body{font-family:Arial;margin:0;background:#f5f7fb;color:#1e293b;}
header{display:flex;justify-content:space-between;padding:20px;background:white;border-bottom:1px solid #ddd;}
nav a{margin:0 10px;color:#1e293b;text-decoration:none;}
.container{max-width:1100px;margin:auto;padding:40px;}
.card{background:white;padding:20px;border:1px solid #ddd;margin:10px;}