body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#f5f5f5;
}

.header{
    background:#111;
    color:white;
    padding:20px 40px;
    font-size:24px;
    font-weight:bold;
}

.container{
    padding:40px;
}

.card{
    background:white;
    padding:25px;
    border-radius:15px;
    box-shadow:0 5px 20px #ddd;
}

.btn{
    background:#ff7a00;
    color:white;
    padding:12px 25px;
    border-radius:8px;
    border:0;
}