Kotlin docs dark theme

Forked from https://userstyles.org/styles/145525/kotlin-site-dark-design-v2017-2
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// ==UserScript==
// @name         Kotlin docs dark theme
// @namespace    https://greasyfork.org/en/users/10848-sergio91pt
// @version      1.0.1
// @description  Forked from https://userstyles.org/styles/145525/kotlin-site-dark-design-v2017-2
// @author       sergio91pt
// @match        https://kotlinlang.org/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.querySelectorAll('.sample').forEach(node => {
        node.setAttribute('theme', 'darcula');
    });

    const css = `
/*home page tiles*/
  .kotlin-overview-section._get-kotlin .get-kotlin-options-list .option-item,
  .kotlin-overview-section._testimonials .testimonial,
  .kotlin-overview-section._features .kotlin-features-list .kotlin-feature
  {
    background-color: #222;
  }

  .kotlin-overview-section._features, .kotlin-overview-section._testimonials
  {
    background-color: #333;
    background-image: none;
  }

  .kotlin-overview-section._features .kotlin-features-list .feature-description
  {
    color: #B7D6F5;
  }

  .kotlin-overview-section._features .kotlin-features-list .feature-example-link
  {
    color: #87A7CD;
  }

  .kotlin-overview-section._features .kotlin-features-list .feature-example-link:hover
  {
    color: #EEE;
  }

/*main body*/
  body
  {
    color: #EEE;
    background-color: #222;
  }

/*API declarations*/
  .page-content .declarations
  {
    background: #313335;
  }

  .page-content .declarations a
  {
    color: #87A7CD !important;
  }

/*keywords in the body*/
  .page-content .keyword
  {
    color: #CC7832;
  }
/*code expressions in the body*/
  .page-content li>code,
  .page-content p>code
  {
    color: #A9D7E6;
    background-color: #2B2B2B;
  }

  .page-content table td, .page-content table th
  {
    background-color: #2B2B2B;
  }

  .page-content blockquote,
  .page-content blockquote.note
  {
    background-color: #2B2B2B;
  }

/*navigation buttons*/
  .docs-nav .nav-item-text
  {
    color: #B7D6F5;
    background-color: #252525;
    border-color: #EEE;
  }

/*selected navigation button*/
  .docs-nav .nav-item.is_active .nav-item-text
  {
    color: #252525;
    background-color: #EEF;
    border-color: #EEE;
  }
/*triangle under navigation button*/
  .docs-nav .nav-item-text:after
  {
    border-top-color: #EEF;
  }

  .docs-nav .nav-item-text:before
  {
    border-top-color: #EEE;
  }

/*navigation panel on the left*/
  .tree-branch-title
  {
    background-color: #222;
    color: #B7D6F5;
  }

  .tree-branch-title:hover
  {
    background-color: #222;
    color: #FFF;
  }

  .tree-branch-title.is_active
  {
    background-color: #222;
    color: #B7D6F5;
  }

  .tree-branch-title.is_active:hover
  {
    background-color: #222;
    color: #FFF;
  }

  .tree-branch._opened
  {
    background-color: #252525;
  }

  .tree-leaf-title.is_active
  {
    color: #EEE;
  }

  .tree-branch.js-item.js-branch._opened  a,
  a
  {
    color: #87A7CD;
  }

  .tree-branch.js-item.js-branch._opened  a:hover,
  a:hover
  {
    color: #EEE;
  }

/*code blocks*/
  .page-content .code._highlighted,
.page-content .code._highlighted span.cm-def, .cm-s-default .cm-def,
.page-content .code._highlighted span.cm-variable, .cm-s-default .cm-variable,
.page-content .code._highlighted span.cm-variable-2, .cm-s-default .cm-variable-2,
.page-content .code._highlighted span.cm-variable-3, .cm-s-default .cm-variable-3,
.page-content .code._highlighted span.cm-operator, .cm-s-default .cm-operator,
.page-content .code._highlighted span.cm-property, .cm-s-default .cm-property
.page-content .code._highlighted span.cm-qualifier,
.page-content .signature
  {
    color: #A9B7C6;
    background: #2B2B2B;
  }

  .page-content .code._highlighted span.cm-keyword, .cm-s-default .cm-keyword
  {
    color: #CB772F;
  }

  .page-content .code._highlighted span.cm-string, .cm-s-default .cm-string
  {
    color: #A5C25C;
  }

  .page-content .code._highlighted span.cm-comment, .cm-s-default .cm-comment
  {
    color: #808080;
  }

  .page-content .code._highlighted span.cm-number, .cm-s-default .cm-number
  {
    color: #6897BB;
  }

  .page-content .code._highlighted span.cm-atom, .cm-s-default .cm-atom
  {
    color: #9876AA;
  }

  .page-content .code._highlighted span.cm-tag
  {
    color: #E8BF6A;
  }

  .page-content .code._highlighted span.cm-attribute
  {
    color: #BABABA;
  }

  .page-content .code._highlighted span.cm-meta
  {
    color: #E8BF6A;
  }

  .standard-output
  {
    color: #EEE!important;
  }

  .error-output
  {
    color: #CD3524!important;
  }
/*dropdowns*/
  .dropdown-items
  {
    background: #2B2B2B!important;
  }

  .dropdown.js-dropdown
  {
    background: #252525!important;
  }

  .dropdown-selected-value
  {
    background: #313335 !important;
  }

  .dropdown-item:hover
  {
    background-color: #555555;
  }
    `;

    const style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = css;
    document.body.appendChild(style);
})();