body{
    background-color: rgb(201, 224, 183);
    width: 1200px;
    margin-top: 10px;
    margin-left: 20px;
    margin-right: 20px;
}

#center {
    margin: 100px;
    text-align: center;
}

#next_button {
    position: absolute;
    right: 70px;
    bottom: 10px;
}