:root {
  color-scheme: light dark;

  /* Light theme (default) */
  --color-bg: #ffffff;
  --color-bg-secondary: #f5f5f5;
  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-primary: #1e3a5f;
  --color-primary-hover: #2d4a7c;
}

[data-theme="dark"] {
  --color-bg: #1a1a1a;
  --color-bg-secondary: #2d2d2d;
  --color-text: #f3f4f6;
  --color-text-secondary: #9ca3af;
  --color-border: #404040;
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color 0.2s, color 0.2s;
}

code {
  font-size: 1em;
}