body {
    text-align: center;
}
button {
    width: 240px;
    height: 80px;
    margin-bottom: 10px;
    margin-top: 10px;
}
.modeselector {
    margin: 0;
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.text {
    font-size: 100px; 
    padding-top: 30px;
    margin: 0;
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translate(-50%, -50%);
}