@atlaskit/editor-core/dist/es2019/ui/EditorContentContainer/styles/firstBlockNodeStyles.js

A package contains Atlassian editor core functionality

/* eslint-disable @atlaskit/ui-styling-standard/use-compiled */
import { css } from '@emotion/react';
import { PanelSharedCssClassName } from '@atlaskit/editor-common/panel';
import { expandClassNames, SmartCardSharedCssClassName } from '@atlaskit/editor-common/styles';
import { CodeBlockSharedCssClassName } from './codeBlockStyles';

// eslint-disable-next-line @atlaskit/ui-styling-standard/no-exported-styles
export const firstBlockNodeStyles = css({
  // eslint-disable-next-line @atlaskit/ui-styling-standard/no-nested-selectors
  '.ProseMirror': {
    // eslint-disable-next-line @atlaskit/ui-styling-standard/no-imported-style-values,@atlaskit/ui-styling-standard/no-nested-selectors,@atlaskit/ui-styling-standard/no-unsafe-values
    [`> .${PanelSharedCssClassName.prefix}, > .${CodeBlockSharedCssClassName.CODEBLOCK_CONTAINER}, > .${SmartCardSharedCssClassName.BLOCK_CARD_CONTAINER}, > div[data-task-list-local-id], > div[data-layout-section], > .${expandClassNames.prefix}`]: {
      // eslint-disable-next-line @atlaskit/ui-styling-standard/no-unsafe-selectors
      '&:first-child': {
        marginTop: 0
      }
    },
    // eslint-disable-next-line @atlaskit/ui-styling-standard/no-nested-selectors,@atlaskit/ui-styling-standard/no-unsafe-selectors
    '> hr:first-child, > .ProseMirror-widget:first-child + hr': {
      marginTop: 0
    }
  }
});