.locus_info {
    color: red;
    visibility: hidden;
}

.clickable {
    border-radius: 50%;
    background-color: rgba(17, 253, 0, 0.666);
}

.clickable:hover .locus_info {
    color: green;
    visibility: visible;
    background-color: rgba(0, 0, 0, 0.75);
    display: block;
}