html,
body {
    height: 100%;
}

.main-bg {
    background: url("https://placehold.co/1920x1080/343A40/E8E9EA") no-repeat
        center center;
    background-size: cover;
    position: relative;
}

.main-bg::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.cover-container {
    position: relative;
    z-index: 2;
    max-width: 42em;
}

main {
    margin-top: auto;
    margin-bottom: auto;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

.lead {
    font-size: 1.25rem;
    font-weight: 300;
}

footer a {
    color: #fff;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}