https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_image_responsive
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.responsive {
width: 100%;
height: auto;
}
</style>
</head>
<body>
<h2>Responsive Images</h2>
<p>If you want the image to scale both up and down on responsiveness, set the CSS width property to 100% and height to auto.</p>
<p>Resize the browser window to see the effect.</p>
<img src="img_nature.jpg" alt="Nature" class="responsive" width="600" height="400">
</body>
</html>
