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 

              
                  <header>
    <h3>Example Vanilla Form</h3>
    <p>With just the import from Open Props, no additional classes, have great looking forms.</p>
  </header>
  <form>
    <fieldset id="forms__input">
      <div> 
        <label for="input__name">Text Input</label>
        <input id="input__name" name="name" type="text" placeholder="lorem">
      </div>
      <div> 
        <label for="required__input__name">Required Text Input</label>
        <input id="required__input__name" name="name" type="text" required placeholder="ipsum">
      </div>
      <div>
        <label for="input__password">Password</label>
        <input id="input__password" type="password" autocomplete="new-password" placeholder="················">
      </div>
      <div>
        <label for="input__webaddress">Web Address</label>
        <input id="input__webaddress" type="url" placeholder="https://yoursite.com" autocomplete="url">
      </div>
      <div>
        <label for="input__emailaddress">Email Address</label>
        <input id="input__emailaddress" type="email" placeholder="name@email.com" autocomplete="email">
      </div>
      <div>
        <label for="input__search">Search</label>
        <input id="input__search" type="search" placeholder="Search for flavors" list="searches">
        <datalist id="searches">
          <option value="Chocolate">
          <option value="Vanilla">
          <option value="Strawberry">
        </datalist>
      </div>
      <div>
        <label for="input__phone">Phone Number</label>
        <input id="input__phone" type="tel" inputmode="numeric" placeholder="999-999-9999" minlength="7" maxlength="12" pattern="[0-9]{3}-[0-9]{3}-[0-9]{4}">
      </div>
      <div>
        <label for="input__text2">Number Input</label>
        <input id="input__text2" type="number" placeholder="0-100" min="0" max="100">
      </div>
      <div>
        <label for="input__readonly">Read only</label>
        <input readonly id="input__readonly" type="text" value="Nope!">
      </div>
      <div>
        <label for="input__disabled">Disabled</label>
        <input disabled id="input__disabled" type="text" value="Nope!">
      </div>
      <footer>
        <menu>
          <button type="reset">Reset</button>
        </menu>
        <menu>
          <button type="button">Cancel</button>
          <button>Submit</button>
        </menu>
      </footer>
      <legend>Input fields</legend>
    </fieldset>
  </form>
  <form>
    <fieldset id="forms__select">
      <div>
        <label for="select">Pick an option</label>
        <select id="select">
          <optgroup label="Option Group">
            <option>Option One</option>
            <option>Option Two</option>
            <option>Option Three</option>
          </optgroup>
        </select>
      </div>
      <legend>Select menus</legend>
    </fieldset>
  </form>
  <fieldset id="forms__checkbox">
    <legend>Checkboxes</legend>
    <ul class="list list--bare">
      <li><label for="checkbox1"><input id="checkbox1" name="checkbox" type="checkbox" checked="checked"> Choice A</label></li>
      <li><label for="checkbox2"><input id="checkbox2" name="checkbox" type="checkbox"> Choice B, something long enough to become multiline</label></li>
      <li><label for="checkbox3"><input id="checkbox3" name="checkbox" type="checkbox"> Choice C</label></li>
    </ul>
  </fieldset>
  <fieldset id="forms__radio">
    <legend>Radio buttons</legend>
    <ul class="list list--bare">
      <li><label for="radio1"><input id="radio1" name="radio" type="radio" class="radio" checked="checked"> Option 1</label></li>
      <li><label for="radio2"><input id="radio2" name="radio" type="radio" class="radio"> Option 2, something long enough to become multiline</label></li>
      <li><label for="radio3"><input id="radio3" name="radio" type="radio" class="radio"> Option 3</label></li>
    </ul>
  </fieldset>
  <fieldset id="forms__textareas">
    <legend>Textareas</legend>
    <textarea id="textarea" rows="8" cols="48" placeholder="Enter your message here"></textarea>
    <footer>
      <menu>
        <button type="reset">Clear</button>
      </menu>
      <menu>
        <button type="button">Cancel</button>
        <button type="submit">Send</button>
      </menu>
    </footer>
  </fieldset>
  
