codemirror-collab-ext-master/example/example.css

body {
  margin: 5px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

h1 {
  font-family: Helvetica, sans-serif;
  font-size: 24px;
  border-radius: 4px;
  border: 1px solid darkgray;
  background: #e1e1e1;
  padding: 10px;
}

h2 {
  font-family: Helvetica, sans-serif;
  font-size: 18px;
  border-bottom: 1px solid darkgray;
  margin-bottom: 5px;
}

.description {
  font-family: Helvetica, sans-serif;
  border-radius: 4px;
  border: 1px solid darkgray;
  background: #e1e1e1;
  padding: 4px 10px;
  margin-bottom: 5px;
}

.editors {
  display: flex;
  flex-direction: row;
  flex: 1;
}

.editor-column {
  flex: 0.5;
  display: flex;
  flex-direction: column;
  max-width: 50%;
  box-sizing: border-box;
}

.editor-column:nth-child(1) {
  padding-right: 10px;
}

.editor-column:nth-child(2) {
  padding-left: 10px;
}

.editor {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  border: 1px solid grey;
}

.CodeMirror {
  flex: 1;
}