.left-version{
    position: fixed;
    top: 0;
    z-index: 25;
    background: white;
    height: 100%;
    width: 20%;
    left: -20%;
    transition: 0.4s;
    overflow-y: auto;
    overflow-x: hidden;
}

.left-version.visible{
    left: 0;
}

.left-version-item{
    padding: 5px;
    text-align: center;
    border: 2px solid var(--node-color);
    margin: 10px 5px;
}

.left-version-item-button{
    background: limegreen;
    color: white;
    cursor: pointer;
}

.left-version-item-button:hover{
    background: rgb(70, 255, 70);
}