body {font-family: Arial, sans-serif; margin:0; padding:0; background:#f5f7fa;}
header {background:#0a6cff; color:#fff; padding:20px; text-align:center;}
section {padding:20px; background:#fff; margin:10px; border-radius:8px;}
footer {text-align:center; padding:15px; background:#222; color:#fff;}