부트 스트랩으로 따온걸 적용하면 가로로 적용이 되어야 하는데 세로로 적용이 됩니다
위에 처럼 세로로만 적용이 되어서 어느부분이 문제인지를 모르겠습니다
작성한 코드 및 에러 메세지
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>항해 10기 미니 프로젝트</title> </head> <link href="https://fonts.googleapis.com/css2?family=Jua&family=Nanum+Myeongjo:wght@400;700;800&family=Noto+Serif+KR:wght@200&display=swap" rel="stylesheet"> <style> * { font-family: 'Noto Serif KR', serif; } .mypost { color: white; max-width: 100%; height: 400px; background-image: linear-gradient(0deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url("https://now.rememberapp.co.kr/wp-content/uploads/2020/05/%E1%84%82%E1%85%A6%E1%86%BA%E1%84%91%E1%85%B3%E1%86%AF%E1%84%85%E1%85%B5%E1%86%A8%E1%84%89%E1%85%B3.png"); background-size: cover; background-position: center; display: flex; flex-direction: column; justify-content: center; align-items: center; } .mypost > button { width: 200px; height: 50px; color: white; background-color: transparent; border-color: white; border-radius: 20px; border: 1px solid white; } .mypost > button:hover { border: 2px solid white; } .mybtn { width: 100px; height: 50px; color: black; background-color: white; border-radius: 10px; margin-left: 150%; } </style> <body> <div class="mypost"> <div> <button class="mybtn">로그인</button> <h1>넷플릭스 인상깊은 작품</h1> </div> <button>작품 추천하기</button> </div> <div> <div class="row row-cols-1 row-cols-md-3 g-4"> <div class="col"> <div class="card h-100"> <img src="..." class="card-img-top" alt="..."> <div class="card-body"> <h5 class="card-title">Card title</h5> <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p> </div> </div> </div> <div class="col"> <div class="card h-100"> <img src="..." class="card-img-top" alt="..."> <div class="card-body"> <h5 class="card-title">Card title</h5> <p class="card-text">This is a short card.</p> </div> </div> </div> <div class="col"> <div class="card h-100"> <img src="..." class="card-img-top" alt="..."> <div class="card-body"> <h5 class="card-title">Card title</h5> <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p> </div> </div> </div> <div class="col"> <div class="card h-100"> <img src="..." class="card-img-top" alt="..."> <div class="card-body"> <h5 class="card-title">Card title</h5> <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p> </div> </div> </div> </div> </div> </body> </html>