  <fieldset id="forms__alone-fieldset">
    <legend>Single</legend>
    <label for="list__autocomplete">Text autocomplete</label>
    <input type="text" id="list__autocomplete" list="searches">
  </fieldset>
  
  <form id="login"> 
    <fieldset id="signin__example">
      <legend>Sign In</legend>
      <div> 
        <label for="input__username">Username</label>
        <input id="input__username" name="username" type="text" required autocomplete="username" placeholder="mcgyver" pattern="^[a-zA-Z][a-zA-Z0-9-_\.]{1,20}$">
      </div>
      <div>
        <label for="input__password2">Password</label>
        <input id="input__password2" type="password" autocomplete="current-password" required placeholder="········" pattern="^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$" title="Uppercase, lowercase and a number are required">
      </div>
      <footer>
        <menu>
          <button>Login</button>
          <button type="reset">Clear</button>
        </menu>
      </footer>
    </fieldset>
  </form>

  <fieldset>
    <legend>Search</legend>
    <section>
      <search>
        <form>
          <label for="movie">Find a Movie</label>
          <input type="search" id="movie">
          <button type="submit">Search</button>
        </form>
      </search>
    </section>
  </fieldset>

<form action="#" method="post">
  <fieldset>
    <legend>Payment</legend>
    <div>
      <label for="cc-name">Name on card</label>
      <input id="cc-name" name="cc-name" autocomplete="cc-name" maxlength="50" pattern="[\p{L} \-\.]+" placeholder="Full name" required>
      
      <label for="cc-number">Card number</label>
      <input id="cc-number" name="cc-number" autocomplete="cc-number" inputmode="numeric" maxlength="50" pattern="[\d ]{10,30}" placeholder="0000 0000 0000 0000" required>
        
      <label for="cc-exp">Expiry date</label>
      <input id="cc-exp" name="cc-exp" autocomplete="cc-exp" placeholder="MM/YY" maxlength="5" required style="max-inline-size: 9ch">

      <label for="cc-csc">Security code</label>
      <input id="cc-csc" name="cc-csc" inputmode="numeric" maxlength="3" placeholder="xxx" required style="max-inline-size: 6ch">
    </div>
      
    <footer>
      <menu>
        <button type="reset">Reset</button>
      </menu>
      <menu>
        <button type="submit">Pay</button>
      </menu>
    </footer>
  </fieldset>
</form>
  
  <fieldset id="forms__html5">
    <legend>Inputs Extended</legend>
    <div>
      <label for="file-in">File input</label>
      <input type="file" id="file-in" ondragenter="this.classList.add('dropping')" ondragleave="this.classList.remove('dropping')" ondrop="this.classList.remove('dropping')">
    </div>
    <div>
      <label for="ic">Color input</label>
      <input type="color" id="ic" value="#5c7cfa">
    </div>
    <div>
      <label for="ir">Range input</label>
      <input type="range" id="ir" value="10" oninput="rangeToPercent(this)" style="--track-fill: 10%">
    </div>
    <div>
      <label for="ir">Progress element</label>
      <div>
        <progress></progress>
        <progress value=".5">50%</progress>
      </div>
    </div>
    <div>
      <label for="idd">Date input</label>
      <input type="date" id="idd" value="1970-01-01">
    </div>
    <div>
      <label for="idm">Month input</label>
      <input type="month" id="idm" value="1970-01">
    </div>
    <div>
      <label for="idw">Week input</label>
      <input type="week" id="idw" value="1970-W01">
    </div>
    <div>
      <label for="idtl">Datetime-local input</label>
      <input type="datetime-local" id="idtl" value="1970-01-01T00:00">
    </div>
  </fieldset>
</form>
!

