diff --git a/Makefile b/Makefile
index 0b6d2f3..e98f811 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,11 @@
 
-public/pyg.css: pygments_theme.txt
-	pygmentize -S "$(shell cat pygments_theme.txt)" -f html -a .codehilite > ./public/pyg.css
+public/pyg.css: Makefile pygments_theme_dark.txt pygments_theme_light.txt
+	echo "@media (prefers-color-scheme: dark) {" > $@
+	pygmentize -S "$(shell cat pygments_theme_dark.txt)" -f html -a .codehilite >> $@
+	echo "}" >> $@
+	echo "@media (prefers-color-scheme: light) {" >> $@
+	pygmentize -S "$(shell cat pygments_theme_light.txt)" -f html -a .codehilite >> $@
+	echo "}" >> $@
 
 .PHONY: all
 all:
diff --git a/public/pyg.css b/public/pyg.css
index d8946a7..89c6b28 100644
--- a/public/pyg.css
+++ b/public/pyg.css
@@ -1,3 +1,4 @@
+@media (prefers-color-scheme: dark) {
 pre { line-height: 125%; }
 td.linenos .normal { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
 span.linenos { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
@@ -84,3 +85,81 @@ span.linenos.special { color: #e6edf3; background-color: #6e7681; padding-left:
 .codehilite .vi { color: #79C0FF } /* Name.Variable.Instance */
 .codehilite .vm { color: #79C0FF } /* Name.Variable.Magic */
 .codehilite .il { color: #A5D6FF } /* Literal.Number.Integer.Long */
+}
+@media (prefers-color-scheme: light) {
+pre { line-height: 125%; }
+td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
+td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
+span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
+.codehilite .hll { background-color: #ffffcc }
+.codehilite { background: #f8f8f8; }
+.codehilite .c { color: #080; font-style: italic } /* Comment */
+.codehilite .err { border: 1px solid #F00 } /* Error */
+.codehilite .k { color: #A2F; font-weight: bold } /* Keyword */
+.codehilite .o { color: #666 } /* Operator */
+.codehilite .ch { color: #080; font-style: italic } /* Comment.Hashbang */
+.codehilite .cm { color: #080; font-style: italic } /* Comment.Multiline */
+.codehilite .cp { color: #080 } /* Comment.Preproc */
+.codehilite .cpf { color: #080; font-style: italic } /* Comment.PreprocFile */
+.codehilite .c1 { color: #080; font-style: italic } /* Comment.Single */
+.codehilite .cs { color: #080; font-weight: bold } /* Comment.Special */
+.codehilite .gd { color: #A00000 } /* Generic.Deleted */
+.codehilite .ge { font-style: italic } /* Generic.Emph */
+.codehilite .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
+.codehilite .gr { color: #F00 } /* Generic.Error */
+.codehilite .gh { color: #000080; font-weight: bold } /* Generic.Heading */
+.codehilite .gi { color: #00A000 } /* Generic.Inserted */
+.codehilite .go { color: #888 } /* Generic.Output */
+.codehilite .gp { color: #000080; font-weight: bold } /* Generic.Prompt */
+.codehilite .gs { font-weight: bold } /* Generic.Strong */
+.codehilite .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
+.codehilite .gt { color: #04D } /* Generic.Traceback */
+.codehilite .kc { color: #A2F; font-weight: bold } /* Keyword.Constant */
+.codehilite .kd { color: #A2F; font-weight: bold } /* Keyword.Declaration */
+.codehilite .kn { color: #A2F; font-weight: bold } /* Keyword.Namespace */
+.codehilite .kp { color: #A2F } /* Keyword.Pseudo */
+.codehilite .kr { color: #A2F; font-weight: bold } /* Keyword.Reserved */
+.codehilite .kt { color: #0B0; font-weight: bold } /* Keyword.Type */
+.codehilite .m { color: #666 } /* Literal.Number */
+.codehilite .s { color: #B44 } /* Literal.String */
+.codehilite .na { color: #B44 } /* Name.Attribute */
+.codehilite .nb { color: #A2F } /* Name.Builtin */
+.codehilite .nc { color: #00F } /* Name.Class */
+.codehilite .no { color: #800 } /* Name.Constant */
+.codehilite .nd { color: #A2F } /* Name.Decorator */
+.codehilite .ni { color: #999; font-weight: bold } /* Name.Entity */
+.codehilite .ne { color: #D2413A; font-weight: bold } /* Name.Exception */
+.codehilite .nf { color: #00A000 } /* Name.Function */
+.codehilite .nl { color: #A0A000 } /* Name.Label */
+.codehilite .nn { color: #00F; font-weight: bold } /* Name.Namespace */
+.codehilite .nt { color: #008000; font-weight: bold } /* Name.Tag */
+.codehilite .nv { color: #B8860B } /* Name.Variable */
+.codehilite .ow { color: #A2F; font-weight: bold } /* Operator.Word */
+.codehilite .w { color: #BBB } /* Text.Whitespace */
+.codehilite .mb { color: #666 } /* Literal.Number.Bin */
+.codehilite .mf { color: #666 } /* Literal.Number.Float */
+.codehilite .mh { color: #666 } /* Literal.Number.Hex */
+.codehilite .mi { color: #666 } /* Literal.Number.Integer */
+.codehilite .mo { color: #666 } /* Literal.Number.Oct */
+.codehilite .sa { color: #B44 } /* Literal.String.Affix */
+.codehilite .sb { color: #B44 } /* Literal.String.Backtick */
+.codehilite .sc { color: #B44 } /* Literal.String.Char */
+.codehilite .dl { color: #B44 } /* Literal.String.Delimiter */
+.codehilite .sd { color: #B44; font-style: italic } /* Literal.String.Doc */
+.codehilite .s2 { color: #B44 } /* Literal.String.Double */
+.codehilite .se { color: #B62; font-weight: bold } /* Literal.String.Escape */
+.codehilite .sh { color: #B44 } /* Literal.String.Heredoc */
+.codehilite .si { color: #B68; font-weight: bold } /* Literal.String.Interpol */
+.codehilite .sx { color: #008000 } /* Literal.String.Other */
+.codehilite .sr { color: #B68 } /* Literal.String.Regex */
+.codehilite .s1 { color: #B44 } /* Literal.String.Single */
+.codehilite .ss { color: #B8860B } /* Literal.String.Symbol */
+.codehilite .bp { color: #A2F } /* Name.Builtin.Pseudo */
+.codehilite .fm { color: #00A000 } /* Name.Function.Magic */
+.codehilite .vc { color: #B8860B } /* Name.Variable.Class */
+.codehilite .vg { color: #B8860B } /* Name.Variable.Global */
+.codehilite .vi { color: #B8860B } /* Name.Variable.Instance */
+.codehilite .vm { color: #B8860B } /* Name.Variable.Magic */
+.codehilite .il { color: #666 } /* Literal.Number.Integer.Long */
+}
diff --git a/pygments_theme.txt b/pygments_theme.txt
deleted file mode 100644
index b5d11f8..0000000
--- a/pygments_theme.txt
+++ /dev/null
@@ -1 +0,0 @@
-github-dark