:root {
    /* Brand Colors */
    --color-primary: #0F172A;
    --color-primary-light: #1E293B;
    --color-secondary: #2563EB;
    --color-accent: #06B6D4;
    --color-highlight: #7C3AED;

    /* Semantic Colors */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #0EA5E9;

    /* Neutral Colors */
    --color-background: #FFFFFF;
    --color-surface: #F8FAFC;
    --color-border: #E5E7EB;
    --color-text: #111827;
    --color-text-muted: #6B7280;

    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    
    /* Font Sizes */
    --text-display: 64px;
    --text-h1: 56px;
    --text-h2: 42px;
    --text-h3: 32px;
    --text-h4: 24px;
    --text-h5: 20px;
    --text-body: 16px;
    --text-small: 14px;

    /* Spacing (8px scale) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 32px;
    --space-6: 48px;
    --space-7: 64px;
    --space-8: 80px;
    --space-9: 100px;
    --space-10: 120px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-1: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); /* Level 1: Subtle cards */
    --shadow-2: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); /* Level 2: Hover cards */
    --shadow-3: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04); /* Level 3: Modals/hero */

    /* Animation */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;

    /* Z-Index */
    --z-navbar: 1000;
    --z-dropdown: 1010;
    --z-modal: 1050;
    --z-tooltip: 1080;
    --z-floating-chat: 1100;
}