html, body {
    padding: 0;
    margin: 0;
    height: 100%;
    display: grid;
    background: #0e2a47;
}
.light {
    height: 25vh;
    max-height: 185px;
    background-size: auto;
    position: absolute;
    width: 100%;
}
header.light {
    top: 0;
    transform: rotate(180deg);
}
footer.light {
    bottom: 0;
}
.light[data-light="on"] {
    background: url(img/light-on.svg);
}
.light[data-light="backup"] {
    background: url(img/backup-light-on.svg);
}
section {
    margin: auto;
}
.line {
    padding: 20px 100px;
    margin: 10px;
    background: #f7f7f7;
}
footer.line {
    background: #fff;
    color: #777
}
.status {
    color: #aaa;
}
.status-on {
    color: #0c0;
}
.status-off {
    color: #f00;
}