CSS 

              
                @use postcss-nested;
@import "https://unpkg.com/open-props";
@import "https://unpkg.com/open-props/normalize.min.css";
@import "https://unpkg.com/open-props/buttons.min.css";

/* 
todo:
  - match button hover effects to checkbox/radio?
  - filter on radios
  - support label wrapped inputs
  - safari file upload button label spacing
  - radio inputs should have round focus ring
  - switch to :user-invalid
  - required red dot change to green when input is fulfilled
  - adaptive icon color
  - less dependencies on <fieldset>
*/

:root {
  /* https://github.com/argyleink/open-props/discussions/65 ?? */
  --icon-error: url(https://api.iconify.design/ic:baseline-error.svg?color=%23ff6b6b);
  --icon-search: url(https://api.iconify.design/ic:search.svg?color=%2300000077);
  --icon-email: url(https://api.iconify.design/ic:email.svg?color=%2300000077);
  --icon-url: url(https://api.iconify.design/ic:link.svg?color=%2300000077);
  --icon-user: url(https://api.iconify.design/ic:person.svg?color=%2300000077);
  --icon-user-editing: url(https://api.iconify.design/ic:person-outline.svg?color=%2300000077);
  --icon-tel: url(https://api.iconify.design/ic:phone.svg?color=%2300000077);
  --icon-tel-editing: url(https://api.iconify.design/ic:phone-in-talk.svg?color=%2300000077);
  --icon-password: url(https://api.iconify.design/ic:baseline-lock.svg?color=%2300000077);
  --icon-password-editing: url(https://api.iconify.design/ic:baseline-lock-open.svg?color=%2300000077);
  --icon-no-edit: url(https://api.iconify.design/ic:baseline-edit-off.svg?color=%2300000077);
  --icon-arrow-down: url(https://api.iconify.design/ic:keyboard-arrow-down.svg?color=%2300000077);
  --icon-arrow-up: url(https://api.iconify.design/ic:keyboard-arrow-up.svg?color=%2300000077);
  
  @media (prefers-color-scheme: dark) {
    --icon-error: url(https://api.iconify.design/ic:baseline-error.svg?color=%23ff6b6b);
    --icon-search: url(https://api.iconify.design/ic:search.svg?color=%23ffffff77);
    --icon-email: url(https://api.iconify.design/ic:email.svg?color=%23ffffff77);
    --icon-url: url(https://api.iconify.design/ic:link.svg?color=%23ffffff77);
    --icon-user: url(https://api.iconify.design/ic:person.svg?color=%23ffffff77);
    --icon-user-editing: url(https://api.iconify.design/ic:person-outline.svg?color=%23ffffff77);
    --icon-tel: url(https://api.iconify.design/ic:phone.svg?color=%23ffffff77);
    --icon-tel-editing: url(https://api.iconify.design/ic:phone-in-talk.svg?color=%23ffffff77);
    --icon-password: url(https://api.iconify.design/ic:baseline-lock.svg?color=%23ffffff77);
    --icon-password-editing: url(https://api.iconify.design/ic:baseline-lock-open.svg?color=%23ffffff77);
    --icon-no-edit: url(https://api.iconify.design/ic:baseline-edit-off.svg?color=%23ffffff77);
    --icon-arrow-down: url(https://api.iconify.design/ic:keyboard-arrow-down.svg?color=%23ffffff77);
    --icon-arrow-up: url(https://api.iconify.design/ic:keyboard-arrow-up.svg?color=%23ffffff77);
  }
}

body::after {
  content: var(--icon-tel-editing) var(--icon-password-editing) var(--icon-user-editing) var(--icon-arrow-up);
  opacity: 0;
  position: absolute;
  z-index: -1;
}

fieldset {
  counter-reset: errors;
  border-color: var(--surface-2);
  box-shadow: var(--shadow-3);
  padding-inline: var(--size-4);
  padding-block: var(--size-2) var(--size-3);
  transition: box-shadow .4s var(--ease-out-4);
  
