:root {
    /* Primary Blue */
    --nxt-blue-50: #EFF6FF;
    --nxt-blue-100: #DBEAFE;
    --nxt-blue-200: #BFDBFE;
    --nxt-blue-300: #93C5FD;
    --nxt-blue-400: #60A5FA;
    --nxt-blue-500: #3B82F6;
    --nxt-blue-600: #2563EB;
    --nxt-blue-700: #1D4ED8;
    --nxt-blue-800: #1E40AF;
    --nxt-blue-900: #1E3A8A;

    /* Accent Red */
    --nxt-red-50: #FEF2F2;
    --nxt-red-100: #FEE2E2;
    --nxt-red-200: #FECACA;
    --nxt-red-300: #FCA5A5;
    --nxt-red-400: #F87171;
    --nxt-red-500: #EF4444;
    --nxt-red-600: #DC2626;
    --nxt-red-700: #B91C1C;
    --nxt-red-800: #991B1B;
    --nxt-red-900: #7F1D1D;

    /* Neutrals */
    --nxt-dark: #0F172A;
    --nxt-dark-2: #1E293B;
    --nxt-dark-3: #334155;
    --nxt-gray-400: #94A3B8;
    --nxt-gray-500: #64748B;
    --nxt-gray-600: #475569;
    --nxt-light: #F8FAFC;
    --nxt-light-2: #F1F5F9;
    --nxt-light-3: #E2E8F0;
    --nxt-white: #FFFFFF;

    /* Semantic Colors */
    --nxt-primary: var(--nxt-blue-600);
    --nxt-primary-hover: var(--nxt-blue-700);
    --nxt-primary-light: var(--nxt-blue-50);
    --nxt-accent: var(--nxt-red-500);
    --nxt-accent-hover: var(--nxt-red-600);
    --nxt-success: #10B981;
    --nxt-warning: #F59E0B;
    --nxt-info: #06B6D4;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;

    /* Spacing */
    --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;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 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 -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.3);
    --shadow-glow-red: 0 0 20px rgba(239, 68, 68, 0.3);

    /* 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-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

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

    /* Breakpoints (use numeric values in @media - CSS vars not valid in media queries) */
    --bp-sm: 480px;
    --bp-md: 768px;
    --bp-lg: 1024px;
    --bp-xl: 1280px;
    --bp-nav: 1280px;

    /* Container */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1440px;
}