html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

main {
    min-height: 100vh;
    padding-top: 8px;
    padding-bottom: 2.5rem;
}

footer {
    clear: both;
    position: relative;
    height: 200px;
    margin-top: -200px;
}