:root {
  /* Colors */
  --bg: #020617;
  --surface: #0F172A;
  --card: #111827;
  --primary: #2563EB;
  --primary-light: #3B82F6;
  --primary-dark: #1D4ED8;
  --accent: #38BDF8;
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --text: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563EB, #38BDF8);
  --gradient-accent: linear-gradient(135deg, #38BDF8, #10B981);
  --gradient-warm: linear-gradient(135deg, #F59E0B, #EF4444);
  --gradient-text: linear-gradient(135deg, #2563EB 0%, #38BDF8 50%, #10B981 100%);
  --gradient-card: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(56, 189, 248, 0.05));
  --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(37, 99, 235, 0.15), transparent 40%);

  /* Glass */
  --glass-bg: rgba(15, 23, 42, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(20px);

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-button: 'Manrope', sans-serif;

  /* Font sizes - fluid */
  --fs-hero: clamp(2.5rem, 6vw, 5rem);
  --fs-h1: clamp(2rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.75rem, 3vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 2vw, 1.75rem);
  --fs-h4: clamp(1.1rem, 1.5vw, 1.35rem);
  --fs-body: clamp(0.95rem, 1vw, 1.05rem);
  --fs-small: clamp(0.8rem, 0.9vw, 0.9rem);
  --fs-xs: 0.75rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-section: clamp(4rem, 8vw, 8rem);

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
  --container-narrow: 800px;
  --nav-height: 72px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.3);
  --shadow-glow-accent: 0 0 30px rgba(56, 189, 248, 0.3);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 600ms;

  /* Z-index */
  --z-behind: -1;
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-nav: 500;
  --z-modal: 1000;
  --z-loader: 2000;
  --z-cursor: 3000;
}