body{

font-family:Arial,sans-serif;

background:#f4f4f4;

margin:0;

padding:40px;

}

.container{

max-width:900px;

margin:auto;

background:white;

padding:30px;

border-radius:12px;

box-shadow:0 0 15px rgba(0,0,0,.1);

}

h1{

margin-top:0;

}

nav{

margin:30px 0;

display:flex;

gap:15px;

flex-wrap:wrap;

}

nav a{

text-decoration:none;

padding:10px 20px;

background:#4a90e2;

color:white;

border-radius:8px;

}

nav a:hover{

background:#357abd;

}

.card{

margin-top:20px;

padding:20px;

background:#fafafa;

border-radius:10px;

border:1px solid #ddd;

}