:root {
  /* Palette — clean medical blue */
  --color-deepest: #0f1b2d;
  --color-primary: #1a6b8a;
  --color-primary-hover: #155a74;
  --color-primary-light: #e8f4f8;
  --color-surface: #ffffff;
  --color-background: #f5f7f9;
  --color-border: #dde3ea;
  --color-border-light: #eef1f5;

  /* Text */
  --color-text: #1a1d23;
  --color-text-dim: #4a5568;
  --color-text-faint: #718096;
  --color-text-ghost: #a0aec0;

  /* Semantic */
  --color-success: #276749;
  --color-success-bg: #f0fff4;
  --color-warning: #975a16;
  --color-warning-bg: #fffff0;
  --color-danger: #9b2c2c;
  --color-danger-bg: #fff5f5;
  --color-info: #2b6cb0;
  --color-info-bg: #ebf8ff;

  /* Concern levels */
  --color-elevated: #c53030;
  --color-elevated-bg: #fff5f5;
  --color-typical: #718096;
  --color-typical-bg: #f7fafc;
  --color-favorable: #276749;
  --color-favorable-bg: #f0fff4;

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Fira Code", monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.9375rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;

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

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);

  /* Layout */
  --content-max: 960px;
  --content-wide: 1200px;
}