How to use Bootstrap Responsive CSS with atom?

Hello everyone, I’ve just started learning to code and I’m using atom editor.
However, I can’t use bootstrap in atom and was wondering if anyone could tell me how?

Don’t you add a <link> tag to your HTML page? Your page should look like this

(code source)

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <!-- or you can download a local copy of bootstrap.min.css -->
  </head>

  <body>
    <h1>Hello, world!</h1>

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
  </body>

</html>

I did this and still isn’t working

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css"/>


<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
<style>
  h2 {
    font-family: Lobster, Monospace;
  }

  .thick-green-border {
    border-color: green;
    border-width: 10px;
    border-style: solid;
    border-radius: 50%;
  }

</style>

<div class="container-fluid">
  <div class="row">
    <div class="col-xs-8">
      <h2 class="text-primary text-center">CatPhotoApp</h2>
    </div>
    <div class="col-xs-4">
      <a href="#"><img class="img-responsive thick-green-border" src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back. "></a>
    </div>
  </div>
  <img src="https://bit.ly/fcc-running-cats" class="img-responsive" alt="Three kittens running towards the camera. ">
  <div class="row">
    <div class="col-xs-4">
      <button class="btn btn-block btn-primary"><i class="fa fa-thumbs-up"></i> Like</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-info"><i class="fa fa-info-circle"></i> Info</button>
    </div>
    <div class="col-xs-4">
      <button class="btn btn-block btn-danger"><i class="fa fa-trash"></i> Delete</button>
    </div>
  </div>
  <p>Things cats <span class="text-danger">love:</span></p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
  <form action="/submit-cat-photo">
    <div class="row">
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Indoor</label>
      </div>
      <div class="col-xs-6">
        <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
      </div>
    </div>
    <div class="row">
      <div class="col-xs-4">
        <label><input type="checkbox" name="personality"> Loving</label>
      </div>
      <div class="col-xs-4">
        <label><input type="checkbox" name="personality"> Lazy</label>
      </div>
      <div class="col-xs-4">
        <label><input type="checkbox" name="personality"> Crazy</label>
      </div>
    </div>
    <div class="row">
    <div class="col-xs-7"><input type="text" class="form-control" placeholder="cat photo URL" required></div>
   <div class="col-xs-5"> <button type="submit" class="btn btn-primary"><i class="fa fa-paper-plane"></i> Submit</button></div>
    </div>
  </form>
</div>

I think you should add https: in the <link> tags.

Make sure you’re putting your stylesheet links and style tags inside of a head tag, like in @kevcomedia’s example. There’s a lot more to structuring an HTML document if you’re not working in CodePen.