.cover-container {
    max-width: 30em;
}

.cover {
    padding: 0 1.5rem;
}

.mb-auto, .my-auto {
    margin-bottom: auto !important;
}

.mt-auto, .my-auto {
    margin-top: auto !important;
}
.mastfoot {
    color: rgba(255, 255, 255, .5);
}

html, body {
    height: 100%;
}