@media screen and (max-width: 768px) read it as "the screen is less than 768px wide"@media screen and (min-width: 1024px) read it as "the screen is greater than 1024px wide"<!doctype html>
<html>
<head>
<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1" />
<link rel="stylesheet" href="path-to-css-folder]/bootstrap.min.css">
</head>
<body>
<div class="container">
[your html here]
</div>
<script src="[path-to-js-folder]/bootstrap.min.js"><script>
</body>
</html>
<--The bulk of your CSS goes up here--><-- Media queries start here--><--Boostrap XL (Large Desktop)-->
@media screen and (min-width: 1200px){}<--Bootstrap L (Desktop)-->@media screen and (max-width: 992px){}<--Bootstrap M (Tablet: Portrait)-->@media screen and (max-width: 768px){}<--Bootstrap S:-->@media screen and (max-width: 576px){}<--(if necessary) Mobile: Landscape-->@media screen and (max-width: 480px){}<--(if necessary) Mobile: Portrait-->@media screen and (max-width: 320px){}