Syntax For Media Query
@media not|only mediatype and (expressions) { CSS-Code; }
<!DOCTYPE html> <html> <head> <title>How Can I Define CSS Media Queries For HTML Pages</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"/> </head> <style> body { background-color: #800033; } * { box-sizing: border-box; } /* Create four equal columns that floats next to each other */ .column { float: left; width: 25%; padding: 20px; } /* Clear floats after the columns */ .row:after { content: ""; display: table; clear: both; } /* On screens that are 992px wide or less, go from four columns to two columns */ @media screen and (max-width: 992px) { .column { width: 50%; } } /* On screens that are 600px wide or less, make the columns stack on top of each other instead of next to each other */ @media screen and (max-width: 600px) { .column { width: 100%; } } </style> <body> <br/><br/> <div class="container"> <br> <div class="text-center"> <h1 id="color" style="color: white;">Define CSS Media Queries For HTML Pages</h1> </div> <br> <div class="row"> <div class="column" style="background-color:#aaa;"> <h2>Am Column 1</h2> <p>Am P element text..</p> </div> <div class="column" style="background-color:#bbb;"> <h2>Am Column 2</h2> <p>Am P element text..</p> </div> <div class="column" style="background-color:#ccc;"> <h2>Am Column 3</h2> <p>Am P element text..</p> </div> <div class="column" style="background-color:#ddd;"> <h2>Am Column 4</h2> <p>Am P element text..</p> </div> </div> </div> </body> </html>