How to create a responsive header with CSS?

CSS Web Development Front End Technology

Following is the code to create a responsive header with CSS −

Example

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box;}
nav {
   overflow: hidden;
   background-color: #330b7c;
   padding: 10px;
}
.links {
   font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
   font-weight: bold;
   float: left;
   color:white;
   text-align: center;
   padding: 12px;
   text-decoration: none;
   font-size: 18px;
   line-height: 25px;
   border-radius: 4px;
}
nav .logo {
   font-size: 25px;
   font-weight: bold;
}
nav .links:hover {
   background-color: rgb(214, 238, 77);
   color: rgb(42, 10, 94);
}
nav .selected {
   background-color: dodgerblue;
   color: white;
}
.rightSection {
   float: right;
}
@media screen and (max-width: 870px) {
   nav .links {
      float: none;
      display: block;
      text-align: left;
   }
   .rightSection {
      float: none;
   }
}
</style>
</head>
<body>
<nav>
<a class="links logo" href="#">Company Logo/Image</a>
<div class="rightSection">
<a class="selected links" href="h">Home</a>
<a class="links" href="#">Contact Us</a>
<a class="links" href="#">About Us</a>
<a class="links" href="#">More Info</a>
<a class="links" href="#">Register</a>
</nav>
</body>
</html>