.mu-back-up {
    position: fixed;
    z-index: 100;
    cursor: pointer;
    display: block;
    border-radius: 4px;

    &-default {
        background-color: rgba(126, 87, 194, .6);
        border-radius: 2px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
        transition: all .2s ease-in-out;
        display: block;
    }

    i {
        color: #fff;
        font-size: 24px;
        padding: 8px 12px;
    }
}