:root {
  --primary-color: #2e7d32;
  --bg-color: #ffffff;
  --text-color: #333333;
  --font-family: system-ui, -apple-system, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
  }
}
body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
  padding: 1rem;
}
header, footer {
  padding: 1rem 0;
  border-bottom: 1px solid #ccc;
}
footer {
  border-top: 1px solid #ccc;
  border-bottom: none;
}
main {
  padding: 2rem 0;
  min-height: 60vh;
}
a { color: var(--primary-color); }
nav a { padding: 0 0.5rem; }
form { margin: 2rem 0; }
input, button { padding: 0.8rem; font-size: 1rem; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }