Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

Learn more · Versions

Babel includes JSX processing.

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.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Powered by Algolia
About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

Auto Save

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.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML 

              
                <div class="container">
  <!-- FRONT -->
  <input type="radio" name="stage" class="stage-radio" checked />
  <label class="stage front" for="instructions"></label>
  <!-- INSTRUCTIONS -->
  <input type="radio" name="stage" id="instructions" class="stage-radio" />
  <label class="stage instructions" for="stage_1"></label>
  <!-- STAGE 1 -->
  <input type="radio" name="stage" id="stage_1" class="stage-radio" />
  <form class="stage stage-1">
    <!-- MAP 1 -->
    <input type="radio" class="map-radio" id="stage_1_map_1" checked />
    <div class="map stage-1-map-1">
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- MAT -->
      <div class="object mat"
           style="--object-top: 170px; --object-left: 80px;"></div>
      <!-- CLOSED DOOR -->
      <input type="checkbox" id="stage_1_door" class="door-way-checkbox" />
      <label class="door-way door-way-close" for="stage_1_door">
        <div class="door"></div>
      </label>
      <!-- OPEN DOOR -->
      <label class="door-way door-way-open" for="stage_2">
        <div class="door"></div>
      </label>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 130px; --object-left: 55px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 100px; --object-left: 158px;"></div>
    </div>
    <!-- RESET -->
    <input type="reset" class="nav nav-reset" value="" />
    <!-- STAGE LABEL -->
    <div class="stage-label stage-label-1"></div>
  </form>
  <!-- STAGE 2 -->
  <input type="radio" name="stage" id="stage_2" class="stage-radio" />
  <form class="stage stage-2">
    <!-- DOOR KEY -->
    <input type="checkbox"
           id="stage_2_map_1_key"
           class="key-checkbox door-key" />
    <!-- MAP 1 -->
    <input type="radio" class="map-radio" id="stage_2_map_1" checked />
    <div class="map stage-2-map-1">
      <!-- DOOR KEY TRIGGER -->
      <label class="object key door-key-trigger"
             for="stage_2_map_1_key"
             style="--object-top: 175px; --object-left: 112px;"></label>
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- MAT -->
      <input type="checkbox" id="stage_2_map_1_mat" class="mat-checkbox" />
      <label class="object mat"
             for="stage_2_map_1_mat"
             style="--object-top: 170px; --object-left: 80px;"></label>
      <!-- DISABLED DOOR -->
      <div class="door-way">
        <div class="door"></div>
      </div>
      <!-- CLOSED DOOR -->
      <input type="checkbox" id="stage_2_door" class="door-way-checkbox" />
      <label class="door-way door-way-close" for="stage_2_door">
        <div class="door"></div>
      </label>
      <!-- OPEN DOOR -->
      <label class="door-way door-way-open" for="stage_3">
        <div class="door"></div>
      </label>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 130px; --object-left: 55px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 100px; --object-left: 158px;"></div>
    </div>
    <!-- RESET -->
    <input type="reset" class="nav nav-reset" value="" />
    <!-- STAGE LABEL -->
    <div class="stage-label stage-label-2"></div>
  </form>
  <!-- STAGE 3 -->
  <input type="radio" name="stage" id="stage_3" class="stage-radio" />
  <form class="stage stage-3">
    <!-- CLOSET KEY -->
    <input type="checkbox"
           id="stage_3_map_1_closet_key"
           class="key-checkbox closet-key" />
    <!-- DOOR KEY -->
    <input type="checkbox"
           id="stage_3_map_2_key"
           class="key-checkbox door-key" />
    <!-- MAP 1 -->
    <input type="radio"
           name="stage3_radio"
           id="stage_3_map_1"
           class="map-radio"
           checked />
    <div class="map stage-3-map-1">
      <!-- DISABLED WINDOW -->
      <div class="window"
           style="--lockable-bottom: 90px; --lockable-left: 55px;">
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </div>
      <!-- DISABLED CLOSET -->
      <div class="closet closet-locked">
        <div class="closet-door closet-door-left"></div>
        <div class="closet-door closet-door-right"></div>
      </div>
      <!-- CLOSED CLOSET -->
      <input type="checkbox" id="stage_3_closet" class="closet-checkbox" />
      <label class="closet closet-close" for="stage_3_closet">
         <div class="closet-door closet-door-left"></div>
         <div class="closet-door closet-door-right"></div>
      </label>
      <!-- OPEN CLOSET -->
      <label class="closet closet-open" for="stage_3_closet">
        <div class="closet-door closet-door-left"></div>
        <div class="closet-door closet-door-right"></div>
        <!-- DOOR KEY TRIGGER -->
