:root {
  --san-serif: Helvetica, Arial, sans-serif;
  --serif: Charter, 'Bitstream Charter', 'Sitka Text', Cambria, serif;
  --monospace: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, 'DejaVu Sans Mono', monospace;
}

:lang(ja) {
  --san-serif: 'ヒラギノ角ゴ ProN', 'Hiragino Kaku Gothic ProN', '游ゴシック', '游ゴシック体', YuGothic , 'Yu Gothic', 'メイリオ', Meiryo, 'ＭＳ ゴシック', 'MS Gothic', HiraKakuProN-W3, 'TakaoExゴシック', TakaoExGothic, 'MotoyaLCedar', 'Droid Sans Japanese', sans-serif;
  --serif: 'ヒラギノ明朝 ProN', 'Hiragino Mincho ProN', '游明朝', '游明朝体', YuMincho, 'Yu Mincho', 'ＭＳ 明朝', 'MS Mincho', HiraMinProN-W3, 'TakaoEx明朝', TakaoExMincho, 'MotoyaLCedar', 'Droid Sans Japanese', serif;
}