Resolving quite some problems in the JS, marking the scss colors and more...

Changes to be committed:
    modified:   static/js/main.js
    modified:   config.toml
    modified:   content/posts/typography.md
    modified:   sass/_predefined.scss
    renamed:    static/js/clipboard.js -> static/js/copy.js
    deleted:    static/js/clipboard.min.js
    deleted:    static/js/katex.js
    deleted:    static/js/katex.min.js
    deleted:    sass/katex.min.css
    deleted:    sass/katex.css

3 files changed, 2 insertions, 1006 deletions

diff --git a/sass/_predefined.scss b/sass/_predefined.scss
index acdfa28..0cb193b 100644
--- a/sass/_predefined.scss
+++ b/sass/_predefined.scss
@@ -6,10 +6,10 @@ $text: #c6cddb; // general text // white grey
 $light-grey: #494f5c; // bg // all below are grey darkish
 $dark-grey: #3b3e48;
 $highlight-grey: #7d828a;
-$midnightblue: #31333d;
+$midnightblue: #2b303b; //#31333d; // to fix code syntax highlighting
 
 //$theme: #018574;
-//$text: #8dabd0; // general text // mod white
+//$text: #8dabd0; // fg // general text // mod white
 //$light-grey: #4e6695; // bg // mod blue
 //$dark-grey: #4e6695;
 //$highlight-grey: #4e6695;
diff --git a/sass/katex.css b/sass/katex.css
deleted file mode 100644
index 623cfe7..0000000
--- a/sass/katex.css
+++ /dev/null
@@ -1,1003 +0,0 @@
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-    font-family: KaTeX_AMS;
-    src: url(fonts/KaTeX_AMS-Regular.woff2) format("woff2"), url(fonts/KaTeX_AMS-Regular.woff) format("woff"), url(fonts/KaTeX_AMS-Regular.ttf) format("truetype");
-    font-weight: 400;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Caligraphic;
-    src: url(fonts/KaTeX_Caligraphic-Bold.woff2) format("woff2"), url(fonts/KaTeX_Caligraphic-Bold.woff) format("woff"), url(fonts/KaTeX_Caligraphic-Bold.ttf) format("truetype");
-    font-weight: 700;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Caligraphic;
-    src: url(fonts/KaTeX_Caligraphic-Regular.woff2) format("woff2"), url(fonts/KaTeX_Caligraphic-Regular.woff) format("woff"), url(fonts/KaTeX_Caligraphic-Regular.ttf) format("truetype");
-    font-weight: 400;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Fraktur;
-    src: url(fonts/KaTeX_Fraktur-Bold.woff2) format("woff2"), url(fonts/KaTeX_Fraktur-Bold.woff) format("woff"), url(fonts/KaTeX_Fraktur-Bold.ttf) format("truetype");
-    font-weight: 700;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Fraktur;
-    src: url(fonts/KaTeX_Fraktur-Regular.woff2) format("woff2"), url(fonts/KaTeX_Fraktur-Regular.woff) format("woff"), url(fonts/KaTeX_Fraktur-Regular.ttf) format("truetype");
-    font-weight: 400;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Main;
-    src: url(fonts/KaTeX_Main-Bold.woff2) format("woff2"), url(fonts/KaTeX_Main-Bold.woff) format("woff"), url(fonts/KaTeX_Main-Bold.ttf) format("truetype");
-    font-weight: 700;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Main;
-    src: url(fonts/KaTeX_Main-BoldItalic.woff2) format("woff2"), url(fonts/KaTeX_Main-BoldItalic.woff) format("woff"), url(fonts/KaTeX_Main-BoldItalic.ttf) format("truetype");
-    font-weight: 700;
-    font-style: italic;
-}
-@font-face {
-    font-family: KaTeX_Main;
-    src: url(fonts/KaTeX_Main-Italic.woff2) format("woff2"), url(fonts/KaTeX_Main-Italic.woff) format("woff"), url(fonts/KaTeX_Main-Italic.ttf) format("truetype");
-    font-weight: 400;
-    font-style: italic;
-}
-@font-face {
-    font-family: KaTeX_Main;
-    src: url(fonts/KaTeX_Main-Regular.woff2) format("woff2"), url(fonts/KaTeX_Main-Regular.woff) format("woff"), url(fonts/KaTeX_Main-Regular.ttf) format("truetype");
-    font-weight: 400;
-    font-style: normal;
-}
-@font-face {
-    font-family: KaTeX_Math;
-    src: url(fonts/KaTeX_Math-BoldItalic.woff2) format("woff2"), url(fonts/KaTeX_Math-BoldItalic.woff) format("woff"), url(fonts/KaTeX_Math-BoldItalic.ttf) format("truetype");
-    font-weight: 700;
-    font-style: italic;
-}
-@font-face {
-    font-family: KaTeX_Math;
-    src: url(fonts/KaTeX_Math-Italic.woff2) format("woff2"), url(fonts/KaTeX_Math-Italic.woff) format("woff"), url(fonts/KaTeX_Math-Italic.ttf) format("truetype");
-    font-weight: 400;
-    font-style: italic;
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-@font-face {
-    font-family: "KaTeX_SansSerif";
-    src: url(fonts/KaTeX_SansSerif-Bold.woff2) format("woff2"), url(fonts/KaTeX_SansSerif-Bold.woff) format("woff"), url(fonts/KaTeX_SansSerif-Bold.ttf) format("truetype");
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-.katex {
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-.katex * {
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-.katex .katex-version:after {
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-    padding: 0;
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-.katex .katex-html > .newline {
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-.katex .base {
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