        <label class="object key door-key-trigger"
               for="stage_3_map_2_key"
               style="--object-top: 22px; --object-left: 26px;"></label>
      </label>
      <!-- FLOWER VASE -->
      <div class="object flower-vase"
           style="--object-top: 68px; --object-left: 113px;"></div>
      <!-- RESET -->
      <input type="reset" class="nav nav-reset" value="" />
      <!-- NAVIGATION -->
      <label class="nav nav-right" for="stage_3_map_2"></label>
    </div>
    <!-- MAP 2 -->
    <input type="radio"
           name="stage3_radio"
           id="stage_3_map_2"
           class="map-radio" />
    <div class="map stage-3-map-2">
      <!-- CLOSET KEY TRIGGER -->
      <label class="object key closet-key-trigger"
             for="stage_3_map_1_closet_key"
             style="--object-top: 175px; --object-left: 112px;"></label>
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- FRAME -->
      <div class="object frame"
           for="stage_4_map_3_frame"
           style="--object-top: 40px; --object-left: 17px;"></div>
      <!-- MAT -->
      <input type="checkbox" id="stage_3_map_2_mat" class="mat-checkbox" />
      <label class="object mat"
             for="stage_3_map_2_mat"
             style="--object-top: 170px; --object-left: 80px;"></label>
      <!-- DISABLED DOOR -->
      <div class="door-way">
        <div class="door"></div>
      </div>
      <!-- CLOSED DOOR -->
      <input type="checkbox" id="stage_3_door" class="door-way-checkbox" />
      <label class="door-way door-way-close" for="stage_3_door">
        <div class="door"></div>
      </label>
      <!-- OPEN DOOR -->
      <label class="door-way door-way-open" for="stage_4">
        <div class="door"></div>
      </label>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 100px; --object-left: 55px;"></div>
      <!-- BOOK SHELF -->
      <div class="object book-shelf"
           style="--object-top: 100px; --object-left: 147px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_3_map_1"></label>
    </div>
    <!-- RESET -->
    <input type="reset" class="nav nav-reset" value="" />
    <!-- STAGE LABEL -->
    <div class="stage-label stage-label-3"></div>
  </form>
  <!-- STAGE 4 -->
  <input type="radio" name="stage" id="stage_4" class="stage-radio" />
  <form class="stage stage-4">
    <!-- DOOR KEY -->
    <input type="checkbox"
           id="stage_4_map_2_key"
           class="key-checkbox door-key" />
    <!-- SCISSORS THREAD -->
    <input type="checkbox"
           id="stage_4_map_3_window_key"
           class="key-checkbox window-key" />
    <!-- MAP 1 -->
    <input type="radio"
           name="stage4_radio"
           id="stage_4_map_1"
           class="map-radio" />
    <div class="map stage-4-map-1">
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 130px; --object-left: 55px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 100px; --object-left: 163px;"></div>
      <!-- WINDOW KEY TRIGGER -->
      <label class="object scissors window-key-trigger"
             for="stage_4_map_3_window_key"
             style="--object-top: 60px; --object-left: 175px;"></label>
      <!-- FRAME -->
      <input type="checkbox"
             id="stage_4_map_3_frame"
             class="frame-checkbox" />
      <label class="object frame"
             for="stage_4_map_3_frame"
             style="--object-top: 40px; --object-left: 140px;"></label>
      <!-- DISABLED CLOSET -->
      <div class="closet closet-locked">
        <div class="closet-door closet-door-left"></div>
        <div class="closet-door closet-door-right"></div>
      </div>
      <!-- FLOWER VASE -->
      <div class="object flower-vase"
           style="--object-top: 68px; --object-left: 113px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-right" for="stage_4_map_2"></label>
    </div>
    <!-- MAP 2 -->
    <input type="radio"
           name="stage4_radio"
           id="stage_4_map_2"
           class="map-radio"
           checked />
    <div class="map stage-4-map-2">
      <!-- MAT -->
      <div class="object mat"
           style="--object-top: 170px; --object-left: 80px;"></div>
      <!-- BOOK SHELF -->
      <div class="object book-shelf"
           style="--object-top: 110px; --object-left: 19px;"></div>
      <!-- FLOWER VASE -->
      <div class="object flower-vase"
           style="--object-top: 64px; --object-left: 40px;"></div>
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- DISABLED DOOR -->
      <div class="door-way">
        <div class="door"></div>
      </div>
      <!-- CLOSED DOOR -->
      <input type="checkbox" id="stage_4_door" class="door-way-checkbox" />
      <label class="door-way door-way-close" for="stage_4_door">
        <div class="door"></div>
      </label>
      <!-- OPEN DOOR -->
      <label class="door-way door-way-open" for="stage_5">
        <div class="door"></div>
      </label>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 123px; --object-left: 185px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 90px; --object-left: 163px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_4_map_1"></label>
