Trying styling.

_config.yml

@@ -1 +1 @@
-remote_theme: cotes2020/jekyll-theme-chirpy
+# remote_theme: cotes2020/jekyll-theme-chirpy

assets/css/style.scss

@@ -0,0 +1,20 @@
+@media (prefers-color-scheme: dark){
+  body {color:#fff;background:#000}
+  a:link {color:#9cf}
+  a:hover, a:visited:hover {color:#cef}
+  a:visited {color:#c9f}
+}
+body{
+  margin:1em auto;
+  max-width:40em;
+  padding:0 .62em;
+  font:1.2em/1.62 sans-serif;
+}
+h1,h2,h3 {
+  line-height:1.2;
+}
+@media print{
+  body{
+    max-width:none
+  }
+}