lockserver/frontend/static/main.css

html, body {
    height: 100%;
    margin: 0;
    background-color: #1c1c1c;
    color: #fff;
    font-family: sans-serif;
}

a {
    color: #fff;
}

#wrapper {
    min-height: calc(100% - 2em);
    display: flex;
    flex-direction: column;
    row-gap: 1em;
    padding: 1em;
}

#main {
    flex-grow: 1;
}

header {
    font-size: 1.5em;
    font-weight: bold;
}

.code-enabled {
    background-color: #0a0;
}