      <label class="nav nav-right" for="stage_4_map_3"></label>
    </div>
    <!-- MAP 3 -->
    <input type="radio"
           name="stage4_radio"
           id="stage_4_map_3"
           class="map-radio" />
    <div class="map stage-4-map-3">
      <!-- DISABLED WINDOW -->
      <div class="window"
           style="--lockable-bottom: 95px; --lockable-left: 14px;">
        <!-- DOOR KEY FAKE TRIGGER -->
        <div class="object key door-key-trigger"
             style="--object-top: 64px; --object-left: 79px;"></div>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </div>
      <!-- CLOSED WINDOW -->
      <input type="checkbox"
             id="stage_4_map_3_window_curtain_key"
             class="window-checkbox" />
      <label class="window window-close"
             for="stage_4_map_3_window_curtain_key"
             style="--lockable-bottom: 95px; --lockable-left: 14px;">
        <!-- DOOR KEY FAKE TRIGGER -->
        <div class="object key door-key-trigger"
             style="--object-top: 64px; --object-left: 79px;"></div>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </label>
      <!-- OPEN WINDOW -->
      <div class="window window-open"
             style="--lockable-bottom: 95px; --lockable-left: 14px;">
        <!-- DOOR KEY TRIGGER -->
        <label class="object key door-key-trigger"
               for="stage_4_map_2_key"
               style="--object-top: 64px; --object-left: 79px;"></label>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </div>
      <!-- MAT -->
      <input type="checkbox" id="stage_5_map_3_mat" class="mat-checkbox" />
      <label class="object mat"
             for="stage_5_map_3_mat"
             style="--object-top: 170px; --object-left: 60px;"></label>
      <!-- BOOK SHELF -->
      <div class="object book-shelf"
           style="--object-top: 110px; --object-left: 142px;"></div>
      <!-- FLOWER VASE -->
      <div class="object flower-vase"
           style="--object-top: 64px; --object-left: 164px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_4_map_2"></label>
    </div>
    <!-- RESET -->
    <input type="reset" class="nav nav-reset" value="" />
    <!-- STAGE LABEL -->
    <div class="stage-label stage-label-4"></div>
  </form>
  <!-- STAGE 5 -->
  <input type="radio" name="stage" id="stage_5" class="stage-radio" />
  <form class="stage stage-5">
    <!-- CLOSET KEY -->
    <input type="checkbox"
           id="stage_5_map_1_closet_key"
           class="key-checkbox closet-key" />
    <!-- SCISSORS THREAD -->
    <input type="checkbox"
           id="stage_5_map_2_window_key"
           class="key-checkbox window-key" />
    <!-- DOOR KEY -->
    <input type="checkbox"
           id="stage_5_fake_key"
           class="key-checkbox fake-key" />
    <!-- DOOR KEY -->
    <input type="checkbox"
           id="stage_5_map_4_key"
           class="key-checkbox door-key" />
    <!-- MAP 1 -->
    <input type="radio"
           name="stage5_radio"
           id="stage_5_map_1"
           class="map-radio" />
    <div class="map stage-5-map-1">
      <!-- FRAME -->
      <div class="object frame"
           style="--object-top: 35px; --object-left: 168px;"></div>
      <!-- BOOK SHELF -->
      <div class="object book-shelf"
           style="--object-top: 97px; --object-left: 170px;"></div>
      <!-- MAT -->
      <div class="object mat"
           style="--object-top: 175px; --object-left: 157px;"></div>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 127px; --object-left: 53px;"></div>
      <!-- DISABLED CLOSET -->
      <div class="closet closet-locked">
        <div class="closet-door closet-door-left"></div>
        <div class="closet-door closet-door-right"></div>
      </div>
      <!-- CLOSED CLOSET -->
      <input type="checkbox" id="stage_5_closet" class="closet-checkbox" />
      <label class="closet closet-close" for="stage_5_closet">
         <div class="closet-door closet-door-left"></div>
         <div class="closet-door closet-door-right"></div>
      </label>
      <!-- OPEN CLOSET -->
      <label class="closet closet-open" for="stage_5_closet">
        <div class="closet-door closet-door-left"></div>
        <div class="closet-door closet-door-right"></div>
        <!-- DOOR KEY TRIGGER -->
        <label class="object key fake-key-trigger"
               for="stage_5_fake_key"
               style="--object-top: 22px; --object-left: 26px;"></label>
      </label>
      <!-- FLOWER VASE -->
      <div class="object flower-vase"
           style="--object-top: 68px; --object-left: 114px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-right" for="stage_5_map_2"></label>
    </div>
    <!-- MAP 2 -->
    <input type="radio"
           name="stage5_radio"
           id="stage_5_map_2"
           class="map-radio"
           checked />
    <div class="map stage-5-map-2">
      <!-- DISABLED WINDOW -->
      <div class="window"
