.btn_submit {
  margin: .5em .10em .5em 0;
  text-decoration: none;
  display: inline-block;
  /* padding: .7em 2em; */
  border-radius: 3px;
  border-color:black;
  /* box-shadow: 0 4px 4px rgba(0,0,0,.2), 0 2px 3px -2px rgba(0,0,0,.15); */
  background-color: white;
  text-align:center;
  /* width: 50%; */
  min-width: 4em;
  max-width: 600px;
  padding: 5px;
  font-size:1.4em;
  cursor : pointer;  
  color: black;  
    
}
.btn:hover{   
    text-decoration: none;
    /* box-shadow: 0 13px 20px -3px rgba(0,0,0,.24); */
    background-color: #e1ebf7;
    -webkit-tap-highlight-color: transparent;
}

.back {
    padding: 3em 1em;
    text-align: right;
}

.btn_back{
  /* margin: .5em .10em .5em 0; */
  text-decoration: none;
  display: inline-block;
  position: relative;
  /* padding: .7em 2em; */
  border-radius: 3px;
  border-color:black;
  /* box-shadow: 0 4px 4px rgba(0,0,0,.2), 0 2px 3px -2px rgba(0,0,0,.15); */
  background-color: white;
  text-align:center;
  width: 50%;
  height: 3em;
  min-width: 11em;
  max-width: 10em;
  padding: 10px;
  font-size:1em;
  cursor : pointer; 
  color: black; 
}
.btn_back:hover{   
    text-decoration: none;
    /* box-shadow: 0 13px 20px -3px rgba(0,0,0,.24); */
    background-color: #e1ebf7;
    -webkit-tap-highlight-color: transparent;
}

.btn_back a {
color: black;
text-decoration: none;
display: block;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
line-height: 2.6em;
}