cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <header>
  <h1>Fluid Header</h1>
</header>

<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Natus nisi voluptate delectus illo consequatur voluptas aut, enim nesciunt, veniam beatae voluptates sint id at corrupti magnam velit unde debitis minus!</p>
<p>Quae quia numquam dolore porro neque magnam saepe magni, aut, ut itaque explicabo facere exercitationem nam cumque voluptatibus molestias adipisci labore fugit maiores qui, similique dignissimos non, consectetur! Ullam, ratione.</p>
<p>Explicabo pariatur, provident doloribus minima ex ut, impedit accusantium maxime culpa sequi voluptate necessitatibus earum. Recusandae minima dicta, earum praesentium! Dolorum in enim, sunt ullam sed provident accusamus culpa numquam.</p>
<p>Est corporis non illum dolorum inventore dolores consectetur quod reiciendis asperiores similique quas excepturi vero vel accusantium delectus cupiditate veritatis dolorem voluptatem, veniam cumque laboriosam, nesciunt eum nisi consequuntur placeat.</p>
<p>Minus sapiente eos ad deleniti quia necessitatibus, itaque quibusdam, nisi explicabo soluta facere sed harum iste nihil vel asperiores dolor adipisci rerum ea nobis voluptatum cum illum velit doloremque reiciendis!</p>
            
          
!
            
              header {
  background: purple;
  color: white;
  padding: 10vmin 1rem;
  text-align: center;
  margin: 0 0 8vmin 0;
}
header h1 {
  margin: 0;
  font-size: 5rem;
  font-size: calc(24px + (48 - 24) * ((100vw - 300px) / (1600 - 300)));

}
p {
  max-width: 600px;
  margin: 0 auto 1rem;
  padding: 0 1rem;
  text-indent: 1rem;
}



body {
  margin: 0;
  font-family: 'Open Sans', sans-serif;
}
h1 {
  font-family: 'Montserrat', sans-serif;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.
Loading ..................

Console