.circleTail {
    height: 12px;
    width: 12px;
    border-radius: 12px;
    background-color: black;
    position: absolute;
    top: 0;
    left: 0;
    transform: translate(-100%, -100%);
}

/* Target screens up to 767px width for common mobile devices */
@media (max-width: 767px) { 
    .circleTail {
        display: none;
    }
}