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 CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

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 class="header-box">
    <button class="night-mode-button">Night Mode</button>
  <main class="content-box">
    <div class="content-inner">
      <h1>Hello there, I'm a Headline</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Veritatis dolorum nobis cumque recusandae quos, dolores ullam, repellat iusto doloribus maiores voluptate ut velit eligendi sequi, aliquam quas quam quaerat. Dignissimos est dolores unde non
        quibusdam eos eius deleniti nam alias.</p>
      <img alt="Sample Colorful Image" class="image" src="https://i2.imgpile.com/i/QeH9i.jpg" />
      <p>Eius aliquam pariatur praesentium consectetur rerum nam dolor sed maxime laboriosam officiis soluta totam eos fugit velit, itaque rem quos nesciunt porro, deleniti. Atque accusamus incidunt minus excepturi iusto ipsam aliquam sit laboriosam, corporis
      beatae aliquid non nulla, sunt minima!</p>

              .header-box {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  padding: 1em;
  text-align: center;  
  background: #dd5678;
  color: #fff;
  z-index: 2;
  > .night-mode-button {
    display: inline-block;
    padding: .5em;
    text-decoration: none;
    color: white;
    background: red;
    border: none;
    border-radius: .5em;
    cursor: pointer;

.content-box {
  position: relative;
  padding: 5em 0 1em;
  z-index: 1;
  color: darkBlue;
  background: lightYellow;
.content-inner {
  & {
    min-width: 17.5em;
    width: 50%;
    margin: 0 auto;
    padding: 1em;
    border: solid;    
  > .image {
    width: 100%;

 * Wonderful CSS filter trick by Leo Nikkilä
 * @link https://lnikki.la/articles/night-mode-css-filter/
.content-box.-nightmode {
  & {
    // Ensures that night mode colors are black and white
    background: #000 !important;
    color: #333 !important;    
  .content-inner {
    &, img, video {
      -webkit-filter: invert(1) hue-rotate(180deg);
      filter: invert(1) hue-rotate(180deg);    
  var button = $('.night-mode-button');
  var container = $('.content-box');
  button.click(function() {
Loading ..................