:root {
  color-scheme: light;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #eef2f7;
  --color-text: #111827;
  --color-text-muted: #5b6472;
  --color-border: #d7dde7;
  --color-brand: #0f766e;
  --color-brand-strong: #115e59;
  --color-accent: #b45309;
  --focus-ring: 0 0 0 3px rgba(15, 118, 110, 0.24);
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-soft: 0 16px 40px rgba(15, 23, 42, 0.08);
  --font-family-base: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --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;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-background: #101418;
    --color-surface: #171d22;
    --color-surface-muted: #202830;
    --color-text: #f4f7fb;
    --color-text-muted: #a8b1bc;
    --color-border: #2d3742;
    --color-brand: #2dd4bf;
    --color-brand-strong: #5eead4;
    --color-accent: #f59e0b;
    --focus-ring: 0 0 0 3px rgba(45, 212, 191, 0.28);
    --shadow-soft: 0 16px 40px rgba(0, 0, 0, 0.3);
  }
}