:root {
  /* Brand palette — derived from Tridentity logo gradient */
  --color-primary: #2dd4a8;
  --color-primary-rgb: 45, 212, 168;
  --color-primary-light: #5eead4;
  --color-primary-dark: #14b8a6;
  --color-accent-gold: #d4a847;
  --color-accent-gold-rgb: 212, 168, 71;
  --color-accent-peach: #e8a87c;
  --color-accent-peach-rgb: 232, 168, 124;

  /* Surfaces — dark corporate theme */
  --color-bg-dark: #050a15;
  --color-bg-section: #0a1025;
  --color-bg-card: rgba(15, 25, 50, 0.6);
  --color-bg-card-solid: #0f1932;
  --color-bg-card-hover: rgba(20, 35, 65, 0.7);
  --color-bg-elevated: #1e2a4a;
  --color-bg-light: #f8fafc;
  --color-bg-light-alt: #f1f5f9;
  --color-bg-glass: rgba(15, 25, 50, 0.4);

  /* Text */
  --color-text-white: #ffffff;
  --color-text-light: #e2e8f0;
  --color-text-muted: #8492a6;
  --color-text-dark: #0f172a;
  --color-text-dark-muted: #475569;

  /* Borders */
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-light: rgba(255, 255, 255, 0.1);
  --color-border-dark: #e2e8f0;
  --color-border-glow: rgba(45, 212, 168, 0.15);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2dd4a8, #14b8a6);
  --gradient-brand: linear-gradient(135deg, #5eead4, #2dd4a8, #d4a847);
  --gradient-hero: linear-gradient(160deg, #050a15 0%, #0a1025 30%, #0d1530 60%, #0a1025 100%);
  --gradient-card: linear-gradient(145deg, rgba(45, 212, 168, 0.04), rgba(212, 168, 71, 0.02));
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));

  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --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;
  --space-32: 8rem;

  /* Layout */
  --max-width: 1280px;
  --max-width-narrow: 960px;
  --max-width-wide: 1440px;
  --nav-height: 80px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(45, 212, 168, 0.12);
  --shadow-glow-sm: 0 0 30px rgba(45, 212, 168, 0.08);
  --shadow-glow-strong: 0 0 80px rgba(45, 212, 168, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}