how to organized nav bar and fixed nav bar code example

Example 1: fixed navigation menu

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 1200px;
  font-size: 18px;
  font-family: sans-serif;
  color: #5D6063;
}

a:link,
a:visited {
  color: #5D6063;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.header {
  position: fixed;
  display: flex;
  justify-content: space-between;
  
  width: 100%;
  padding: 50px;
  background: #D6E9FE;
}

Example 2: how to fix nav bar position

<div class="navbar">
  <a href="#home">Home</a>
  <a href="#news">News</a>
  
<a href="#contact">Contact</a>
</div>

<div class="main">
  
<p>Some text some text some text some text..</p>
</div>