           style="--lockable-bottom: 95px; --lockable-left: 35px;">
        <!-- DOOR KEY FAKE TRIGGER -->
        <div class="object key door-key-trigger"
             style="--object-top: 64px; --object-left: 79px;"></div>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </div>
      <!-- CLOSED WINDOW -->
      <input type="checkbox"
             id="stage_5_map_2_window_curtain_key"
             class="window-checkbox" />
      <label class="window window-close"
             for="stage_5_map_2_window_curtain_key"
             style="--lockable-bottom: 95px; --lockable-left: 35px;">
        <!-- DOOR KEY FAKE TRIGGER -->
        <div class="object key door-key-trigger"
             style="--object-top: 64px; --object-left: 79px;"></div>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </label>
      <!-- OPEN WINDOW -->
      <div class="window window-open"
             style="--lockable-bottom: 95px; --lockable-left: 35px;">
        <!-- CLOSET TRIGGER -->
        <label class="object key closet-key-trigger"
               for="stage_5_map_1_closet_key"
               style="--object-top: 64px; --object-left: 79px;"></label>
        <!-- DOOR KEY TRIGGER -->
        <label class="object key door-key-trigger"
               for="stage_5_map_4_key"
               style="--object-top: 80px; --object-left: 50px;"></label>
        <!-- CONCEAL FLOOR -->
        <input type="checkbox"
               id="stage_5_map_2_conceal_tree"
               class="conceal-tree-checkbox" />
        <label class="object conceal-tree"
               for="stage_5_map_2_conceal_tree"
               style="--object-top: 80px; --object-left: 50px;"></label>
        <div class="window-curtain window-curtain-left"></div>
        <div class="window-curtain window-curtain-right"></div>
      </div>
      <!-- MAT -->
      <div class="object mat"
           style="--object-top: 166px; --object-left: 82px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 81px; --object-left: 170px;"></div>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 134px; --object-left: 77px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_5_map_1"></label>
      <label class="nav nav-right" for="stage_5_map_3"></label>
    </div>
    <!-- MAP 3 -->
    <input type="radio"
           name="stage5_radio"
           id="stage_5_map_3"
           class="map-radio" />
    <div class="map stage-5-map-3">
      <!-- BOOK SHELF -->
      <div class="object book-shelf"
           style="--object-top: 97px; --object-left: 20px;"></div>
      <!-- DESK -->
      <div class="object desk"
           style="--object-top: 115px; --object-left: 121px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 81px; --object-left: 79px;"></div>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 134px; --object-left: 93px;"></div>
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- WINDOW KEY TRIGGER -->
      <label class="object scissors window-key-trigger"
             for="stage_5_map_2_window_key"
             style="--object-top: 190px; --object-left: 30px;"></label>
      <!-- CONCEAL FLOOR -->
      <input type="checkbox"
             id="stage_5_map_3_conceal_floor"
             class="conceal-floor-checkbox" />
      <label class="object conceal-floor"
             for="stage_5_map_3_conceal_floor"
             style="--object-top: 190px; --object-left: 30px;"></label>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_5_map_2"></label>
      <label class="nav nav-right" for="stage_5_map_4"></label>
    </div>
    <!-- MAP 4 -->
    <input type="radio"
           name="stage5_radio"
           id="stage_5_map_4"
           class="map-radio" />
    <div class="map stage-5-map-4">
      <!-- WALL CLOCK -->
      <div class="object wall-clock"
           style="--object-top: 30px; --object-left: 103px;"></div>
      <!-- MAT -->
      <div class="object mat"
           style="--object-top: 170px; --object-left: 80px;"></div>
      <!-- DISABLED DOOR -->
      <div class="door-way">
        <div class="door"></div>
      </div>
      <!-- CLOSED DOOR -->
      <input type="checkbox" id="stage_5_door" class="door-way-checkbox" />
      <label class="door-way door-way-close" for="stage_5_door">
        <div class="door"></div>
      </label>
      <!-- OPEN DOOR -->
      <label class="door-way door-way-open" for="finish">
        <div class="door"></div>
      </label>
      <!-- FLOOR VASE -->
      <div class="object floor-vase"
           style="--object-top: 130px; --object-left: 55px;"></div>
      <!-- LAMP -->
      <div class="object lamp"
           style="--object-top: 100px; --object-left: 158px;"></div>
      <!-- NAVIGATION -->
      <label class="nav nav-left" for="stage_5_map_3"></label>
    </div>
    <!-- RESET -->
    <input type="reset" class="nav nav-reset" value="" />
    <!-- STAGE LABEL -->
    <div class="stage-label stage-label-5"></div>
  </form>
  <input type="radio" name="stage" id="finish" class="stage-radio" />
  <div class="stage finish" type="reset" value=""></div>
</div>
!

