#side-menu {
  background: linear-gradient(135deg, #172a74, #21a9af);
  border-color: #184e8e;
  opacity: 1;
}

#side-menu .close {
  color: #efefef;
  text-shadow: none;
  opacity: .7;
}

#side-menu .contents {
  margin-top: 10px;
}