.sidebar {
    margin-top:100px;
    width: 1.5%;
    height:400px;
    border-radius:8px;
    text-align:center;
    background: rgba(205, 215, 230, 1);
    right: 10px;
    position: absolute;
    z-index: 1;
}

.buttonClass
{
    width: 90%;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.6s;
    margin-top: 10px;
}
.buttonClass:hover{
    transform: scale(1.2);
}