.visibility.example .overlay {
  background-color: #FFFFFF;
  padding: 0em;
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0);
  transition: all 0.5s ease;
  background: transparent;
}
/* change style */
.visibility.example .fixed.overlay {
  position: fixed;
  padding: 1em;
  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.2);
}