:root {
  /* Palette */
  --color-charcoal: #1a1d21;
  --color-charcoal-light: #2a2f36;
  --color-white: #fafafa;
  --color-off-white: #f4f5f6;
  --color-slate: #64748b;
  --color-slate-light: #94a3b8;
  --color-slate-dark: #475569;
  --color-accent: #3d5a80;
  --color-accent-hover: #2c4463;
  --color-accent-muted: #e8edf3;
  --color-border: #e2e8f0;
  --color-success: #166534;
  --color-success-bg: #dcfce7;
  --color-error: #991b1b;
  --color-error-bg: #fee2e2;

  /* Typography */
  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.6;

  /* 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;

  /* Layout */
  --container-max: 1280px;
  --container-narrow: 720px;
  --header-height: 72px;

  /* Radius & shadow */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(26, 29, 33, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 29, 33, 0.1);
  --shadow-lg: 0 8px 24px rgba(26, 29, 33, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Breakpoints (for reference in JS) */
  --bp-tablet: 768px;
  --bp-desktop: 1024px;
  --bp-wide: 1280px;
}