Stack Overflow: Dark theme fixes

Includes some temporary fixes for some bugs in the beta Stack Overflow dark theme (found in https://stackoverflow.com/users/preferences/), before they get fixed. Suggest new fixes if you find them; I might add them.

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Stack Overflow: Dark theme fixes
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Includes some temporary fixes for some bugs in the beta Stack Overflow dark theme (found in https://stackoverflow.com/users/preferences/), before they get fixed. Suggest new fixes if you find them; I might add them.
// @author       SUM1
// @match        https://*.stackoverflow.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // Edit answer pages
    if (/^https?:\/\/stackoverflow.com\/posts\/\d+\/edit/.test(document.URL)) {
        // Background colour of top help banner
        document.querySelector("#mainbar .s-notice").style.backgroundColor = 'var(--yellow-100)';
        // Question title colour
        document.querySelector(".post-editor > style").innerHTML = '\n            .question-hyperlink {\n                color: var(--black-800) !important;\n            }\n        ';
    }
    // Question pages
    if (/^https?:\/\/stackoverflow.com\/questions\/\d+\/.+/.test(document.URL)) {
        // Comment help background colour
        document.styleSheets[2].insertRule('.comment-help {background-color: var(--yellow-100); border-color: var(--yellow-200); }');
        // Comment help text colour
        document.styleSheets[2].insertRule('.comment-help > p {color: var(--black-800);}');
        // Comment help code colour
        document.styleSheets[2].insertRule('.comment-help > p > code {color: var(--black-800);}');
    }
})();