fix: DrillOrbit fades in/out at path edges, DrillBitSpinner uses radial mask instead of hard clip

Former-commit-id: 3aea27f3e17984634206ca817d074b18e712933e

components/blocks/CompetenceBentoGrid.tsx

@@ -8,6 +8,7 @@ import { Button } from '@/components/ui/Button';
 import { HoverShineOverlay } from '@/components/ui/HoverShineOverlay';
 import { StratumLines } from '@/components/ui/decorations/StratumLines';
 import { DrillBitSpinner } from '@/components/ui/decorations/DrillBitSpinner';
+import { DrillTeeth } from '@/components/ui/decorations/DrillTeeth';
 
 interface CompetenceBentoGridProps {
   badge?: string;
@@ -76,8 +77,8 @@ export function CompetenceBentoGrid(props: CompetenceBentoGridProps) {
   }
 
   return (
-    <section className="py-24 bg-neutral text-neutral-dark overflow-hidden relative">
-      <div className="container">
+    <section className="py-24 bg-neutral text-neutral-dark relative overflow-hidden">
+      <div className="container relative z-10 px-4">
         <div className="flex flex-col md:flex-row justify-between items-end mb-12">
           <div className="max-w-2xl">
             <h2 className="text-primary font-bold tracking-wider uppercase text-sm mb-3">{badge}</h2>
@@ -176,6 +177,8 @@ export function CompetenceBentoGrid(props: CompetenceBentoGridProps) {
       {/* Decorative: abstract earth strata / excavation layers */}
       <StratumLines placement="bottom-left" invert />
       <StratumLines placement="bottom-right" invert />
+      {/* Organic wave divider */}
+      <DrillTeeth position="bottom" fill="var(--color-neutral)" />
     </section>
   );
 }