEXT ==================== */
        --text-primary: #F9FAFB;
        --text-secondary: #D1D5DB;
        --text-tertiary: #9CA3AF;
        --text-inverse: #111827;
        
        /* ==================== DARK MODE BORDERS ==================== */
        --border-color: rgba(255, 255, 255, 0.1);
        --border-light: rgba(255, 255, 255, 0.05);
        --shadow-color: rgba(0, 0, 0, 0.5);
        
        /* ==================== DARK MODE SHADOWS ==================== */
        --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, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
        --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
        --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.4);
    }
}

/* ==================== MANUAL THEME OVERRIDE ==================== */
[data-theme="light"] {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --bg-card: #FFFFFF;
    --bg-overlay: rgba(255, 255, 255, 0.95);
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;
    
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    --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-glow: 0 0 40px rgba(139, 92, 246, 0.3);
}

[data-theme="dark"] {
    --bg-primary: #0F0F1E;
    --bg-secondary: #1A1A2E;
    --bg-tertiary: #16213E;
    --bg-card: rgba(26, 26, 46, 0.8);
    --bg-overlay: rgba(15, 15, 30, 0.95);
    
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --text-inverse: #111827;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    --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, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.4);
}

/* ==================== BREAKPOINTS ==================== */
/* We use these in @media queries */
/* 
  Mobile: < 640px
  Tablet: 640px - 1024px
  Desktop: > 1024px
  
  Usage:
  @media (min-width: 640px) { ... }
  @media (min-width: 768px) { ... }
  @media (min-width: 1024px) { ... }
  @media (min-width: 1280px) { ... }
*/