.tiles-a a{
  pointer-events: none; 
  cursor: default;
}

.tiles-a {
  width: 100%;
  position: relative;
  overflow: hidden;
}
.tiles-a ul {
  margin: 0;
  padding: 0;
}
.tiles-a li {
  list-style: none;
}
@media (min-width: 640px) {
  .tiles-a li {
    float: left;
    width: 33.33%;
  }
}
.tiles-a a {
  margin: 1em;
  display: block;
  background: #222;
  padding-top: 73%;
  height: 0;
}

.visually-hidden {
  position: absolute;
  overflow: hidden;
  clip: rect(0 0 0 0);
  height: 1px;
  width: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
}