:root {
  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 2.75rem;

  --line-tight: 1.18;
  --line-normal: 1.5;
  --line-relaxed: 1.65;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 650;
  --weight-bold: 750;

  /* Colors */
  --color-page: #f6f7f4;
  --color-surface: #ffffff;
  --color-surface-soft: #eef3eb;
  --color-surface-muted: #e2e9de;
  --color-surface-raised: #ffffff;

  --color-text: #1f2a22;
  --color-text-muted: #5c695f;
  --color-text-subtle: #758078;

  --color-border: #d8dfd2;
  --color-border-strong: #b8c5b1;

  --color-brand: #2f6f45;
  --color-brand-hover: #245936;
  --color-brand-soft: #dcebdd;
  --color-brand-softer: #edf5ec;
  --color-brand-contrast: #ffffff;

  --color-accent: #8f5a3c;
  --color-accent-bg: #f2e7df;
  --color-accent-border: #d6b7a3;

  --color-good: #2f6f45;
  --color-good-bg: #e3f0e2;
  --color-good-border: #b9d4b7;

  --color-warning: #8b6818;
  --color-warning-bg: #f7ecc9;
  --color-warning-border: #ddc47b;

  --color-danger: #9b3a2f;
  --color-danger-bg: #f5dfdc;
  --color-danger-border: #dda9a2;

  --color-info: #3f6874;
  --color-info-bg: #e1edf0;
  --color-info-border: #b0cdd5;

  /* 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;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-pill: 999px;

  /* Layout */
  --container-narrow: 44rem;
  --container: 64rem;
  --container-wide: 75rem;
  --header-height: 4rem;
  --tap-target: 2.75rem;

  /* Breakpoints */
  --breakpoint-sm: 36rem;
  --breakpoint-md: 48rem;
  --breakpoint-lg: 64rem;
  --breakpoint-xl: 75rem;

  /* Effects */
  --shadow-soft: 0 1px 2px rgba(31, 42, 34, 0.06);
  --shadow-card: 0 8px 24px rgba(31, 42, 34, 0.08);
  --focus-ring: 0 0 0 3px rgba(47, 111, 69, 0.28);
  --duration-fast: 120ms;
  --duration-normal: 180ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
}