:root {
  /* === DUAL-LAYER COLOR SCHEME === */

  /* Dark base layer */
  --color-deep-navy: #0A0E1A;
  --color-dark-slate: #111827;
  --color-charcoal: #1A1F2E;
  --color-midnight-blue: #0D1B2A;
  --color-steel-gray: #2A3040;

  /* Light overlay layer */
  --color-frost-white: #F8FAFF;
  --color-pearl: #EEF1F8;
  --color-ice-blue: #E0EAFF;
  --color-soft-silver: #C8D0E0;

  /* Accent - water-inspired futuristic */
  --color-aqua-glow: #00D4FF;
  --color-electric-cyan: #00E5FF;
  --color-neon-teal: #00FFD1;
  --color-deep-cerulean: #0077B6;
  --color-ocean-gradient: linear-gradient(135deg, #00D4FF 0%, #0077B6 50%, #00FFD1 100%);

  /* Social impact accent */
  --color-warm-amber: #FFB347;
  --color-hope-gold: #FFD700;

  /* Text */
  --text-primary-light: #F8FAFF;
  --text-secondary-light: #A0AEC0;
  --text-primary-dark: #0A0E1A;
  --text-secondary-dark: #4A5568;
  --text-accent: #00D4FF;

  /* === SPACING (8px base) === */
  --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;

  /* === TYPOGRAPHY === */
  --font-display: 'Space Grotesk', sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --fs-hero: clamp(2.5rem, 6vw, 5rem);
  --fs-h1: clamp(2rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.5rem);
  --fs-h3: clamp(1.125rem, 2vw, 1.5rem);
  --fs-body: clamp(0.9375rem, 1.2vw, 1.125rem);
  --fs-small: 0.875rem;
  --fs-caption: 0.75rem;

  --lh-tight: 1.1;
  --lh-snug: 1.3;
  --lh-normal: 1.6;
  --lh-relaxed: 1.8;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  /* === BORDERS === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* === SHADOWS === */
  --shadow-card: 0 4px 24px rgba(0, 212, 255, 0.06);
  --shadow-card-hover: 0 8px 40px rgba(0, 212, 255, 0.12);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
  --shadow-deep: 0 20px 60px rgba(0, 0, 0, 0.4);

  /* === TRANSITIONS === */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 600ms;
  --duration-slower: 900ms;

  /* === LAYOUT === */
  --max-width: 1280px;
  --nav-height: 72px;

  /* === GLASS MORPHISM === */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 20px;
}