W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial, Helvetica, sans-serif}
* {box-sizing: border-box;}

.bg-img {
  /* The image used */
  background-image: url("img_nature.jpg");

min-height: 380px;

/* Center and scale the image nicely */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  
  /* Needed to position the navbar */
  position: relative;
}

/* Position the navbar container inside the image */
.container {
  position: absolute;
  margin: 20px;
  width: auto;
}

/* The navbar */
.topnav {
  overflow: hidden;
  background-color: #333;
}

/* Navbar links */
.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}
</style>
</head>
<body>

<h2>Navbar on Image</h2>
<div class="bg-img">
  <div class="container">
    <div class="topnav">
      <a href="#home">Home</a>
      <a href="#news">News</a>
      <a href="#contact">Contact</a>
      <a href="#about">About</a>
    </div>
  </div>
</div>

</body>
</html>

​x
 
<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1"><style>body {font-family: Arial, Helvetica, sans-serif}* {box-sizing: border-box;}​.bg-img {  /* The image used */  background-image: url("img_nature.jpg");​  min-height: 380px;​  /* Center and scale the image nicely */  background-position: center;  background-repeat: no-repeat;  background-size: cover;    /* Needed to position the navbar */  position: relative;}​/* Position the navbar container inside the image */.container {  position: absolute;  margin: 20px;  width: auto;}​/* The navbar */.topnav {  overflow: hidden;  background-color: #333;}​/* Navbar links */.topnav a {  float: left;  color: #f2f2f2;  text-align: center;  padding: 14px 16px;  text-decoration: none;  font-size: 17px;}​.topnav a:hover {