feat: add cloud video background and update StackSection styling to dark theme

src/pages/home/StackSection.tsx

@@ -24,7 +24,7 @@ const stackData = [
 
 export function StackSection() {
   return (
-    <section className="relative bg-white py-20 lg:py-32">
+    <section className="relative bg-black py-20 lg:py-32">
       <Container>
         <div className="grid grid-cols-1 lg:grid-cols-3 gap-12 items-start">
           {/* Left Column - Text */}
@@ -35,7 +35,7 @@ export function StackSection() {
             transition={{ duration: 0.5 }}
             className="lg:col-span-1"
           >
-            <h2 className="text-3xl lg:text-4xl font-medium tracking-tight text-gray-900">
+            <h2 className="text-3xl lg:text-4xl font-medium tracking-tight text-white">
               The Mycelium Stack
             </h2>
             <p className="mt-6 text-lg text-gray-600">