#nua-top {
  display: inline-block;
  /*background-color: #1d2125;*/
  width: 50px;
  height: 50px;
  text-align: center;
  border-radius: 4px;
  position: fixed;
  bottom: 15px;
  right: 15px;
  transition: background-color .3s, opacity .5s, visibility .5s;
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

#nua-top:after {
  /*content: "\f078";*/
  /*font-family: FontAwesome;*/
  font-weight: normal;
  font-style: normal;
  font-size: 2em;
  line-height: 50px;
  color: #fff;
}

#nua-top:hover {
  cursor: pointer;
  /*background-color: #333;*/
  color: #0ebae0;
}

#nua-top:active {
  /*background-color: #555;*/
  color: #0ebae0;
}

#nua-top.show {
  opacity: 0.3;
  visibility: visible;
}

@media (min-width: 500px) {
  #nua-top {
    margin: 30px;
  }
}

#nua-top-icon {
  color: #eeeeee;
}