.content-bg {
    background-image: url("../lib/img/bg/404-1080.jpg");
    opacity: 0.25;
    background-position: center bottom;
}
@media all and (min-height: 1440px) { .content-bg { background-image: url("../lib/img/bg/404-1440.jpg"); } }
@media all and (min-height: 2160px) { .content-bg { background-image: url("../lib/img/bg/404-2160.jpg"); } }

.content a {
    display: block;
    margin: 20px 0 0;
}

.content a:first-of-type {
    margin: 50px 0 0;
}

.content a h2 {
    font-size: 16pt;
    font-weight: 300;
    text-decoration: none;
    color: black;
}

.content a h2:after {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 3px;
    background-color: var(--color-red);
    opacity: 0;
    transition: opacity 500ms;
}

.content a h2:hover:after {
    opacity: 1;
}