/* ---- Return To Top ---- */
#return-to-top {
    position: fixed;
    bottom: 50px;
    right: 50px;
    background: rgb(0, 0, 0);
    background: rgba(0, 0, 0, 0.7);
    width: 50px;
    height: 50px;
    display: block;
    text-decoration: none;
    -webkit-border-radius: 35px;
    -moz-border-radius: 35px;
    border-radius: 35px;
    display: none;
    -webkit-transition: all 0.3s linear;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
    z-index: 999;
}
#return-to-top svg {
    width: 20px;
    height: 20px;
    fill: #fff;
    position: relative;
    left: 15px;
    top: 10px; 
    transition: all 0.5s;
}
#return-to-top:hover {
    background: rgba(0, 0, 0, 0.9);
}
#return-to-top::before, #return-to-top::after {
    content: "";
    display: block;
    position: absolute;
    border: 1px solid #999;
    left: -20px;
    right: -20px;
    top: -20px;
    bottom: -20px;
    border-radius: 50%;
    animation: animate 1.5s linear infinite;
    backface-visibility: hidden;
}
#return-to-top::after {
    animation-delay: 0.5s;
}
@keyframes animate {
    0% {
      transform: scale(0.5);
      opacity: 0;
    }
    50% {
      opacity: 1;
    }
    100% {
      transform: scale(1.2);
      opacity: 0;
    }
  }