body {
    font-family: Arial, serif;
    text-align: center;
    box-sizing: border-box;

}

#buttonwrapper{
    font-size: 0;
    margin: auto;
    width: 900px;
    height: 1350px;
    border: 1px solid black;
}
.button{
    height: 300px;
    width: 300px;

}