127 lines
8.5 KiB
Markdown
127 lines
8.5 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project Overview
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CiMa Progetti marketing website — Italian digital services company. Frontend-only, no backend.
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## Commands
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All commands run from `frontend/`:
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```bash
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npm run dev # Dev server on localhost:3000
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npm run build # Production build
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npm start # Production server
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npm run lint # ESLint (eslint-config-next with core-web-vitals)
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```
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No test framework is configured.
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## Architecture
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**Stack**: Next.js 16.2.2 (App Router), React 19, TypeScript 5 (strict), Tailwind CSS 4, GSAP 3.14.2
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**Performance-critical pattern**: The homepage (`src/app/page.tsx`) is a **Server Component**. Only `HeroSection` renders server-side for fast FCP/LCP. All other sections are dynamically imported with `ssr: false` via `HomeSections.tsx` (client component), so GSAP and section code only load after initial paint.
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**GSAP ScrollTrigger** is registered once in `useGsapScrollTrigger.ts` hook. Individual section components must NOT call `gsap.registerPlugin(ScrollTrigger)` — they rely on the parent `HomeSections` calling the hook before they mount.
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**HeroSection uses CSS animations, not GSAP** — the headline uses `hero-slide-up` (transform only, no opacity) so LCP fires immediately. CTA buttons use `hero-fade-up` with staggered delays. These keyframes are in `globals.css`.
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**Material Symbols font** is NOT in `<head>`. It's loaded lazily via `MaterialSymbolsFont.tsx` component (useEffect injection) — included in `HomeSections.tsx` and `contatti/page.tsx` only.
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**Lazy loading**: `LazySection` component wraps content with IntersectionObserver (threshold 0.1, rootMargin 50px) and shows `SkeletonWave` placeholders until visible.
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## Design System
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Tailwind theme tokens are defined inline in `globals.css` via `@theme`. Primary color: `#0001bb`. Material Design 3-inspired color tokens (background, surface, primary, secondary, error + on-* variants).
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Custom utility class `text-huge` uses `clamp(2rem, 8vw, 8rem)` for responsive headlines.
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Scroll snap: `.snap-container` (y proximity) + `.snap-section` (align start) on homepage sections.
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## Navbar
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**Responsive breakpoints**: The navbar uses `lg` (1024px) as the mobile/desktop toggle. Between `lg` and `xl` (1280px), text sizes, gaps, and padding scale down to prevent overflow. Mobile (<1024px) has compact padding and logo.
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**Active section indicator**: Scroll-based detection (not IntersectionObserver — sections are dynamically imported with `ssr: false` so they don't exist at mount time). A sliding `h-1 bg-primary` bar under the desktop nav links animates between sections using CSS transitions. Only visible on homepage (`pathname === "/"`). Recalculates position on scroll state change and window resize.
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## Custom Cursor (`CustomCursor.tsx`)
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A GSAP-powered custom cursor rendered in `layout.tsx` (direct import, not `next/dynamic` — `ssr: false` is not allowed in Server Component layouts in Next.js 16). Desktop-only (`pointer: fine`), disabled for `prefers-reduced-motion`.
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**Default shape**: Terminal-style block (22×22px, 5px radius), white fill + 2px outline ring with 1px gap. Uses `mix-blend-mode: difference` for automatic color inversion against any background.
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**Mouse tracking**: Uses `gsap.to` with `overwrite: "auto"` for all positioning. Does NOT use `gsap.quickTo` — it conflicts with `gsap.to` on the same x/y properties during morph transitions (causes "not eligible for reset" errors).
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**Three interaction modes** (opt-in via `data-cursor` attribute):
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### `data-cursor="hug"` — Hug mode
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- Cursor morphs into a transparent outline frame around the element with 6px padding
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- Element scales to 1.05 with glow (`box-shadow` via `.cursor-hugged` class in `globals.css`)
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- Click bounce: mousedown → scale(0.95), mouseup → scale(1.08) → scale(1.05) spring
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- Border-radius resolved from element, then first child (for wrapper divs like the About photo), fallback to pill (`100px`)
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- Used on: hero CTAs, navbar desktop links + Contattaci button, CtaSection button, contatti page phone/email links, footer social icons, About section photo
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### `data-cursor="underline"` — Underline mode
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- Cursor morphs into a 3px-tall bar under the `<h3>` question text
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- Used on: FAQ section question items
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### FAQ split/merge (underline + block cursor)
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- When a FAQ accordion opens (`data-faq-open` attribute detected via MutationObserver):
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1. A phantom div takes over the underline position (stays as visual anchor)
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2. Main cursor pulses (thickens to 6px), then peels off as a block cursor
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3. Block cursor is free to follow the mouse through the answer text
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- When the FAQ closes: block cursor flies back up to the underline, phantom fades out, cursor becomes the underline again
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- Switching FAQs: block cursor flies directly to the new question's underline
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### Shared behaviors
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- **Rubber-band pull**: While morphed (hug or underline), cursor applies 15% of mouse-to-element-center distance as pull offset. Gives an elastic "trying to follow" feel.