  &:focus-within {
    box-shadow: var(--shadow-6);
  }
  
  &:focus-within > legend {
    color: var(--link);
  }
  
  & > div:has(:placeholder-shown:required, :not(:placeholder-shown):invalid, :not([placeholder]):required) > label {
    position: relative;
    
    &::after {
      content: "required";
      position: absolute;
      margin-block-start: .5ex;
      margin-inline-start: 1ex;
      text-indent: -200vw;
      inline-size: 6px;
      block-size: 6px;
      border-radius:  var(--radius-round);
      background-color: var(--red-4);
      box-shadow: 0 0 var(--size-2) var(--red-4);
/*       animation: var(--animation-ping); */
    }
  }
   
  &:has(:not(:placeholder-shown):invalid) legend::after {
    text-transform: initial;
		color: var(--red-5);
		content: " (" counter(errors) " errors)";
	}
  
  &:has(:not(:placeholder-shown):invalid) {
		counter-increment: errors;
	}
}

legend {
  display: inline-flex;
  gap: var(--size-2);
  align-items: center;
  min-block-size: 3ch; 
  border: 1px solid var(--surface-2);
  padding-inline: 1.5ch;
  border-radius: var(--radius-round);
  text-transform: uppercase;
  letter-spacing: var(--font-letterspacing-3);
  font-size: var(--font-size-0);
  
  @media (prefers-color-scheme: light) {
    background: white;
  }
}

:where(input:not(
  button,
  [type="button"], 
  [type="file"], 
  [type="number"],
  [type="range"],
  [type="color"],
  [type="checkbox"],
  [type="radio"]
)) {
  /* todo: touch-callout */
  line-height: 2.5;
  padding-block: 0;
  padding-inline: 1.75ch;
  transition: 
    background-color .5s var(--ease-3),
    outline-offset 145ms var(--ease-2);
  
  :placeholder-shown {
    text-overflow: ellipsis;
  }
  
  @media (prefers-reduced-motion: no-preference) {
  &:not(:placeholder-shown):invalid:not(:focus) {
      animation: var(--animation-shake-x);
      animation-duration: .4s;
    }
  }
}

:where(input:not(
  button, 
  input[type="button"], 
  input[type="range"],
  input[type="color"],
  input[type="checkbox"],
  input[type="radio"]
), textarea) {
  box-shadow: var(--shadow-2), 0 0 1px 1px var(--surface-2);
  
  @media (prefers-color-scheme: dark) {
    box-shadow: 
      var(--inner-shadow-2), 
      0 1px 0px 0px var(--dark-surface) inset,
      0 -.5px 0px 0px var(--surface-2) inset;
  }
}

input:is(
/*  [type=text], */
 [type=password],
 [type=url],
 [type=email],
 [type=tel]
) {
  padding-inline-end: 3.5ch;
}

input:is(
 [type=text],
 [type=password],
 [type=url],
 [type=email],
 [type=tel],
 [type=search]
) {
  flex-shrink: 1;
  min-inline-size: 5ch;
  max-inline-size: 100%;
}

input, textarea {
  --dark-surface: var(--gray-11);
}

[readonly]:focus {
  outline: none;
}

input:not(
  button, 
  [disabled], 
  [readonly], 
  [type="file"], 
  [type="button"], 
  [type="submit"], 
  [type="reset"],
  [type="checkbox"],
  [type="radio"]), 
  textarea, 
  select {
  color: var(--text-1);
  
  @media (prefers-color-scheme: light) {
    background-color: white;
  }
  
  &:is(:hover, :focus-within) {
    @media (prefers-color-scheme: dark) {
      background-color: var(--dark-surface);
    }
  }

  &:not(:placeholder-shown, :not([placeholder])):invalid {
    background-image: var(--icon-error);
    background-position: calc(100% - 1.5ch) center;
  }
    
