body{

font-family:Arial;

max-width:900px;

margin:auto;

padding:40px;

background:#111;

color:white;

}

header{

text-align:center;

margin-bottom:50px;

}

.card{

padding:20px;

background:#222;

border-radius:10px;

margin-top:20px;

}

a{

color:#4da3ff;

text-decoration:none;

}