Use CSS variables for themes (#528)

* Update formatting

* Merge default tag color with category-less tags

* Use CSS variables for colors

* Add dark theme colors

* Move color variables into display.css

* Remove old stylesheets

* Update headings

* Bump minimum Firefox version to support CSS var()

* Revert popular kanji text color

1 files changed, 0 insertions, 103 deletions

diff --git a/ext/mixed/css/display-dark.css b/ext/mixed/css/display-dark.css
deleted file mode 100644
index acfa2782..00000000
--- a/ext/mixed/css/display-dark.css
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Copyright (C) 2019-2020  Yomichan Authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the entrys of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-
-body { background-color: #1e1e1e; color: #d4d4d4; }
-
-h2 { border-bottom-color: #2f2f2f; }
-
-.navigation-header {
-    background-color: #1e1e1e;
-    border-bottom-color: #2f2f2f;
-}
-
-.entry+.entry { border-top-color: #2f2f2f; }
-
-.kanji-glyph-data>tbody>tr>* { border-top-color: #3f3f3f; }
-
-.tag { color: #e1e1e1; }
-.tag[data-category=default]      { background-color: #69696e; }
-.tag[data-category=name]         { background-color: #489148; }
-.tag[data-category=expression]   { background-color: #b07f39; }
-.tag[data-category=popular]      { background-color: #025caa; }
-.tag[data-category=frequent]     { background-color: #4490a7; }
-.tag[data-category=archaism]     { background-color: #b04340; }
-.tag[data-category=dictionary]   { background-color: #9057ad; }
-.tag[data-category=frequency]    { background-color: #489148; }
-.tag[data-category=partOfSpeech] { background-color: #565656; }
-.tag[data-category=search]       { background-color: #69696e; }
-.tag[data-category=pitch-accent-dictionary] { background-color: #6640be; }
-
-.term-reasons { color: #888888; }
-
-.term-expression>.term-expression-text .kanji-link {
-    border-bottom-color: #888888;
-    color: #cccccc;
-}
-
-.term-expression[data-frequency=popular]>.term-expression-text,
-.term-expression[data-frequency=popular]>.term-expression-text .kanji-link {
-    color: #0275d8;
-}
-
-.term-expression[data-frequency=rare]>.term-expression-text,
-.term-expression[data-frequency=rare]>.term-expression-text .kanji-link {
-    color: #666666;
-}
-
-.term-definition-list,
-.term-pitch-accent-group-list,
-.term-pitch-accent-disambiguation-list,
-.kanji-glossary-list {
-    color: #888888;
-}
-
-.term-glossary,
-.term-pitch-accent,
-.kanji-glossary {
-    color: #d4d4d4;
-}
-
-.icon-checkbox:checked + label {
-    /* invert colors */
-    background-color: #d4d4d4;
-    color: #1e1e1e;
-}
-
-.term-pitch-accent-container { border-bottom-color: #2f2f2f; }
-
-.term-pitch-accent-character:before { border-color: #ffffff; }
-
-.term-pitch-accent-graph-line,
-.term-pitch-accent-graph-line-tail,
-#term-pitch-accent-graph-dot,
-#term-pitch-accent-graph-dot-downstep,
-#term-pitch-accent-graph-triangle {
-    stroke: #ffffff;
-}
-
-#term-pitch-accent-graph-dot,
-#term-pitch-accent-graph-dot-downstep>circle:last-of-type {
-    fill: #ffffff;
-}
-
-.term-glossary-image-container {
-    background-color: #2f2f2f;
-}
-.term-glossary-image-container-overlay {
-    color: #888888;
-}