body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: rgb(126, 126, 126);
    margin: 0;
}

.sisalto {
    max-width: 900px;
    background-color: rgb(255, 255, 255);
    margin-left: auto;
    margin-right: auto;
    padding: 30px;
}