.button {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: 10rem;
  color: #fff;
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: 0.15rem;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.button:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #0cf;
  border-radius: 10rem;
  z-index: -2;
}
.button:before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 100%;
  background-color: #008fb3;
  transition: all 0.3s;
  border-radius: 10rem;
  z-index: -1;
}
.button:hover {
  color: #fff;
}
.button:hover:before {
  width: 100%;
}

/* optional reset for presentation */
* {
  font-family: Arial ,Sans-serif,Tahoma ;
  text-decoration: none;
  font-size: 20px;
}

.container {
  padding-top: 50px;
  margin: 0 auto;
  width: 100%;
  text-align: center;
}

h1 {
  text-transform: uppercase;
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #777;
}

span {
  display: block;
  margin-top: 2rem;
  font-size: 0.7rem;
  color: #777;
}
span a {
  font-size: 0.7rem;
  color: #999;
  text-decoration: underline;
}