.course[data-back]{background-size:100%;transition:all .25s ease-out;-webkit-transition:all .25s ease-out}.course[data-back]:hover{background-size:105%}.course[data-back] *{color:#fff !important;text-shadow:0 0 .5rem rgba(17,17,17,.5)}header{margin-bottom:0}#intro{min-height:24rem;background:#111;background-position:50% 50%;background-size:cover}#intro button:hover{background:#39f;color:#fff}#intro,#intro *{color:#fff}