.gsf-video {
  text-align: center;
}
.gsf-video a {
  display: inline-block;
  cursor: pointer;
  -webkit-transition: 0.5s;
  -moz-transition: 0.5s;
  -ms-transition: 0.5s;
  -o-transition: 0.5s;
  transition: 0.5s;
  width: 90px;
  height: 90px;
  position: relative;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
}
.gsf-video a i {
  font-size: 20px;
  line-height: 90px;
  padding-left: 4px;
}
.gsf-video a:before {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
  -o-transition: all 0.5s;
  transition: all 0.5s;
  -webkit-transform: scale(1);
  -moz-transform: scale(1);
  -ms-transform: scale(1);
  -o-transform: scale(1);
  transform: scale(1);
  opacity: 1;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
}
.gsf-video a:hover:before,
.gsf-video a:focus:before,
.gsf-video a:active:before {
  -webkit-transform: scale(1.3);
  -moz-transform: scale(1.3);
  -ms-transform: scale(1.3);
  -o-transform: scale(1.3);
  transform: scale(1.3);
  opacity: 0;
}
.gsf-video.gsf-video-large a:before {
  border: 5px solid;
}
.gsf-video.gsf-video-medium a {
  width: 80px;
  height: 80px;
}
.gsf-video.gsf-video-medium a i {
  line-height: 80px;
  font-size: 18px;
}
.gsf-video.gsf-video-medium a:before {
  border: 3px solid;
}
.gsf-video.gsf-video-small a {
  width: 70px;
  height: 70px;
}
.gsf-video.gsf-video-small a i {
  line-height: 70px;
  font-size: 16px;
}
.gsf-video.gsf-video-small a:before {
  border: 3px solid;
}