CSS 

              
                :root {
  --width: 240px;
  --height: 240px;
  --door-background-image: url("https://assets.codepen.io/430361/css-room-escape-door.png");
  --door-way-background-image: url("https://assets.codepen.io/430361/css-room-escape-door-way.png");
  --mat-background-image: url("https://assets.codepen.io/430361/css-room-escape-mat.png");
  --key-background-image: url("https://assets.codepen.io/430361/css-room-escape-key.png");
  --front-background-image: url("https://assets.codepen.io/430361/css-room-escape-front.png");
  --instructions-background-image: url("https://assets.codepen.io/430361/css-room-escape-instructions.png");
  --map-background-image: url("https://assets.codepen.io/430361/css-room-escape-map-background.png");
  --navigation-background-image: url("https://assets.codepen.io/430361/css-room-escape-navigation.png");
  --closet-background-image: url("https://assets.codepen.io/430361/css-room-escape-closet.png");
  --closet-door-background-image: url("https://assets.codepen.io/430361/css-room-escape-closet-door.png");
  --stage-label-background-image: url("https://assets.codepen.io/430361/css-room-escape-stage-label.png");
  --frame-background-image: url("https://assets.codepen.io/430361/css-room-escape-frame.png");
  --scissors-background-image: url("https://assets.codepen.io/430361/css-room-escape-scissors.png");
  --window-background-image: url("https://assets.codepen.io/430361/css-room-escape-window.png");
  --window-curtain-background-image: url("https://assets.codepen.io/430361/css-room-escape-window-curtain.png");
  --finish-background-image: url("https://assets.codepen.io/430361/css-room-escape-finish.png");
  --lamp-background-image: url("https://assets.codepen.io/430361/css-room-escape-lamp.png");
  --wall-clock-background-image: url("https://assets.codepen.io/430361/css-room-escape-wall-clock.png");
  --floor-vase-background-image: url("https://assets.codepen.io/430361/css-room-escape-floor-vase.png");
  --flower-vase-background-image: url("https://assets.codepen.io/430361/css-room-escape-flower-vase.png");
  --flower-vase-background-image: url("https://assets.codepen.io/430361/css-room-escape-flower-vase.png");
  --book-shelf-background-image: url("https://assets.codepen.io/430361/css-room-escape-book-shelf.png");
  --conceal-floor-background-image: url("https://assets.codepen.io/430361/css-room-escape-conceal-floor.png");
  --conceal-tree-background-image: url("https://assets.codepen.io/430361/css-room-escape-conceal-tree.png");
  --desk-background-image: url("https://assets.codepen.io/430361/css-room-escape-desk.png");
}

body {
  background-color: #202020;
  width: 100vw;
  height: 100vh;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

body:after {
  width: 0;
  height: 0;
  position: absolute;
  overflow: hidden;
}

