body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;max-width:46rem;margin:0 auto;padding:1rem;line-height:1.6;color:#1b1b1b}
header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #ddd;padding-bottom:.5rem}
.marca{font-weight:700;text-decoration:none;color:inherit}nav a{margin-left:1rem}
section{border-top:1px solid #eee;padding:.5rem 0}footer{border-top:1px solid #ddd;margin-top:2rem;color:#666}