#btnLeft {
    width: 50px;
    height: 120px;
    display: inline-block;
    left: 0;
    top: 180px;
    text-decoration: none;
    color: #fff;
    font-size: 30px;
    text-align: center;
    line-height: 110px;
    background: #212124;
}
#btnRight {
    width: 50px;
    height: 120px;
    display: inline-block;
    right: 0;
    top: 180px;
    text-decoration: none;
    color: #fff;
    font-size: 30px;
    text-align: center;
    line-height: 110px;
    background: #212124;
}