body {
    min-height: 100vh;
    position: relative;
}

footer {
    bottom: 1em;
    left: 0;
    margin: 0;
    position: absolute;
    right: 0;
}

.panel.no-nav-centered {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);
    margin: 0;
    min-width: 320px;
}

.no-nav-centered h1,
.no-nav-centered small {
    display: block;
    text-align: center;
}