body{
    margin: 0;
    padding: 0;
    background: #2980b9 url('https://static.tumblr.com/03fbbc566b081016810402488936fbae/pqpk3dn/MRSmlzpj3/tumblr_static_bg3.png') repeat 0 0;
    background-size: contain;
    background-attachment: fixed;
    -webkit-animation: 50s linear 0s normal none infinite animate;
    -moz-animation: 50s linear 0s normal none infinite animate;
    -ms-animation: 50s linear 0s normal none infinite animate;
    -o-animation: 50s linear 0s normal none infinite animate;
    animation: 50s linear 0s normal none infinite animate;
}

@-webkit-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@-moz-keyframes animate{
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@-ms-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px;}
}

@-o-keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

@keyframes animate {
    from {background-position: 0 0;}
    to {background-position: 1000px 0;}
}

/* SIDE NAV */
li {
    list-style: none;
}

.sidenav {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  /* background-color: #111; */
  background-color: #fff;
  overflow-x: hidden;
  transition: 0.5s;
  padding-top: 60px;
}

.sidenav a {
  text-decoration: none;
  font-size: 25px;
  color: coral;
  display: block;
  transition: 0.3s;
}

.sidenav a:hover {
  color: black;
}

.sidenav .closebtn {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 36px;
  margin-left: 50px;
}

#main {
  transition: margin-left .5s;
  padding: 16px;
}

@media screen and (max-height: 450px) {
  .sidenav {padding-top: 15px;}
  .sidenav a {font-size: 18px;}
}

.lista-icon {
  color: coral;
}

/* Boton de ayuda */
.ayuda {
  position:fixed;
  width:60px;
  height:60px;
  bottom:20px;
  right: 20px;
  color:#FFF;
  border-radius:50px;
  text-align:center;
  font-size:30px;
  z-index:1190;
  filter: drop-shadow(0 0 0.75rem black);
}

.ayuda-icon {
  margin-top:13px;
}