.columnImage_border .columImgWrap {
  cursor: pointer;
}

.columnImage_border .columImgWrap::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 56px;
  height: 56px;
  margin: -28px 0 0 -28px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.55);
  z-index: 1;
  pointer-events: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.columnImage_border .columImgWrap::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  margin: -10px 0 0 -6px; /* optical centering: a triangle's visual
                              centre sits left of its bounding box */
  border-style: solid;
  border-width: 10px 0 10px 17px;
  border-color: transparent transparent transparent #fff;
  z-index: 2;
  pointer-events: none;
  transition: transform 0.2s ease;
}

.columnImage_border a:hover .columImgWrap::after {
  background-color: rgba(0, 119, 191, 0.85); /* site's existing brand blue, #0077bf */
  transform: scale(1.08);
}

.columnImage_border a:hover .columImgWrap::before {
  transform: scale(1.08);
}

@media screen and (max-width: 768px) {
  .columnImage_border .columImgWrap::after {
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
  }
  .columnImage_border .columImgWrap::before {
    border-width: 7px 0 7px 12px;
    margin: -7px 0 0 -4px;
  }
}