#editor {
  width: 90%;
  margin-top: 10px;
}

#editor .thread {
  display: inline-block;
  height: 20px;
  background-color: transparent;
  border: 2px solid rgba(255, 255, 255, 0.75);
  margin: 0px 1px;
  box-sizing: border-box;
}

#editor input {
  width: auto;
  margin: 4px;
  vertical-align: super;
}

.popup {
  max-width: 132px;
  position: absolute;
  background-color: rgba(255, 255, 255, 0.75);
  padding: 1px;
  line-height: 0px;
}

.popup .item {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  margin: 1px;
}