:root {
  /* Palette */
  --color-primary: #1B2A4A;
  --color-primary-light: #243656;
  --color-primary-dark: #111D34;
  --color-accent: #F97220;
  --color-accent-hover: #E56510;
  --color-surface: #F5F7FA;
  --color-surface-alt: #EDF0F5;
  --color-white: #FFFFFF;
  --color-text: #2D3748;
  --color-text-light: #718096;
  --color-text-muted: #A0AEC0;
  --color-border: #E2E8F0;
  --color-success: #38A169;

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Roboto Mono', 'Consolas', monospace;

  --fs-hero: clamp(2.2rem, 5vw, 3.6rem);
  --fs-h1: clamp(1.8rem, 3.5vw, 2.8rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.2rem);
  --fs-h3: clamp(1.2rem, 2.5vw, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;

  --lh-heading: 1.25;
  --lh-body: 1.7;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 900px;
  --header-height: 72px;
  --border-radius: 6px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);

  /* Transitions */
  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;
}