/* VOLTAR AO TOPO */
#backToTop {
  position:fixed;
  bottom:20px;
  right:20px;
  width:45px;
  height:45px;
  border:none;
  border-radius:50%;
  background:#333;
  color:#fff;
  font-size:20px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 12px rgba(0,0,0,0.3);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s;
}

#backToTop.show {
  opacity:1;
  pointer-events:auto;
}
/* FIM DE VOLTAR AO TOPO */