body {
    display:flex;
    flex-direction: column;
}

main {
    position: relative;
}

img, pre {
    background-color: white;
}

pre {
    padding:1rem;
}

.guidance {
    order: 99;
    background-color: #eeeeee;
    padding: 2em;
    margin-top: 1em;
}

.guidance h2 {
    width:100%;
}

.block {
    display: block;
}

.margin-bottom {
    margin-bottom: 2em;
}

.hint {
    min-width: 100px
}

.fade-in {
    animation: fade-in 60s;
    overflow: hidden;
}

@keyframes fade-in {
    0% {
        height: 0;
    }
    99% {
        height: auto;
    }
    100% {
        height: auto;
    }
}