body { font-family: sans-serif; background-color: #111; color: #eee; margin: 0; }
header, nav, main { padding: 1em; }
nav a { margin: 0 1em; color: #4ef; }
textarea { width: 100%; height: 100px; background: #000; color: #0f0; border: 1px solid #0f0; }