.round-button-circle {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 100%;
  border-radius: 50%;
  overflow: hidden;
}

a.round-button {
  display: block;
  position: relative;
  float: left;
  width: 100%;
  padding-top: 50%;
  padding-bottom: 50%;
  line-height: 1em;
  margin-top: -0.5em;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.215, 0.610, 0.355, 1);
}
.round-button span {
  position:relative;
  z-index:2;
}
.round-button:before{
  position: absolute;
  content: " ";
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  background-color: rgba(1, 26, 64, 0.2);
}
.round-button:hover:before{
  background-color: rgba(255,255,255, 0.7);
}
.round-button:hover {
  color:rgba(1, 26, 64) !important;
}