:root {
  --color-bg: #ffffff;
  --color-bg-muted: #f5f7f6;
  --color-bg-accent: #e6f4ee;
  --color-surface: #ffffff;
  --color-border: #e1e6e3;

  --color-text: #0e1f1a;
  --color-text-muted: #3e524b;
  --color-text-subtle: #6a7a74;

  --color-brand: #006F51;
  --color-brand-hover: #00855f;
  --color-brand-deep: #004d38;
  --color-brand-ink: #003224;
  --color-brand-soft: #e6f4ee;
  --color-accent: #f4a300;

  --color-focus: #006F51;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(11, 31, 26, 0.06);
  --shadow-md: 0 6px 20px rgba(11, 31, 26, 0.10);
  --shadow-lg: 0 22px 50px rgba(11, 31, 26, 0.18);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --container: 1120px;
  --container-narrow: 720px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Overpass", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --fs-2xl: clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  --fs-3xl: clamp(2rem, 1.5rem + 2.2vw, 3rem);
  --fs-4xl: clamp(2.5rem, 1.8rem + 3vw, 3.75rem);

  --lh-tight: 1.15;
  --lh-snug: 1.35;
  --lh-normal: 1.55;
  --lh-relaxed: 1.7;

  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a1410;
    --color-bg-muted: #0f1c17;
    --color-bg-accent: #112822;
    --color-surface: #122019;
    --color-border: #1f2e28;

    --color-text: #ecf3ef;
    --color-text-muted: #c2cfca;
    --color-text-subtle: #93a39c;

    --color-brand: #2fae85;
    --color-brand-hover: #4dc69e;
    --color-brand-deep: #006F51;
    --color-brand-ink: #b9e7d4;
    --color-brand-soft: #112822;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.6);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 22px 50px rgba(0, 0, 0, 0.7);
  }
}