Html&Css

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>문서 제목</title>
</head>
<body>
    <!-- 웹 페이지 내용이 여기에 들어갑니다 -->
</body>
</html>

Header
navigation bar
main content
sidebar
footer

Grid

0 ~ 639 (360): 8 margin, 16 gutter, 4 col
640 ~ 1023 (768): 24 margin, 16 gutter, 8 col
1023 ~ 1439(1024): 24 margin, 24 gutter, 12 col
1440 ~ (1440): 24 margin, 24 margin, 12 col

TailwindCSS