  &:not(:focus-within):not(:placeholder-shown):invalid {
    text-decoration: underline wavy var(--red-6);

    @media (prefers-color-scheme: dark) {
      text-decoration: underline wavy var(--red-4);
    }
  }
}

input[readonly],
input[disabled] {
  cursor: not-allowed;
}

[disabled] {
  opacity: .5;
  box-shadow: none;
  cursor: auto;
}

@keyframes drop-zone {
  from { box-shadow: 0 0 0 0 var(--link) }
  to   { box-shadow: 0 0 0 25px #0000 }
}

input[type="file"] {
  /*  find and remove this from normalize  */
  border: none;
  
  @media (prefers-color-scheme: light) {
    box-shadow: none; 
  }
  
  &.dropping {
    outline: 2px dashed var(--link);
    
    @media (prefers-reduced-motion: no-preference) {
      animation: drop-zone 1.5s var(--ease-out-5) infinite;
    }
  }
}

:where(input[type=file])::-webkit-file-upload-button, :where(input[type=file])::file-selector-button {
  margin: var(--size-3);
}

@media (prefers-color-scheme: dark) {
  :where(input[type=file])::-webkit-file-upload-button,   
  :where(input[type=file])::file-selector-button {
    border-color: transparent;
  }
}

input[type="number"] {
  padding-block: .75ch;
  padding-inline: 1.75ch .75ch;
  min-inline-size: 10ch;
}

input[type="search"] {
  background-image: var(--icon-search);
  background-position: 1.5ch center;
  padding-inline: 4ch 1.25ch;
  border-radius: var(--radius-round);
  
  &::-webkit-search-cancel-button {
    margin-right: -5px;
    padding: .1ch;
  }
  
  &[list]:placeholder-shown {
    background-image: 
      var(--icon-search),
      var(--icon-arrow-down);
    background-position: 1.5ch center, calc(100% - 1.25ch) center;
    background-size: auto, 2.25ch;
    
    &:focus {
      background-image: 
        var(--icon-search),
        var(--icon-arrow-up);
    }
  }
  
  &::-webkit-calendar-picker-indicator {
    color: transparent;
  }
}

input[type="text"][list] {
  background-image: var(--icon-arrow-down);
  background-position: calc(100% - 1.25ch) center;
  background-size: 2.25ch;
  
  &:focus {
    background-image: var(--icon-arrow-up);
  }
  
  &::-webkit-calendar-picker-indicator {
    color: transparent;
  }
}

input[type="password"] {
  background-image: var(--icon-password);
  background-position: calc(100% - 1.5ch) center;
  
  &:focus {
    background-image: var(--icon-password-editing);
  }
}

input[type="email"] {
  background-image: var(--icon-email);
  background-position: calc(100% - 1.5ch) center;
}

input[readonly] {
  background-image: var(--icon-no-edit);
  background-position: calc(100% - 1.5ch) center;
}

input[type="url"] {
  background-image: var(--icon-url);
  background-position: calc(100% - 1.5ch) center;
}

input[type="tel"] {
  background-image: var(--icon-tel);
  background-position: calc(100% - 1.5ch) center;
  
  &:focus {
    background-image: var(--icon-tel-editing);
  }
}

input:where([name*="username"],[id*="username"]) {
  background-image: var(--icon-user);
  background-position: calc(100% - 1.5ch) center;
  background-size: 1.75ch;
  
  &:focus {
    background-image: var(--icon-user-editing);
  }
}

input[type="color"] {
  appearance: none;
  background: none;
  border: none;
  padding: 0;
  inline-size: var(--size-8);
  block-size: var(--size-8);
  border-radius: var(--radius-round);
  overflow: hidden;
  box-shadow: var(--shadow-5);
  
