reset cdn
HTML 로 만든 결과물
<header id="hd">
<div class="container d-flex justify-content-between align-items-center">
<h1><a href=""><img src="" alt="">세계의 미술작품</a></h1>
<ul id="gnb" class="d-flex">
<li><a href="">소장처별</a></li>
<li><a href="">장르별</a></li>
<li><a href="">테마별</a></li>
<li><a href="">시대별</a></li>
</ul>
</div>
</header>

reset cdn 추가
<style>
*{ margin: 0; padding: 0; }
a{ color: #222222; text-decoration: none; }
li, dt, dd{ list-style: none; }
.rel { position: relative; }
.abs { position: absolute; }
.d-block{ display: block; }
.d-block{ display: flex; }
.d-block{ display: none; }
.d-flex{ display: flex; }
.justify-content-between{ justify-content: space-between; }
.align-items-center{ align-items: center; }
</style>

공통 클래스 (CSS 스타일 추가)
<style>
#hd{ background-color: black;}
#hd a{ color: white; }
#hd h1 a { font-size: 2em; }
#gnb { margin-left: auto; }
#gnb li{ margin-left: 2rem; }
</style>
