body { font-family: Arial; margin:0; padding:0; }
header { background:#2c3e50; color:white; padding:15px; text-align:center; }
nav a { color:white; margin:10px; text-decoration:none; }
section { padding:20px; }
footer { background:#2c3e50; color:white; text-align:center; padding:10px; }