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CSS Base

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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.

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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.

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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

    <meta name="viewport" content="width=device-width, initial-scale=1">
      Thick Lines: Sundown

    <div class="sun"></div>
    <div class="ground"></div>

              * {
  margin: 0;
  padding: 0;

body {
  background-color: hsl(20, 85%, 18%);
  height: 100vh;
  overflow: hidden;
  position: relative;

// Generate a stepped gradient based on the colours we send it.
// This gives us a list of values we send to the ‘box-shadow’ property
// of the element of our choice. ‘$shadow-colors...’ creates a list
// of arbitrary length based on the remaining arguments we send.

@function get-shadows($step-width, $shadow-colors...) {

  // List of shadows needs to be initialized outside the loop
  $shadow-list: ();

  // Loop over the arglist
  @each $color in $shadow-colors {

    // It’s handy to stash this in a var
    $index: index($shadow-colors, $color);

    // We’re stacking shadows here, so we multiply the desired width
    // of the step by the current index to get the ‘spread’ value
    // for our rule
    $spread: $step-width * $index;

    // Generate the rule for this shadow
    $shadow: 0 0 0 $spread $color;

    // Append the rule to the list and add a comma if it’s not the last one
    @if $index != length($shadow-colors) {
      $shadow-list: append($shadow-list, $shadow, 'comma');
    } @else {
      $shadow-list: append($shadow-list, $shadow);

  // Return the finished list for ‘box-shadow’ to consume down there
  @return $shadow-list;


$sun-radius: 15vh;

.sun {
  background-color: hsl(42, 98%, 53%);
  border-radius: $sun-radius;
  box-shadow: get-shadows(
    hsl(35, 95%, 54%),
    hsl(25, 91%, 54%),
    hsl(16, 88%, 54%),
    hsl(14, 84%, 34%)
  height: $sun-radius * 2;
  position: absolute;
  bottom: 3vh;

  // 50% from the left, then back it up by half the sun’s width
  left: calc(50% - #{$sun-radius});

  width: $sun-radius * 2;
  z-index: -1;

.ground {
  background-color: hsl(14, 84%, 34%);
  height: 18vh;
  position: absolute;
  bottom: 0;
  width: 100%;

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