@-webkit-keyframes sheen {
  0% {
    -webkit-transform: skewY(-45deg) translateX(0);
            transform: skewY(-45deg) translateX(0);
  }
  100% {
    -webkit-transform: skewY(-45deg) translateX(12.5em);
            transform: skewY(-45deg) translateX(12.5em);
  }
}
@keyframes sheen {
  0% {
    -webkit-transform: skewY(-45deg) translateX(0);
            transform: skewY(-45deg) translateX(0);
  }
  100% {
    -webkit-transform: skewY(-45deg) translateX(12.5em);
            transform: skewY(-45deg) translateX(12.5em);
  }
}
.button_ {
  text-align: center;
  text-decoration: none;
  display: inline-block;
  -webkit-transition: all 0.2s ease-in-out;
  transition: all 0.2s ease-in-out;
  position: relative;
  overflow: hidden;
}
.button_:before {
  content: "";
  background-color: rgba(255, 255, 255, 0.5);
  height: 100%;
  width: 3em;
  display: block;
  position: absolute;
  top: 0;
  left: -4.5em;
  -webkit-transform: skewX(-50deg) translateX(0);
          transform: skewX(-50deg) translateX(0);
  -webkit-transition: none;
  transition: none;
}
.button_:hover {
  border-bottom: 4px solid #1977b5;
}
.button_:hover:before {
  -webkit-transform: skewX(-45deg) translateX(30em);
          transform: skewX(-45deg) translateX(30em);
  -webkit-transition: all 0.5s ease-in-out;
  transition: all 0.5s ease-in-out;
}