redesign(homepage): elegant editorial redesign with scroll animations

- HeroSection: full-viewport split layout with staggered entrance animations,
  editorial typography, tech stack tags, animated scroll indicator
- WorksSection: refined header with section label, scroll-reveal on entry
- ProjectCard: per-card IntersectionObserver reveal, numbered projects,
  enhanced hover states (scale + brightness), improved CTA
- FeatureSection: card grid with border/glass treatment and staggered reveals
- AboutSection: animated timeline progress line, scroll-triggered card entrances
- FeatureColumn: icon container with hover treatment
- globals.css: fadeUp/lineGrow/arrowBounce keyframes, .reveal utility,
  prefers-reduced-motion support, brand-accent color token
- lib/useReveal.ts: IntersectionObserver hook for scroll reveals

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

components/sections/WorksSection.tsx

@@ -1,3 +1,6 @@
+'use client';
+
+import { useRef, useEffect } from 'react';
 import { Project } from "@/lib/projects/types";
 import { ProjectCard } from "../ui/ProjectCard";
 
@@ -7,18 +10,53 @@ type props = {
 };
 
 export default function WorksSection({ projects, locale }: props) {
-    return (
-        <section id="works" className="w-full flex flex-col items-start justify-start">
-            <h2 className="text-[clamp(80px,10vw,128px)] font-serif text-brand-brown mt-6 mb-4">Travaux</h2>
+    const sectionRef = useRef<HTMLElement>(null);
 
-            {projects.map((project, index) => (
-                <ProjectCard
-                    key={project.slug}
-                    project={project}
-                    locale={locale}
-                    isTheLast={index === projects.length - 1}
-                />
-            ))}
+    useEffect(() => {
+        const section = sectionRef.current;
+        if (!section) return;
+
+        const observer = new IntersectionObserver(
+            (entries) => {
+                entries.forEach((entry) => {
+                    if (entry.isIntersecting) {
+                        entry.target.querySelectorAll('.reveal').forEach((el, i) => {
+                            setTimeout(() => el.classList.add('visible'), i * 120);
+                        });
+                        observer.unobserve(entry.target);
+                    }
+                });
+            },
+            { threshold: 0.08 }
+        );
+
+        observer.observe(section);
+        return () => observer.disconnect();
+    }, []);
+
+    return (
+        <section id="works" ref={sectionRef} className="w-full flex flex-col items-start justify-start pt-20 md:pt-28">
+            {/* Section label */}
+            <div className="reveal flex items-center gap-3 mb-4">
+                <span className="w-8 h-px bg-brand-brown/40" />
+                <span className="font-sans text-[11px] uppercase tracking-[0.2em] text-brand-brown/45">Sélection de projets</span>
+            </div>
+
+            <h2 className="reveal font-serif text-[clamp(56px,8vw,112px)] text-brand-brown leading-none mb-12 md:mb-16">
+                Travaux
+            </h2>
+
+            <div className="w-full">
+                {projects.map((project, index) => (
+                    <ProjectCard
+                        key={project.slug}
+                        project={project}
+                        locale={locale}
+                        isTheLast={index === projects.length - 1}
+                        index={index}
+                    />
+                ))}
+            </div>
         </section>
     );
 }