CodePen Embed - position: sticky2

<header>header</header>
<div class="container">
  <nav>nav</nav>
</div>

body{
  height: 300vh;
}
header{
  height: 80px;
  background: pink;
}
nav{
  padding: 10px;
  background: lightblue;
  position: sticky;
  top:0;
}

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