.tooltip-west .tooltip-content-curve {
    left: calc(100% + 20px);
    -webkit-transform-origin: -2em 50%;
    transform-origin: -2em 50%;
    -webkit-transform: translate3d(0,50%,0) rotate3d(1,1,1,30deg);
    transform: translate3d(0,50%,0) rotate3d(1,1,1,30deg);
}
.tooltip-west .tooltip-content-curve::before,
.tooltip-west .tooltip-content-curve::after {
    right: 99%; /* because of FF, otherwise we have a gap */
}