a.SNSbtn  {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 4px;
    margin: 5px 0;
    opacity: 0.85;
    display: inline-block;
    font-size: 17px;
    line-height: 20px;
    text-decoration: none; /* remove underline from anchors */
  }

  .fb {
    background-color: #3B5998;
    color: white;
  }
  
  .twitter {
    background-color: #55ACEE;
    color: white;
  }
  
  .google {
    background-color: #dd4b39;
    color: white;
  }