button.back-to-top{
    margin: 0 !important;
    padding: 0 !important;
    background: #fff;
      height: 0px;
    width: 0px;
    overflow: hidden;
      border-radius: 50px;
      -webkit-border-radius: 50px;
      -moz-border-radius: 50px;
    color: transparent;
      clear: both;
    visibility: hidden;
    position: fixed;
    cursor: pointer;
    display: block;
    border: none;
    right: 50px;
      bottom: 75px;
    font-size: 0px;
    outline: 0 !important;
    z-index: 99;
    -webkit-transition: all .3s ease-in-out;
    transition: all .3s ease-in-out;
  }
  button.back-to-top:hover,
  button.back-to-top:active,
  
  button.back-to-top::before,
  button.back-to-top::after {
    content: "";
      display: block;
    
      border-bottom: solid 10px #EA5D5F;
      border-left: solid 10px transparent;
      line-height: 0;
      border-right: solid 10px transparent;
      height: 0;
      margin: 18px auto 0;
      width: 0;
    border-radius:20px;
    visibility: hidden;
  }
  button.back-to-top.show::after,
  button.back-to-top.show::before{
    visibility: visible;
  }
  button.back-to-top::after {
    border-bottom-color:#fff;
        position: relative;
    top:-24px;
  }
  button.back-to-top.show {
    display: block;
    background: #fff;
    color: #00ab6c;
    font-size: 25px;
    right: 25px;
      bottom: 50px;
    height: 50px;
    width: 50px;
    visibility: visible;
      box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
    -webkit-box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
    -moz-box-shadow: 0px 2px 4px 1px rgba(0, 0, 0, 0.25);
  }
  button.back-to-top.show:active {
    box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
    -webkit-box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
    -moz-box-shadow: 0px 4px 8px 2px rgba(0, 0, 0, 0.25);
  }