body { font-family: Arial, sans-serif; margin:0; padding:0; color:#333; }
header { background: #0078C8; color: white; padding: 15px; text-align:center; }
nav { background:#005F96; text-align:center; padding:10px 0; }
nav a { color:white; margin:0 15px; text-decoration:none; font-weight:bold; }
nav a:hover { text-decoration:underline; }
section { padding: 20px; max-width: 900px; margin:auto; }
footer { background:#f4f4f4; color:#555; padding:20px; text-align:center; font-size:0.9em; }
.btn { display:inline-block; padding:10px 20px; background:#0078C8; color:white; border-radius:5px; text-decoration:none; }
.btn:hover { background:#005F96; }