style(ui): clean up site styling and section labels

- Soften global glow shadows to standard dark shadows
- Hide scanline background effect
- Format documentation and page section labels to be cleaner and more readable

src/pages/privacy.astro

@@ -7,7 +7,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
     <!-- Hero Section -->
     <section class="privacy-hero">
       <div class="container">
-        <div class="section-label">[PRIVACY]</div>
+        <div class="section-label">Privacy Policy</div>
         <h1 class="section-title">Privacy</h1>
         <p class="hero-subtitle">What data we collect, what we don't, and why that distinction matters.</p>
       </div>