.container {
  width: var(--width);
  height: var(--height);
}

.stage-radio {
  display: none;
}

.stage {
  height: var(--height);
  display: none;
  flex-wrap: wrap;
  position: relative;
}

.stage-radio:checked + .stage {
  display: flex;
}

.map-radio {
  display: none;
}

.map {
  background-image: var(--map-background-image);
  width: var(--width);
  height: var(--height);
  display: none;
  position: relative;
}

.map-radio:checked + .map {
  display: block;
}

.object {
  width: var(--object-width);
  height: var(--object-height);
  background-image: var(--object-background-image);
  position: absolute;
  top: var(--object-top);
  left: calc(var(--object-left) + var(--object-move-left));
}

label.object:hover {
  background-position-x: calc(var(--object-width) * -1);
}

.stage-label {
  --stage-label-width: 62px;
  --stage-label-height: 15px;
  background-image: var(--stage-label-background-image);
  width: var(--stage-label-width);
  height: var(--stage-label-height);
  position: absolute;
  top: 10px;
  left: 10px;
}

/****************/ /******************/
/***** DOOR *****/ /***** CLOSET *****/
/****************/ /******************/

.door {
  --door-width: 42px;
  --door-height: 76px;
  background-image: var(--door-background-image);
  width: var(--door-width);
  height: var(--door-height);
  position: absolute;
  left: calc(50% - calc(var(--door-width) / 2));
  bottom: 0;
}

.closet-door {
  --door-width: 30px;
  --door-height: 49px;
  background-image: var(--closet-door-background-image);
  width: var(--door-width);
  height: var(--door-height);
  position: absolute;
  bottom: 7px;
}

.closet-door-left {
  left: 2px;
}

.closet-door-right {
  right: 2px;
  transform: scaleX(-1);
}

.window-curtain {
  --door-width: 77px;
  --door-height: 130px;
  background-image: var(--window-curtain-background-image);
  width: var(--door-width);
  height: var(--door-height);
  position: absolute;
  top: 0;
}

.window-curtain-left {
  left: 8px;
  transform-origin: top left;
}

.window-curtain-right {
  right: 8px;
  transform-origin: top right;
}

.door-way,
.closet,
.window {
  background-image: var(--lockable-background-image);
  width: var(--lockable-width);
  height: var(--lockable-height);
  position: absolute;
  left: var(--lockable-left);
  bottom: var(--lockable-bottom);
}

.door-way {
  --lockable-background-image: var(--door-way-background-image);
  --lockable-width: 50px;
  --lockable-height: 80px;
  --lockable-bottom: 80px;
  --lockable-left: calc(50% - calc(var(--lockable-width) / 2))
}

.closet {
  --lockable-background-image: var(--closet-background-image);
  --lockable-width: 63px;
  --lockable-height: 68px;
  --lockable-bottom: 60px;
  --lockable-left: calc(50% - calc(var(--lockable-width) / 2))
}

.window {
  --lockable-background-image: var(--window-background-image);
  --lockable-width: 170px;
  --lockable-height: 130px;
}

label.door-way-open:hover > .door,
label.closet-open:hover > .closet-door,
label.window-open:hover > .window-curtain {
  background-position-x: calc(var(--door-width) * -1);
}

label.door-way:hover,
label.closet:hover,
label.window:hover {
  background-position-x: calc(var(--lockable-width) * -1);
}

.door-way-open,
.closet-open,
.window-open {
  display: none;
}

.door-way-open > .door {
  transform-origin: top left;
  animation: door-way-open 125ms ease-out forwards;
}

@keyframes door-way-open {
  100% {
    transform: rotateY(45deg) skewY(25deg);
  }
}

