.sam_btn {
  display: inline-block;
  border-radius: 35px;
  text-align: center;
  padding: 0 15px;
  text-transform: uppercase;
  color: #000;
  border: 2px solid #000;
  -webkit-transition: all 0.3s ease-in-out;
  -moz-transition: all 0.3s ease-in-out;
  -ms-transition: all 0.3s ease-in-out;
  -o-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
  outline: none;
  position: relative;
  cursor: pointer;
  font-weight: 700;
  font-family: 'Samsung Sharp Sans';
  width: 180px;
  height: 60px;
  line-height: 60px;
  text-decoration: none;
}
button.sam_btn {
  background: transparent;
}
.sam_btn:hover {
  background-color: #000;
  color: #fff;
}