html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
    width: 100%;
}

body {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
    width: 100%;
}

.anim_circles {
    width: 50vh;
    height: 50vh;
    border-radius: 50%;
    border: 1px solid black;
    position: relative;
    display: none;
    margin: auto;
}

.anim_circles .text{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 20vh;
}

#choices_menu img {
    height: 20vh;
    cursor: pointer;
}
#choice1 img{
    height: 20vh;
}

#choice2 img{
    height: 20vh;
}