<commit_before>div.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  height: 30px;
}

div.tab .button {
  display: inline;
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 0 10px;
  transition: 0.3s;
  height: 30px;
  line-height: 30px;
  font-size: small;
}

div.tab .button:hover {
  background-color: #ddd;
}<commit_msg>fixed problem in hiding Topics tab when there is no topics tree in CHM file.<commit_after>div.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  height: 30px;
}

div.tab .button {
  /*display: inline;*/
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 0 10px;
  transition: 0.3s;
  height: 30px;
  line-height: 30px;
  font-size: small;
}

div.tab .button:hover {
  background-color: #ddd;
}
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{'dir': 'git-commits-cleaned', 'id': '5374060', 'n_tokens_mistral': 443, 'n_tokens_neox': 407, 'n_words': 114}