<button class="button button--ujarak">Vote</button>

.button { float: left; min-width: 150px; max-width: 250px; display: block; margin: 1em; padding: 1em 2em; border: none; background: none; color: inherit; vertical-align: middle; position: relative; z-index: 1; }

.button:focus { outline: none; }

.button > span { vertical-align: middle; }
.button--ujarak {
  -webkit-transition: border-color 0.4s, color 0.4s;
  transition: border-color 0.4s, color 0.4s;
}
.button--ujarak::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #37474f;
  z-index: -1;
  opacity: 0;
  -webkit-transform: scale3d(0.7, 1, 1);
  transform: scale3d(0.7, 1, 1);
  -webkit-transition: -webkit-transform 0.4s, opacity 0.4s;
  transition: transform 0.4s, opacity 0.4s;
  -webkit-transition-timing-function: cubic-bezier(0.2, 1, 0.3, 1);
  transition-timing-function: cubic-bezier(0.2, 1, 0.3, 1);
}
.button--ujarak.button--round-s::before {
  border-radius: 2px;
}
.button--ujarak.button--inverted::before {
  background: #7986CB;
}
.button--ujarak,
.button--ujarak::before {
  -webkit-transition-timing-function: cubic-bezier(0.2, 1, 0.3, 1);
  transition-timing-function: cubic-bezier(0.2, 1, 0.3, 1);
}
.button--ujarak:hover {
  color: #fff;
  border-color: #37474f;
}
.button--ujarak.button--inverted:hover {
  color: #37474F;
  border-color: #fff;
}
.button--ujarak:hover::before {
  opacity: 1;
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
}