resources/bookmark_manager/css/menu.css

menu {
  display: none;
  position: absolute;
  border: 1px solid #999;
  -webkit-box-shadow: 2px 2px 3px hsla(0, 0%, 0%, .3);
  color: black;
  background-color: hsla(213, 0%, 100%, .95);
  left: 0;
  white-space: nowrap;
  z-index: 2;
  padding: 1px;
  margin: 0;
  cursor: default;
}

menu > * {
  display: block;
  margin: 0;
  width: 100%;
  text-align: start;
}

menu > :not(hr) {
  -webkit-appearance: none;
  background: transparent;
  font: inherit;
  border: 0;
  padding: 3px 8px;
  overflow: hidden;
  text-overflow: ellipsis;
}

menu > hr {
  border: 0;
  border-top: 1px solid rgb(153, 153, 153);
  margin: 2px 0;
}

menu > [hidden] {
  display: none;
}

menu > [selected] {
  background-color: hsl(213, 66%, 57%);
  color: white;
}