header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    color: #dbdbdb;
    background-color: #272826;
    padding-top: 0.5em;
    height: 1.75em;
    text-align: center;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1.5em;
    color: #dbdbdb;
    background-color: #272826;
    padding-top: 0.5em;
    height: 1.75em;
    text-align: center;
}

code { white-space: pre; }
a { color: inherit; }
body { background-color: #bbb; }
.inner {
    margin: 3em 1ch 3em 1ch;
    line-height: 1.5;
}