style.css

.centerbox{
    -webkit-order: 2;
    order: 2;
}

.jspsych-instructions-nav {
    -webkit-order: 3;
    order: 3;
}

.sample_img {
    margin: auto;
    text-align: center
}

.display_stage{
	display: -webkit-flex;
	display: flex;
	-webkit-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center; -moz-box-align: center; /* OLD… */
    -ms-flex-align: center; 
    -webkit-align-items: center;
    align-items: center;
}


.center-content{
	-webkit-order: 2;
    order: 2;
}

#bottom_img{
    height:132px;
    width: 351px
}

img {
    align: middle;
}

#jspsych-poldrack-survey-multi-choice-form {
    -webkit-order: 1;
    order: 1;
    margin: 3vh 3vw auto 3vw;
}

.jspsych-survey-multi-choice-nav{
    -webkit-order: 3;
    order: 3;
}

.jspsych-poldrack-survey-multi-choice-opts {
    font-size: 20px;
}