  &::-webkit-color-swatch {
    border: none;
  }
  
  &::-webkit-color-swatch-wrapper {
    padding: 0;
  }
}

textarea {
  transition: background-color .5s var(--ease-3);
}

select {
  /*  todo: share more with buttons or use a .btn class  */
  --_bg-light: #fff;
  --_bg-dark: var(--surface-3);
  --_bg: var(--_bg-light);
  background-color: var(--_bg);
  box-shadow: var(--shadow-3), 0 1px var(--surface-3);
  
  appearance: none;
  background-image: var(--icon-arrow-down);
  background-position: calc(100% - 1ch) center;
  background-size: 3ex;
  padding-block: 0.75ch;
  padding-inline: 1.75ch 3ch;
  line-height: 1.5;
  
  &:is(:hover,:focus) {
    /* add button hover */
    background-color: var(--_bg);
  }
  
  &:is(:hover, :focus) {
    background-image: var(--icon-arrow-up);
  }
  
  @media (prefers-color-scheme: dark) {
    --_bg: var(--_bg-dark);
  }
}

/* todo: ship unprefixed as well */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus {
  /* todo: add checkmark icon */
  -webkit-text-fill-color: var(--text-1);
  -webkit-box-shadow: 0 0 0px 1e5px var(--gray-11) inset;
  transition: background-color 5000s ease-in-out 0s;
}

::placeholder {
  color: var(--text-2);
  font-style: italic;
  
  @media (prefers-color-scheme: dark) {
    color: var(--surface-4);
  }
}

::-moz-placeholder {
  opacity: 1;
}

fieldset, form > header {
  display: grid;
  gap: var(--size-2);
}

form {
  display: grid;
  gap: var(--size-8);
}

legend {
  margin-inline-start: -2px;
  color: var(--text-2);
  font-weight: var(--font-weight-6);
}

fieldset {
  gap: var(--size-3);
  max-inline-size: max-content;
  
  @media (width > 720px) {
    gap: var(--size-2);
  }
  
  & > div {
    display: grid;
    grid-auto-columns: 1fr;
    gap: var(--size-2) var(--size-3);
    align-items: center;
    
    @media (width > 720px) {
      grid-template-columns: var(--size-content-1) auto;
    }
    
    & > label {
      justify-self: start;
    }
  }
  
  & > footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--size-3);
    margin-block-start: var(--size-6);
    
    & > menu:only-child {
      margin-inline-start: auto;
    }
  }
  
  & > ul {
    padding: 0;
    margin: 0;
    list-style-type: none;
    display: grid;
    gap: var(--size-2);
    
    & > li {
      padding: 0;
      
      & > label {
        display: inline-flex;
        align-items: baseline;
        gap: var(--size-4);
        max-inline-size: var(--size-content-1);
        
        & > input {
          margin-inline-start: 0;
          flex-shrink: 0;
        }
      }
    }
  }
}

search {
  & > form {
    gap: var(--size-3);
    grid-template-columns: minmax(20ch, 1fr) auto;
    
    & > label {
      grid-column: span 2;
    }
  }
}

:where(
  input[type="checkbox"],
  input[type="radio"]
) {
  aspect-ratio: 1;
  box-shadow: var(--shadow-6);
  transform-style: preserve-3d;
  cursor: pointer;
  
  --isLTR: 1;
  --isRTL: -1;
  
  &:dir(rtl) {
    --isLTR: -1;
    --isRTL: 1;
  }

  &:hover::before {
    --thumb-scale: 1;
  }

  @media (hover: none) {
    inline-size: 1.5rem;
    block-size: 1.5rem;
  }

  &::before {
    --thumb-scale: .01;
    --thumb-highlight-size: 225%;

    content: "";
    inline-size: var(--thumb-highlight-size);
    block-size: var(--thumb-highlight-size);
    clip-path: circle(50%);
    position: absolute;
    inset-block-start: 50%;
    inset-inline-start: 50%;
    background: hsl(0 0% 50% / 20%);
    transform-origin: center center;
    transform: 
      translateX(calc(var(--isRTL) * 50%)) 
      translateY(-50%) 
      translateZ(-1px) 
      scale(var(--thumb-scale))
    ;
    will-change: transform;

