.btn-wsp {
  position: fixed;
  width: 60px;
  height: 60px;
  line-height: 63px;
  bottom: 85px;
  left: 65px;
  background: transparent;
  color: transparent;
  border-radius: 50px;
  text-align: center;
  font-size: 35px;
  /*box-shadow: 0px 1px 10px rgba(0,0,0,0.3);*/
  z-index: 100;
  transition: all 300ms ease;
}

.btn-wsp:hover {
  background: transparent;
}

@media only screen and (min-width:320px) and (max-width:768px) {
  .btn-wsp {
    width: 63px;
    height: 63px;
    line-height: 66px;
  }
}