:root {
  --text-color: #333;
  --bg-color: #fff;
  --accent-color: #2c5e53;
  --font-main: system-ui, -apple-system, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --text-color: #e0e0e0; --bg-color: #121212; --accent-color: #80cbc4; }
}
body { font-family: var(--font-main); color: var(--text-color); background-color: var(--bg-color); line-height: 1.6; max-width: 800px; margin: 0 auto; padding: 20px; }
header { margin-bottom: 2rem; }
h1, h2 { color: var(--accent-color); }
nav a { color: var(--accent-color); padding: 10px; display: inline-block; }
footer { margin-top: 3rem; border-top: 1px solid #ccc; padding-top: 1rem; font-size: 0.9rem; }
form { margin: 20px 0; padding: 20px; border: 1px solid #ccc; }
input { padding: 10px; width: 100%; max-width: 300px; display: block; margin-bottom: 10px; }
button { padding: 10px 20px; background: var(--accent-color); color: #fff; border: none; cursor: pointer; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }