Add rudimentary theming, checks for .directory-listing-ok file

style/nord.css

@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2016-present Sven Greb <development@svengreb.de>
+ * This source code is licensed under the MIT license found in the license file.
+ */
+
+/*
+ * References:
+ *   1. https://www.w3.org/TR/css-variables
+ *   2. https://www.w3.org/TR/selectors/#root-pseudo
+ *   3. https://drafts.csswg.org/css-variables
+ *   4. https://developer.mozilla.org/en-US/docs/Web/CSS/Using_CSS_variables
+ *   5. https://warpspire.com/kss
+ *   6. https://github.com/kss-node/kss-node
+ */
+
+/*
+An arctic, north-bluish color palette.
+Created for the clean- and minimal flat design pattern to achieve a optimal focus and readability for code syntax
+highlighting and UI.
+It consists of a total of sixteen, carefully selected, dimmed pastel colors for a eye-comfortable, but yet colorful
+ambiance.
+
+Styleguide Nord
+*/
+
+:root {
+  /*
+  Base component color of "Polar Night".
+
+  Used for texts, backgrounds, carets and structuring characters like curly- and square brackets.
+
+  Markup:
+  <div style="background-color:#2e3440; width=60; height=60"></div>
+
+  Styleguide Nord - Polar Night
+  */
+  --nord0: #2e3440;
+
+  /*
+  Lighter shade color of the base component color.
+
+  Used as a lighter background color for UI elements like status bars.
+
+  Markup:
+  <div style="background-color:#3b4252; width=60; height=60"></div>
+
+  Styleguide Nord - Polar Night
+  */
+  --nord1: #3b4252;
+
+  /*
+  Lighter shade color of the base component color.
+
+  Used as line highlighting in the editor.
+  In the UI scope it may be used as selection- and highlight color.
+
+  Markup:
+  <div style="background-color:#434c5e; width=60; height=60"></div>
+
+  Styleguide Nord - Polar Night
+  */
+  --nord2: #434c5e;
+
+  /*
+  Lighter shade color of the base component color.
+
+  Used for comments, invisibles, indent- and wrap guide marker.
+  In the UI scope used as pseudoclass color for disabled elements.
+
+  Markup:
+  <div style="background-color:#4c566a; width=60; height=60"></div>
+
+  Styleguide Nord - Polar Night
+  */
+  --nord3: #4c566a;
+
+  /*
+  Base component color of "Snow Storm".
+
+  Main color for text, variables, constants and attributes.
+  In the UI scope used as semi-light background depending on the theme shading design.
+
+  Markup:
+  <div style="background-color:#d8dee9; width=60; height=60"></div>
+
+  Styleguide Nord - Snow Storm
+  */
+  --nord4: #d8dee9;
+
+  /*
+  Lighter shade color of the base component color.
+
+  Used as a lighter background color for UI elements like status bars.
+  Used as semi-light background depending on the theme shading design.
+
+  Markup:
+  <div style="background-color:#e5e9f0; width=60; height=60"></div>
+
+  Styleguide Nord - Snow Storm
+  */
+  --nord5: #e5e9f0;
+
+  /*
+  Lighter shade color of the base component color.
+
+  Used for punctuations, carets and structuring characters like curly- and square brackets.
+  In the UI scope used as background, selection- and highlight color depending on the theme shading design.
+
+  Markup:
+  <div style="background-color:#eceff4; width=60; height=60"></div>
+
+  Styleguide Nord - Snow Storm
+  */
+  --nord6: #eceff4;
+
+  /*
+  Bluish core color.
+
+  Used for classes, types and documentation tags.
+
+  Markup:
+  <div style="background-color:#8fbcbb; width=60; height=60"></div>
+
+  Styleguide Nord - Frost
+  */
+  --nord7: #8fbcbb;
+
+  /*
+  Bluish core accent color.
+
+  Represents the accent color of the color palette.
+  Main color for primary UI elements and methods/functions.
+
+  Can be used for
+    - Markup quotes
+    - Markup link URLs
+
+  Markup:
+  <div style="background-color:#88c0d0; width=60; height=60"></div>
+
+  Styleguide Nord - Frost
+  */
+  --nord8: #88c0d0;
+
+  /*
+  Bluish core color.
+
+  Used for language-specific syntactic/reserved support characters and keywords, operators, tags, units and
+  punctuations like (semi)colons,commas and braces.
+
+  Markup:
+  <div style="background-color:#81a1c1; width=60; height=60"></div>
+
+  Styleguide Nord - Frost
+  */
+  --nord9: #81a1c1;
+
+  /*
+  Bluish core color.
+
+  Used for markup doctypes, import/include/require statements, pre-processor statements and at-rules (`@`).
+
+  Markup:
+  <div style="background-color:#5e81ac; width=60; height=60"></div>
+
+  Styleguide Nord - Frost
+  */
+  --nord10: #5e81ac;
+
+  /*
+  Colorful component color.
+
+  Used for errors, git/diff deletion and linter marker.
+
+  Markup:
+  <div style="background-color:#bf616a; width=60; height=60"></div>
+
+  Styleguide Nord - Aurora
+  */
+  --nord11: #bf616a;
+
+  /*
+  Colorful component color.
+
+  Used for annotations.
+
+  Markup:
+  <div style="background-color:#d08770; width=60; height=60"></div>
+
+  Styleguide Nord - Aurora
+  */
+  --nord12: #d08770;
+
+  /*
+  Colorful component color.
+
+  Used for escape characters, regular expressions and markup entities.
+  In the UI scope used for warnings and git/diff renamings.
+
+  Markup:
+  <div style="background-color:#ebcb8b; width=60; height=60"></div>
+
+  Styleguide Nord - Aurora
+  */
+  --nord13: #ebcb8b;
+
+  /*
+  Colorful component color.
+
+  Main color for strings and attribute values.
+  In the UI scope used for git/diff additions and success visualizations.
+
+  Markup:
+  <div style="background-color:#a3be8c; width=60; height=60"></div>
+
+  Styleguide Nord - Aurora
+  */
+  --nord14: #a3be8c;
+
+  /*
+  Colorful component color.
+
+  Used for numbers.
+
+  Markup:
+  <div style="background-color:#b48ead; width=60; height=60"></div>
+
+  Styleguide Nord - Aurora
+  */
+  --nord15: #b48ead;
+}