.demobuts{
    height: 1.9rem;
    line-height: 1.9rem;
    font-size: 0.6rem;
    text-align: center;
    border: 1px solid #eee;
    width: 100%;
    background-color: transparent;
    display: block;
    margin-top: 0.25rem;
    cursor: pointer;
    color: #666;
}

.night .demobuts{
    background-color: #444;
    border: 1px solid #444;
    color: #aaa;
}