:root {
  /* Color Palette: Sustainable Deep Tech */
  --bg-primary: #06110d;
  --bg-secondary: #0a1b14;
  --bg-surface: #0f271e;
  --bg-surface-elevated: #143529;
  --bg-surface-glass: rgba(15, 39, 30, 0.75);
  --bg-surface-glass-border: rgba(52, 211, 153, 0.18);
  
  /* Text & Foreground */
  --text-primary: #f1f7f4;
  --text-secondary: #a3c4b5;
  --text-muted: #6b8f7e;
  --text-inverse: #06110d;

  /* Brand Accents */
  --accent-emerald: #10b981;
  --accent-mint: #34d399;
  --accent-mint-glow: rgba(52, 211, 153, 0.25);
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.22);
  --accent-gold: #f59e0b;
  --accent-gold-glow: rgba(245, 158, 11, 0.2);
  --accent-danger: #ef4444;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  --gradient-brand-subtle: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.08) 100%);
  --gradient-card: linear-gradient(180deg, rgba(20, 53, 41, 0.8) 0%, rgba(11, 27, 20, 0.95) 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(52, 211, 153, 0.15) 0%, transparent 70%);

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

  /* Spacing */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 6rem;

  /* Borders & Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  --border-subtle: 1px solid rgba(255, 255, 255, 0.08);
  --border-brand: 1px solid rgba(52, 211, 153, 0.25);
  --border-brand-hover: 1px solid rgba(52, 211, 153, 0.6);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(52, 211, 153, 0.25);

  /* Layout */
  --container-max-width: 1280px;
  --container-padding: 1.5rem;
  --nav-height: 4.5rem;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}