:root {
    /* ============================================
       COULEURS
       ============================================ */

    /* Primary - Violet */
    --color-primary-50: #f5f0ff;
    --color-primary-100: #ede5ff;
    --color-primary-200: #ddd0ff;
    --color-primary-300: #c4abff;
    --color-primary-400: #a67dff;
    --color-primary-500: #8b4dff;
    --color-primary-600: #701cf5;
    --color-primary-700: #5a16c4;
    --color-primary-800: #4a1399;
    --color-primary-900: #3d1078;

    /* Secondary - Rouge/Corail */
    --color-secondary-400: #ff6b6b;
    --color-secondary-500: #eb464b;
    --color-secondary-600: #d63a3f;

    /* Success */
    --color-success-50: #ecfdf5;
    --color-success-500: #10b981;
    --color-success-600: #059669;

    /* Warning */
    --color-warning-50: #fffbeb;
    --color-warning-500: #f59e0b;
    --color-warning-600: #d97706;

    /* Error */
    --color-error-50: #fef2f2;
    --color-error-500: #ef4444;
    --color-error-600: #dc2626;

    /* Neutral */
    --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;
    --color-gray-950: #030712;

    /* Semantic */
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-600);
    --color-text-muted: var(--color-gray-500);
    --color-text-inverse: #ffffff;

    --color-bg-primary: #ffffff;
    --color-bg-secondary: var(--color-gray-50);
    --color-bg-tertiary: var(--color-gray-100);
    --color-bg-dark: #0f1419;
    --color-bg-dark-elevated: #1a2028;

    --color-border: var(--color-gray-200);
    --color-border-light: var(--color-gray-100);

    /* ============================================
       TYPOGRAPHY
       ============================================ */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font sizes - fluid */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --font-size-sm: clamp(0.8125rem, 0.775rem + 0.2vw, 0.875rem);
    --font-size-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
    --font-size-lg: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --font-size-xl: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
    --font-size-2xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-3xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --font-size-4xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
    --font-size-5xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.25rem);
    --font-size-6xl: clamp(2.75rem, 2rem + 3.75vw, 4.5rem);

    /* Font weights */
    --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 heights */
    --line-height-none: 1;
    --line-height-tight: 1.2;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 1.75;

    /* Letter spacing */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;

    /* ============================================
       SPACING
       ============================================ */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: clamp(1rem, 4vw, 2rem);
    --section-padding: clamp(4rem, 8vw, 7rem);
    --header-height: 72px;

    /* ============================================
       BORDERS & RADIUS
       ============================================ */
    --radius-sm: 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 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

    /* Glow effects */
    --shadow-glow-primary: 0 0 20px rgb(112 28 245 / 0.2);
    --shadow-glow-primary-intense: 0 0 40px rgb(112 28 245 / 0.3);

    /* ============================================
       TRANSITIONS
       ============================================ */
    --transition-fastest: 100ms;
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    --transition-slower: 500ms;

    --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, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* ============================================
       Z-INDEX
       ============================================ */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
}