body {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    margin: 0;

    background-color: #eee;

    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

#errors {
    position: fixed;
    display: block;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: #f99;
    border: 1px solid #922;
}

#errors p {
    padding: 1ex 1em;
    margin: 0;
}

#errors button {
    display: block;
    margin-left: auto;
    margin-right: 5px;
    margin-bottom: 5px;
}

#genome-history {
    margin: 0;
    overflow: scroll;
    align-self: stretch;
    flex-basis: 50%;
}

#instructions {
    padding: 1ex;
    margin: 0;
    overflow: scroll;
    flex-basis: 50%;

    background-color: #ddd;

    border-style: solid;
    border-top-width: 1px;
    border-left-width: 0;
    border-right-width: 0;
    border-bottom-width: 0;
}

#instructions .step {
    padding: 5px;
}

#instructions .step {
    display: none;
}

#instructions .current {
    background-color: yellow;
}

#instructions .step.current {
    display: list-item;
}

#print-results.step.current {
    display: block;
}

#die {
    display: block;
    float: right;
    padding: 2ex;

    background-color: #fde;
    border: 1px solid #aaa;
}

#die .value {
    text-align: center;
    padding-bottom: 1ex;
}

#nucleotide-selector {
    position: relative;
    white-space: nowrap;
    padding: 0;
    word-spacing: -6px; /* TODO: 0 doesn't work. And for some reason whitespace is being renderded between <li> elements? */
    width: 8em; /* TODO: this shouldn't be hard coded. */

    background-color: ivory;
    border: 1px solid black;
}

#nucleotide-selector,
.genome:not(.locked) {
    cursor: pointer;
}

#nucleotide-selector li:hover,
.genome:not(.locked) .nucleotide:hover {
    background-color: orange;
}

.genome .nucleotide.selected,
.genome:not(.locked) .nucleotide.selected:hover {
    background-color: red;
}

#nucleotide-selector li {
    display: inline-block;
    width: 2em;
    flex-basis: 2em;
    text-align: center;
    padding-top: 1ex;
    padding-bottom: 1ex;
}

.genome {
    margin: 0.5ex;
}

.genome.locked {
    cursor: text
}

.genome>ol {
    display: inline-flex;
    flex-wrap: wrap;
    padding: 0;
    border: 1px solid black;

    background-color: white;
}

.genome .nucleotide {
    display: inline-block;
    height: 32px;
    width: 32px;
    font-size: 18px;
    text-align: center;
    flex-wrap: wrap;
    justify-content: space-around;
    align-items: center;
}

.genome .nucleotide span {
    display: inline-block;
    padding-top: 5px;
    padding-bottom: 5px;
}