.closet-open > .closet-door-left {
  transform-origin: top left;
  animation: closet-open-left 125ms ease-out forwards;
}

@keyframes closet-open-left {
  100% {
    transform: rotateY(135deg) skewY(25deg);
  }
}

.closet-open > .closet-door-right {
  transform-origin: top left;
  animation: closet-open-right 125ms ease-out forwards;
}

@keyframes closet-open-right {
  100% {
    transform: scaleX(-1) translateX(-100%) rotateY(135deg) skewY(25deg);
  }
}

.window-open > .window-curtain {
  animation: window-curtain-open 125ms ease-out forwards;
}

@keyframes window-curtain-open {
  100% {
    transform: scaleX(0.4);
  }
}

.door-way-checkbox,
.closet-checkbox,
.window-checkbox {
  display: none;
}

.door-way-checkbox:checked ~ .door-way-close,
.door-key:checked ~ .map .door-way-checkbox:checked ~ .door-way-close,
.closet-checkbox:checked ~ .closet-close,
.closet-key:checked ~ .map .closet-checkbox:checked ~ .closet-close,
.window-checkbox:checked ~ .window-close,
.window-key:checked ~ .map .window-checkbox:checked ~ .window-close {
  display: none;
}

.door-way-checkbox:checked ~ .door-way-open,
.door-key:checked ~ .map .door-way-checkbox:checked ~ .door-way-open,
.closet-checkbox:checked ~ .closet-open,
.closet-key:checked ~ .map .closet-checkbox:checked ~ .closet-open,
.window-checkbox:checked ~ .window-open,
.window-key:checked ~ .map .window-checkbox:checked ~ .window-open {
  display: block;
}

.door-key:not(:checked) ~ .map label.door-way,
.closet-key:not(:checked) ~ .map label.closet,
.window-key:not(:checked) ~ .map label.window {
  display: none;
}

.door-key:checked ~ .map div.door-way,
.closet-key:checked ~ .map div.closet,
.window-key:checked ~ .map div.window {
  display: none;
}

/***************/
/***** MAT *****/
/***************/

.mat-checkbox {
  display: none;
}

.mat {
  --object-background-image: var(--mat-background-image);
  --object-width: 80px;
  --object-height: 40px;
  --object-move-left: 0px;
  transition: left 125ms ease-out;
}

.mat-checkbox:checked + .mat {
  --object-move-left: 50px;
}

/***************/ /********************/
/***** KEY *****/ /***** SCISSORS *****/
/***************/ /********************/

.key-checkbox {
  display: none;
}

.key {
  --object-background-image: var(--key-background-image);
  --object-width: 12px;
  --object-height: 32px;
  --object-move-left: 0px;
  transition: transform 125ms ease-out;
}

.scissors {
  --object-background-image: var(--scissors-background-image);
  --object-width: 21px;
  --object-height: 30px;
  --object-move-left: 0px;
  transition: transform 125ms ease-out;
}

.door-key:checked ~ .map .door-key-trigger,
.closet-key:checked ~ .map .closet-key-trigger,
.window-key:checked ~ .map .window-key-trigger,
.fake-key:checked ~ .map .fake-key-trigger {
  transform: scale(0);
}

/*****************/
/***** FRAME *****/
/*****************/

.frame-checkbox {
  display: none;
}

.frame {
  --object-background-image: var(--frame-background-image);
  --object-width: 60px;
  --object-height: 55px;
  --object-move-left: 0px;
  transition: transform 125ms ease-out;
  transform-origin: 30px 2px;
}

.frame-checkbox:checked + .frame {
  transform: rotate(60deg);
}

/****************/
/***** LAMP *****/
/****************/

.lamp {
  --object-background-image: var(--lamp-background-image);
  --object-width: 31px;
  --object-height: 90px;
  --object-move-left: 0px;
}

/**********************/
/***** WALL CLOCK *****/
/**********************/

.wall-clock {
  --object-background-image: var(--wall-clock-background-image);
  --object-width: 35px;
  --object-height: 35px;
  --object-move-left: 0px;
}

/**********************/
/***** FLOOR VASE *****/
/**********************/

.floor-vase {
  --object-background-image: var(--floor-vase-background-image);
  --object-width: 24px;
  --object-height: 50px;
  --object-move-left: 0px;
}

