colab

.toc-cell-focused{
  background-color:gold;
}

/* .focused{
  border:1px solid red

} */

.focused .main-content{
  /* border-style: inset; */
  /* border-top: 10px solid red; */
}

.focused .current-line{
  background-color:yellow;
}

.focused .selected-text{
  background-color:yellow;
}

.focused .cell-gutter{
  background-color:gold;
}

.focused .markdown{
  background-color:yellow;
}

 .focused .markdown code, .focused .markdown pre{
   background-color:yellow;
   color:blue;
 }
 
  .toc-cell{
   margin-top: 3px;
   margin-bottom: 3px;
   border-left:1px solid grey;
 }

JupyterLab

h1{
  color:royalblue;
  font-weight:bold
}

h2{
  color: dodgerblue;
}
h3{
  color:deepskyblue
}

.jp-OutputArea-output{
  /* background-color:gei; */
}

.jp-OutputArea-output pre{
  color:olivedrab;
  font-size:small;
}

.jp-mod-active .jp-Collapser-child{
  background-color:gold;
}

.jp-MarkdownOutput pre, .jp-MarkdownOutput code{
  background-color:transparent;
  color:olive;
  
}

.jp-mod-active .jp-CodeMirrorEditor, 
.jp-mod-active .jp-MarkdownOutput{
  background-color:lightyellow;
}

.jp-mod-active .jp-InputPrompt{
  background-color:gold;
}

.jp-CodeMirrorEditor{
  border:1px solid slategrey
}

.jp-RenderedHTML table td{
  margin:0px;
  padding: 1px
}



.toc-level-size-1{
  padding-left:0px;
  margin-top:5px;
  overflow: hidden;
  white-space: nowrap;
}

.toc-level-size-2{
  padding-left:12px;
  color:dodgerblue;
  /* text-overflow: ellipsis; */
  overflow: hidden;
  white-space: nowrap;
}

.toc-level-size-3{
  padding-left:24px;
  color:grey;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;

}


.jp-TableOfContents-content li{
 padding:0px;
 background-color:beige;
 margin-top:5px;
 box-shadow: 1px 0px 1px rgba(0,0,0,0.5)
}

.jp-TableOfContents-content li:hover{
 background-color:gold;
}

google doc

.navigation-item{
  height:24px;
}
.navigation-item-level-0{
  color:black;
}

.navigation-item-level-1{
  padding-left: 16px;
  color:crimson;
}

.navigation-item-level-2{
  padding-left: 24px;
  color:
}