insomnia/packages/insomnia-app/app/ui/css/components/markdown-editor.less

.markdown-editor {
  border: 1px solid var(--hl-md);
  box-sizing: border-box;

  .markdown-editor__edit {
    padding: var(--padding-xs) var(--padding-sm);
  }

  &.markdown-editor--dynamic-height {
    .CodeMirror-scroll {
      // Not sure why this style doesn't work on .CodeMirror...
      max-height: 30vh;
    }

    .input {
      height: auto !important;
    }
  }

  &:not(.markdown-editor--dynamic-height) .markdown-editor__edit {
    height: 100%;
    display: grid;
    grid-template-rows: 1fr auto;

    .input {
      height: 100%;
    }
  }

  .markdown-editor__preview {
    max-height: 35vh;
    padding: var(--padding-sm);
    overflow: auto;
  }
}