Polish responsive design across all screen sizes and refine card blocks

- Enhance SurfaceCard with refined borders, layered shadows, and polished
  primary-tinted header with an icon container
- Update homepage blocks (hero, features, stats, login, news, photos) for
  proper mobile/tablet/desktop responsiveness and tighter mobile spacing
- Improve content-card, stat-block, card-grid and card styling with subtle
  depth (layered shadow + inner hairline) and smoother hover states
- Refine site header, footer, top header and site layout spacing for small
  screens while keeping a consistent professional look on large screens
- Add min-tap-height targets and responsive typography on mobile

src/app/(site)/layout.tsx

@@ -28,7 +28,7 @@ export default async function SiteLayout({
 				</>
 			) : null}
 			<main>
-				<div className="mx-auto mt-6 grid max-w-7xl grid-cols-12 gap-x-3 gap-y-6 px-4 py-4 md:mt-0 md:p-6">
+				<div className="mx-auto mt-4 grid max-w-7xl grid-cols-12 gap-x-3 gap-y-5 px-3 py-3 sm:px-4 sm:py-4 md:mt-0 md:px-6 md:py-6 md:gap-y-6">
 					<div className="col-span-12 min-w-0">
 						<MotionPageWrapper>{children}</MotionPageWrapper>
 					</div>