Make Apple Silicon the primary download CTA on the site

Most visitors are on arm64 Macs, so surface that as a big white button
and demote the Intel build to a small secondary link underneath.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: frenchie4111

docs/index.html

@@ -363,19 +363,17 @@ <h2 class="text-4xl font-bold text-center mb-4">Download</h2>
       you're done.
     </p>
 
-    <div class="grid md:grid-cols-2 gap-4">
-      <a href="https://github.com/frenchie4111/harness/releases/latest/download/Harness-2.0.0-arm64.dmg"
-         class="block p-6 bg-neutral-950 border border-neutral-800 hover:border-neutral-600 rounded-xl transition-colors group">
-        <div class="text-xs text-neutral-500 mb-2 uppercase tracking-wider">M1 / M2 / M3 / M4</div>
-        <div class="text-xl font-semibold mb-1 group-hover:text-amber-400 transition-colors">Apple Silicon</div>
-        <div class="text-xs text-neutral-600 font-mono">Harness-arm64.dmg</div>
-      </a>
+    <a href="https://github.com/frenchie4111/harness/releases/latest/download/Harness-2.0.0-arm64.dmg"
+       class="block p-8 bg-white hover:bg-neutral-100 text-neutral-950 rounded-xl transition-colors group text-center">
+      <div class="text-xs text-neutral-500 mb-2 uppercase tracking-wider">M1 / M2 / M3 / M4</div>
+      <div class="text-3xl font-bold mb-2">Download for Apple Silicon</div>
+      <div class="text-xs text-neutral-500 font-mono">Harness-arm64.dmg</div>
+    </a>
 
+    <div class="mt-4 text-center">
       <a href="https://github.com/frenchie4111/harness/releases/latest/download/Harness-2.0.0.dmg"
-         class="block p-6 bg-neutral-950 border border-neutral-800 hover:border-neutral-600 rounded-xl transition-colors group">
-        <div class="text-xs text-neutral-500 mb-2 uppercase tracking-wider">x86_64</div>
-        <div class="text-xl font-semibold mb-1 group-hover:text-amber-400 transition-colors">Intel Mac</div>
-        <div class="text-xs text-neutral-600 font-mono">Harness.dmg</div>
+         class="text-sm text-neutral-500 hover:text-neutral-300 underline transition-colors">
+        On an Intel Mac? Download the x86_64 build
       </a>
     </div>