/***********************/
/***** FLOWER VASE *****/
/***********************/

.flower-vase {
  --object-background-image: var(--flower-vase-background-image);
  --object-width: 12px;
  --object-height: 50px;
  --object-move-left: 0px;
}

/***********************/
/***** FLOWER VASE *****/
/***********************/

.book-shelf {
  --object-background-image: var(--book-shelf-background-image);
  --object-width: 55px;
  --object-height: 75px;
  --object-move-left: 0px;
}

/*************************/
/***** CONCEAL FLOOR *****/
/*************************/

.conceal-floor {
  --object-background-image: var(--conceal-floor-background-image);
  --object-width: 21px;
  --object-height: 30px;
  --object-move-left: 0px;
  transition: left 125ms ease-out;
}

.conceal-floor-checkbox:checked + .conceal-floor {
  --object-move-left: 21px;
}

.conceal-floor-checkbox {
  display: none;
}

/************************/
/***** CONCEAL TREE *****/
/************************/

.conceal-tree {
  --object-background-image: var(--conceal-tree-background-image);
  --object-width: 12px;
  --object-height: 32px;
  --object-move-left: 0px;
  transition: left 125ms ease-out;
}

.conceal-tree-checkbox:checked + .conceal-tree {
  --object-move-left: 21px;
}

.conceal-tree-checkbox {
  display: none;
}

/****************/
/***** DESK *****/
/****************/

.desk {
  --object-background-image: var(--desk-background-image);
  --object-width: 71px;
  --object-height: 67px;
  --object-move-left: 0px;
}

/***********************/
/***** NAVIGATION *****/
/***********************/
.nav {
  --navigation-width: 29px;
  --navigation-height: 29px;
  --navigation-spacing: 5px;
  background-image: var(--navigation-background-image);
  width: var(--navigation-width);
  height: var(--navigation-height);
  position: absolute;
  top: calc(50% - calc(var(--navigation-height) / 2));
}

.nav-left {
  left: var(--navigation-spacing);
}

.nav-right {
  background-position-y: calc(var(--navigation-height) * -1);
  right: var(--navigation-spacing);
}

.nav-reset {
  background-color: transparent;
  background-position-y: calc(var(--navigation-height) * -2);
  padding: 0;
  border: 0;
  margin: 0;
  outline: 0;
  top: var(--navigation-spacing);
  right: var(--navigation-spacing);
}

.nav-left:hover,
.nav-right:hover,
.nav-reset:hover {
  background-position-x: calc(var(--navigation-width) * -1);
}

/***********************/
/***** STAGE IMAGE *****/
/***********************/

.front {
  background-image: var(--front-background-image);
}

.instructions {
  background-image: var(--instructions-background-image);
}

.finish {
  background-image: var(--finish-background-image);
}

/* STAGE 1 */

.stage-1-map-1 {
  background-position-x: 0px;
}

/* STAGE 2 */

.stage-label-2 {
  background-position-y: calc(var(--stage-label-height) * -1);
}

.stage-2-map-1 {
  background-position-x: 0px;
}

/* STAGE 3 */

.stage-label-3 {
  background-position-y: calc(var(--stage-label-height) * -2);
}

.stage-3-map-1 {
  background-position-x: calc(var(--width) * -1);
}

.stage-3-map-2 {
  background-position-x: calc(var(--width) * -3);
}

/* STAGE 4 */

.stage-label-4 {
  background-position-y: calc(var(--stage-label-height) * -3);
}

.stage-4-map-1 {
  background-position-x: calc(var(--width) * -1);
}

.stage-4-map-2 {
  background-position-x: calc(var(--width) * -2);
}

.stage-4-map-3 {
  background-position-x: calc(var(--width) * -3);
}

/* STAGE 5 */

.stage-label-5 {
  background-position-y: calc(var(--stage-label-height) * -4);
}

.stage-5-map-1 {
  background-position-x: calc(var(--width) * -1);
}

.stage-5-map-2 {
  background-position-x: calc(var(--width) * -2);
}

.stage-5-map-3 {
  background-position-x: calc(var(--width) * -3);
}

.stage-5-map-4 {
  background-position-x: calc(var(--width) * -0);
}
!

JS 

              
                // No javascript
!
999px

Console