:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}body{margin:0;padding:0;box-sizing:border-box}body{background-color:#fff;margin:0;font-family:Arial,sans-serif}header{background-color:#0bf;padding:20px;text-align:center}header nav{display:flex;justify-content:center;gap:20px}header nav a{color:#fff;text-decoration:none;font-weight:700}header nav a:hover{text-decoration:underline}footer{background-color:#0bf;color:#fff;text-align:center;padding:10px;position:relative;bottom:0;width:100%}@media (max-width: 600px){header nav{flex-direction:column}}