popup.css

body {
  margin: 0;
  font-family: Arial, sans-serif;
  -webkit-user-select: none;
}
div#options {
  border: solid 1px gray;
  border-radius: 2px;
  width: 150px;
}
div#options div.option {
  text-align: center;
  padding: 8px;
  background-color: #eeeeee;
  border-bottom: solid 1px gray;
  cursor: pointer;
}
div#options div.option:hover {
  background-color: #dddddd;
}
div#options div.option:active {
  background-color: #cccccc;
}
div#options div.option:last-child {
  border-bottom: none;
}