    @media (prefers-reduced-motion: no-preference) {
      transition: transform .2s ease;
    }
  }
}

input[type="range"] {
  --track-height: .5ex;
  --track-fill: 0%;
/*   --_track-fill: calc(100% * attr(value number, 0) / attr(max number, 100)); */
  --track-color: var(--dark-surface);
  --thumb-size: 3ex;
  --thumb-offset: -1.25ex;
  --thumb-highlight-color: lch(100 0 0 / 20%);
  --thumb-highlight-size: 0px;
  
  @media (prefers-color-scheme: light) {
    --thumb-highlight-color: lch(0 0 0 / 20%);
    --track-color: var(--surface-2);
  }

  display: block;
  inline-size: 100%;
  margin: 1ex 0;
  appearance: none;
  background: transparent;
  outline-offset: 5px;

  @media (hover: none) {
    & {
      --thumb-size: 30px;
      --thumb-offset: -14px;
    }
  }

  &::-webkit-slider-runnable-track {
    appearance: none;
    block-size: var(--track-height);
    border-radius: 5ex;
    box-shadow: var(--inner-shadow-2);
    background: 
      linear-gradient(
        to right, 
        transparent var(--track-fill), 
        var(--track-color) 0%
      ),
      var(--link);
  }

  &::-moz-range-track {
    appearance: none;
    block-size: var(--track-height);
    border-radius: 5ex;
    box-shadow: var(--inner-shadow-2);
    background: 
      linear-gradient(
        to right, 
        transparent var(--track-fill), 
        var(--track-color) 0%
      ),
      var(--link);
  }

  &::-webkit-slider-thumb {
    appearance: none;
    cursor: ew-resize;
    border: 3px solid var(--surface-1);
    block-size: var(--thumb-size);
    inline-size: var(--thumb-size);
    margin-block-start: var(--thumb-offset);
    border-radius: 50%;
    background: var(--link);
    box-shadow: 0 0 0 var(--thumb-highlight-size) var(--thumb-highlight-color);
    
    @media (prefers-reduced-motion: no-preference) {
      & {
        transition: box-shadow .1s ease;
      }
    }

    @nest .fieldset-item:focus-within & {
      border-color: var(--surface-2);
    }
  }

  &::-moz-range-thumb {
    appearance: none;
    cursor: ew-resize;
    border: 3px solid var(--surface-1);
    block-size: var(--thumb-size);
    inline-size: var(--thumb-size);
    margin-block-start: var(--thumb-offset);
    border-radius: 50%;
    background: var(--link);
    box-shadow: 0 0 0 var(--thumb-highlight-size) var(--thumb-highlight-color);

    @media (prefers-reduced-motion: no-preference) {
      & {
        transition: box-shadow .1s ease;
      }
    }

    @nest .fieldset-item:focus-within & {
      border-color: var(--surface-2);
    }
  }

  &:is(:hover,:active) {
    --thumb-highlight-size: 10px;
  }
}

@media (pointer: coarse) {
  input[type="checkbox"],
  input[type="radio"]{
    inline-size: var(--size-4);
    block-size: var(--size-4);
  }
}








body {
  display: grid;
  place-content: center;
  padding: var(--size-5);
  gap: var(--size-7);
}

.buttons-list {
  display: flex;
  gap: var(--size-3);
}
 
#signin__example {
  gap: var(--size-4);
  
  & > div {
    grid-template-columns: 1fr;
    gap: var(--size-2);
  }
  
  & > footer {
    margin-block-start: var(--size-2);
    
    & > menu {
      flex-direction: row-reverse;
    }
  }
}
!

JS 

              
                const rangeToPercent = range => {
  const max = range.getAttribute('max') || 100
  const percent = range.value / max * 100

  range.style.setProperty('--track-fill', `${parseInt(percent)}%`)
}
!
999px

Console