.popover.bottom > .arrow:after {
    border-bottom-color: transparent;
}

.popover.top > .arrow:after {
    border-top-color: transparent;
}

.popover.left > .arrow:after {
    border-left-color: transparent;
}

.popover.right > .arrow:after {
    border-right-color: transparent;
}

.popover {
     max-width: 340px;
     background-color: rgba(20,20,20,0.4);
     border-radius: 30px;
}