feat: dark mode

css/index.scss

@@ -6,6 +6,24 @@
 $break-small: 500px;
 $break-large: 840px;
 
+:root {
+  --background: #fff;
+  --text: #000;
+  --accent: #4f33e8;
+  --highlight: #f6f6f6;
+  --tone: #989898;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --background: #261e3a;
+    --text: #e2dfea;
+    --accent: #7033e8;
+    --highlight: #140d25;
+    --tone: #989898;
+  }
+}
+
 body {
   width: 900px;
   margin: 0 auto;
@@ -17,6 +35,8 @@ body {
   -webkit-font-feature-settings: "kern", "palt", "pwid";
   -moz-font-feature-settings: "kern", "palt", "pwid";
   -moz-font-feature-settings: "kern=1", "palt", "pwid";
+  background: var(--background);
+  color: var(--text);
 
   @media screen and (max-width: $break-large) {
     width: auto;
@@ -34,6 +54,7 @@ body {
   border-radius: 3px;
   // font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
   // font-size: 14px;
+  background: #0e0127 !important;
   padding: 12px 18px !important;
   line-height: 1.6em !important;
 }
@@ -42,7 +63,7 @@ code {
 }
 p code {
   padding: 3px 10px;
-  background: #f6f6f6;
+  background: var(--highlight);
   border-radius: 3px;
   font-size: 16px;
 }
@@ -50,7 +71,7 @@ a:hover,
 a:active,
 a:link,
 a:visited {
-  color: black;
+  color: var(--text);
   text-decoration: none;
 }
 h1,
@@ -66,7 +87,7 @@ hr {
   display: block;
   width: 100%;
   height: 1px;
-  background-color: #dbdbdb;
+  background-color: var(--highlight);
   border: 0;
   margin: 40px 0;
 }
@@ -86,6 +107,9 @@ hr {
 
   .logo {
     margin: 10px 0 10px;
+    @media (prefers-color-scheme: dark) {
+      filter: invert(1);
+    }
   }
 
   .menu {