문체가 · 문체를
writing style, style
Example
그 작가는 간결한 문체로 유명해요.
That author is famous for his concise writing style.
Word parts
문 writing+체 form
Literally 'writing body', the form a text takes.
Good to know
-체 also names speech styles and fonts: 해요체, 합니다체, 궁서체.