Complete visual redesign: light theme with warm coral accents

- White/cream backgrounds instead of dark blue/purple
- Coral/warm red (#e85d4a) as primary accent color
- Dark hero section transitions to light content areas
- Header changes from dark to white on scroll
- White pricing cards with subtle shadows
- Dark "Miksi me" section for dramatic contrast
- Dark footer for visual weight
- Green energy section de-emphasized (simple light styling)
- All section backgrounds adjusted for light theme alternation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

index.html

@@ -165,7 +165,7 @@
     </section>
 
     <!-- Hinnat -->
-    <section class="section section-dark" id="hinnat">
+    <section class="section section-alt" id="hinnat">
         <div class="container">
             <h2 class="section-title">Hinnat</h2>
             <p class="section-subtitle">Selkeä kuukausihinnoittelu ilman piilokustannuksia. Kaikki hinnat alv 0%.</p>
@@ -479,7 +479,7 @@
     </section>
 
     <!-- Usein kysytyt kysymykset -->
-    <section class="section section-dark" id="ukk">
+    <section class="section section-alt" id="ukk">
         <div class="container">
             <h2 class="section-title">Usein kysytyt kysymykset</h2>
             <p class="section-subtitle">Vastauksia yleisimpiin colocation-palveluita koskeviin kysymyksiin</p>