feat: add custom cursor, navbar responsiveness, and active section indicator

frontend/.claude/agent-memory/frontend-dev/MEMORY.md

@@ -0,0 +1 @@
+- [Custom Cursor Feature](feature_custom_cursor.md) — Custom cursor with hug behavior, tracking, and click bounce animations

frontend/.claude/agent-memory/frontend-dev/feature_custom_cursor.md

@@ -0,0 +1,38 @@
+---
+name: Custom Cursor Feature Implementation
+description: Custom cursor with hug behavior and click bounce animations using GSAP
+type: project
+---
+
+**Feature**: Custom cursor with smooth tracking, element hug behavior, and click animations
+
+**Implementation details**:
+- Component: `/frontend/src/components/CustomCursor.tsx` — "use client" component
+- Styling: CSS rules added to `/frontend/src/app/globals.css`
+- Layout integration: Loaded via `next/dynamic` with `ssr: false` in `/frontend/src/app/layout.tsx`
+
+**How it works**:
+- 35px white donut ring cursor (white fill + 2px outline with 1px gap)
+- Smooth tracking with `gsap.quickTo` (0.15s duration, power2.out easing)
+- Device detection: requires `(pointer: fine)` and `prefers-reduced-motion: no-preference`
+- Event delegation (no DOM caching) — uses `closest('[data-cursor="hug"]')` for element detection
+
+**Hug behavior** (on elements with `data-cursor="hug"`):
+- Element with transparent background: cursor fills element (opacity 0.15 as fill), applies blue glow to element
+- Element with visible background: cursor becomes oversized glow border around element
+- Both: scale element to 1.05 during hover, restore on leave
+- All animations use GSAP timelines (0.3s duration, power3.out easing)
+
+**Click bounce**:
+- `mousedown`: scale 0.95 (0.1s, power2.in)
+- `mouseup`: scale 1.08 (0.15s, back.out(2)), then scale 1.05 (0.3s, power2.out)
+
+**Elements with hug behavior** (data-cursor="hug" added to):
+- HeroSection: both CTA links
+- Navbar: desktop nav links + desktop "Contattaci" button (NOT mobile menu)
+- CtaSection: "Contattaci" button
+- contatti/page.tsx: phone number and email links (prominent ones only)
+
+**Styling rules**:
+- Native cursor hidden on desktop via media query (pointer: fine)
+- `.cursor-hugged` class applies `box-shadow: 0 0 25px rgba(0, 1, 187, 0.25)` during hug state