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- **Scroll tracking**: `scroll` event recalculates morph position from `getBoundingClientRect()`. Both the main cursor and phantom underline update on scroll.
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- **Z-index**: Walks the full ancestor chain and uses the highest explicit z-index + 1. Navbar elements get z-51 (above backdrop blur). Body content gets z-1 (below navbar). Default circle mode stays at z-9999.
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- **Edge cases**: Cursor hidden until first mousemove. Fades out when mouse leaves window. Event delegation via `closest()` — no cached DOM refs (SPA-safe).
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### Files involved
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- `src/components/CustomCursor.tsx` — All cursor logic (self-contained client component)
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- `src/app/globals.css` — `cursor: none` media query, `.cursor-hugged` glow class
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- `src/app/layout.tsx` — Renders `<CustomCursor />` as last child in `<body>`
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- `src/components/sections/FaqSection.tsx` — `data-cursor="underline"`, `data-faq-open` attribute
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## Key Conventions
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- Path alias: `@/*` maps to `./src/*`
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- Language: Italian (`lang="it"`) — all UI copy is in Italian
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- Inter font loaded via `next/font/google` (self-hosted, auto-subsetted)
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- Images use `next/image` with AVIF/WebP formats, 1-year cache TTL
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- `prefers-reduced-motion` is respected globally in CSS
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- Pages: `/` (homepage), `/contatti` (contact page)
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## Agents
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This project uses specialized subagents (defined in `.claude/agents/` and `frontend/.claude/agents/`). Each has persistent memory and a focused role. The user expects you to delegate to these agents rather than doing everything inline.
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### Typical workflow
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1. **brainstormer** — Launched first when a feature request is vague or has gaps. Asks the user 3-5 targeted questions to clarify requirements, edge cases, mobile behavior, and data flow. Produces a structured spec. Does not write code.
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2. **task-planner** — Takes a clarified feature (from brainstormer or a clear user request) and analyzes the codebase to produce a detailed task breakdown: file paths, dependencies, acceptance criteria. Runs on Opus. Does not write code.
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3. **frontend-dev** — Executes well-defined frontend tasks from the planner. Reads existing code first, then implements. Next.js App Router, TypeScript, Tailwind. Runs on Haiku for speed. No planning, no extras.
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4. **aspnet-backend-dev** — Same as frontend-dev but for C# ASP.NET backend tasks. Implements endpoints, services, repos, middleware. Follows existing DI/pattern conventions. Runs on Haiku. (Backend not yet present in this repo.)
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5. **commands-master** — Handles package management: installing, removing, updating dependencies, resolving conflicts, auditing vulnerabilities. Lives in `frontend/.claude/agents/`. Runs on Haiku. Does not write application code.
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6. **validation-tester** — Final step after any coding work. Runs `npm run build`, checks for TypeScript errors, runs tests if they exist, and produces a structured error report if anything fails. Runs on Opus. Never modifies production code.
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7. **git-master** — Commits, pushes, resolves merge conflicts, fixes detached HEAD / rebase issues. Uses conventional commit format `type(scope): description`. Runs on Haiku. Never force-pushes without explicit instruction.
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### When to use which
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- Ambiguous request -> **brainstormer** -> **task-planner** -> **frontend-dev** / **aspnet-backend-dev** -> **validation-tester** -> **git-master**
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- Clear implementation task -> **frontend-dev** or **aspnet-backend-dev** directly -> **validation-tester**
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- Need a new package -> **commands-master**
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- Commit and push -> **git-master**
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- Build broke after changes -> **validation-tester** to diagnose
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