fix: min-height:280px vom hero-slider entfernt

Slide 0 hat weniger Inhalt seit Video ausgelagert wurde,
die fixe min-height erzeugte unnötigen Leerraum vor den Dots.

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

vorschau/css/style.css

@@ -78,7 +78,7 @@ a { color:inherit; text-decoration:none; }
 .hero-brand { margin-bottom:28px; }
 .hero-tagline { font-size:1.05rem; font-weight:300; color:rgba(255,255,255,0.6); margin-top:8px; }
 
-.hero-slider { position:relative; min-height:280px; }
+.hero-slider { position:relative; }
 .hero-slide { position:absolute; top:0; left:0; width:100%; opacity:0; transform:translateY(12px); transition:opacity 0.6s ease, transform 0.6s ease; pointer-events:none; visibility:hidden; }
 .hero-slide.active { position:relative; opacity:1; transform:translateY(0); pointer-events:auto; visibility:visible; }
 .hero-slide.exiting { opacity:0; transform:translateY(-12px); transition:opacity 0.4s ease, transform 0.4s ease; }