body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

nav {
    font-size: large;
    background: #8d8d8d;
    border-bottom: 3px solid black;
}

footer {
    line-height: 4px;
    background: #8d8d8d;
    border-top: 3px solid black;
}

pre {
    overflow-x: auto;
    overflow-y: auto;
    background: #303030;
    color: #ffffff;
    border-radius: 8px;
    padding: 5px;
}

.centered {
    align-self: center;
    text-align: center;
}

#content {
    margin-left: auto;
    margin-right: auto;
    padding-left: 12px;
    padding-right: 12px;
    border-left: 3px solid black;
    border-right: 3px solid black;
    background: #d4d4d4;
    width: min(100%, 800px);
}