:root{--red:#E30613;--dark:#111;--light:#f5f5f5;}
body{margin:0;font-family:Arial,sans-serif;background:var(--light)}
header,footer{background:var(--red);color:white;padding:20px}
main{max-width:1200px;margin:auto;padding:20px}
.card{background:white;padding:20px;border-radius:8px}