.panels section {
    background: #d6e8e5;
    min-height: 100%;
}

.panels section:nth-child(2) {
    min-height: calc(100% + 200px);
}

.panels section:nth-child(2n) {
    background: #c2d6d2;
}

.panels.horizontal {
    display: flex;
}

.panels.horizontal section {
    min-height: 0;
    min-width: 100%;
}

.panels.horizontal section:nth-child(2) {
    min-width: calc(100% + 200px);
}

section .explanation,
section pre {
    background: #edf7f5;
}

section:nth-child(2n) .explanation,
section:nth-child(2n) pre {
    background: #ffffff;
}

section.introduction {
    align-items: center;
    justify-content: center;
}

section.introduction .center {
    text-align: center;
}

section.introduction .center p {
    margin-left: auto;
    margin-right: auto;
    max-width: 900px;
}

section.introduction .center p a {
    word-break: break-all;
}

section.introduction .bottom {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding-bottom: 50px;

    text-align: center;
    font-size: 60%;
}

section.introduction .bottom:after {
    display: block;
    margin: 1em auto 0;
    height: 20px;
    width: 20px;

    border-right: 1px solid;
    border-bottom: 1px solid;
    content: '';

    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

section.options,
section.options_explained {
    min-height: 100vh;
    height: auto;
}

@media screen and (max-width: 768px) {
    h1 {
        font-size: 200%;
    }
}

h2 {
    font-weight: inherit;
}

a {
    color: inherit;
    text-decoration: underline;
}

.group {
    flex-grow: 1;
    display: flex;
    flex-wrap: wrap;
    margin: -25px;
}

.group > * {
    margin: 25px;
}

.panels,
pre {
    flex-grow: 99999;
    flex-basis: 300px;
}

.panels {
    overflow: auto;
}

.explanation,
pre {
    margin: 0;
    overflow-x: auto;
    padding: 50px;
}

@media screen and (max-width: 768px) {
    .explanation,
    pre {
        padding: 25px;
    }
}

.explanation dt,
pre {
    font-size: 80%;
    font-family: Ubunutu Mono, monospace;
}

.explanation {
    flex-grow: 1;
}

.explanation dt:after {
    content: ':';
}

.explanation dd {
    margin: 0 0 0 10px;
}

.explanation dd + dt {
    margin: 25px 0 0;
}

.aside {
    flex-grow: 1;
    flex-basis: 300px;
}

.aside > *:first-child {
    margin-top: 0;
}

.aside > *:last-child {
    margin-bottom: 0;
}