.backbtn {
  border-radius: 4px;
  background-color: #f4511e;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 20px;
  padding: 12px;
  width: 100px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}

.backbtn span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.backbtn span:after {
  content: '\21BA';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}

.backbtn:hover span {
  padding-right: 25px;
}

.backbtn:hover span:after {
  opacity: 1;
  right: 0;
}

.fancy-btn{
  display:inline-block; 
  position:relative;
  padding:2px 5px;
  border:2px solid #fda;
  color:#000;
  font-family:'Dancing Script',serif;
  font-style:italic;
  font-size:30px;
  text-decoration:none;
  margin:10px auto;
  transition: color 0.4s
}
.fancy-btn:after{
  content:" ";
  border:2px solid rgba(0,0,0,0);
  display:inline-block;
  width:100%;
  height:100%;
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  margin:auto;
  transition:all 0.4s;
}
.fancy-btn:hover{
  color:#ff4000;
}
.fancy-btn:hover:after{  
  border:2px solid #fda;
  width: calc(100% - 10px);
  height: calc(100% + 10px); 
}