feat(docs): add dark mode toggle (#14)

Author: uhyo

README.md

@@ -225,9 +225,10 @@ The Navigation API is supported in:
 
 - Chrome 102+
 - Edge 102+
+- Safari 26.2+
 - Opera 88+
 
-Firefox and Safari do not yet support the Navigation API. For these browsers, consider using a polyfill.
+Firefox does not yet support the Navigation API. For Firefox, consider using a polyfill.
 
 ## License
 

packages/docs/src/pages/GettingStartedPage.tsx

@@ -26,8 +26,9 @@ yarn add @funstack/router`}</code>
           >
             Navigation API
           </a>{" "}
-          which is currently supported in Chromium-based browsers. For broader
-          browser support, consider using a polyfill.
+          which is supported in Chrome 102+, Edge 102+, Safari 26.2+, and Opera
+          88+. Firefox does not yet support the Navigation API; for Firefox,
+          consider using a polyfill.
         </p>
       </section>
 

packages/docs/src/styles.css

@@ -24,6 +24,21 @@
   --header-height: 64px;
 }
 
+@media (prefers-color-scheme: dark) {
+  :root {
+    --color-bg: #0f0f1a;
+    --color-bg-secondary: #1a1a2e;
+    --color-bg-code: #0a0a12;
+    --color-text: #e8e8f0;
+    --color-text-secondary: #a0a0b8;
+    --color-text-code: #e0e0e0;
+    --color-primary: #818cf8;
+    --color-primary-dark: #6366f1;
+    --color-border: #2a2a40;
+    --color-link: #818cf8;
+  }
+}
+
 html {
   scroll-behavior: smooth;
 }