body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#111;
    color:white;
}

header{
    padding:60px;
    text-align:center;
    background:#1d4ed8;
}

section{
    padding:40px;
}

.card{
    background:#222;
    padding:20px;
    border-radius:12px;
}

a{
    color:#4ea1ff;
    text-decoration:none;
}