body{
    font-family: Arial;
    margin: 0;
    background-color: #f4f4f4;
}

header{
    background-color: black;
    color: white;
    padding: 20px;
    text-align: center;
}

article{
    background-color: white;
    margin: 20px;
    padding: 20px;
    border-radius: 10px;
}