Accueil: etoiles flottantes + animations forcees

- Retire le kill-switch prefers-reduced-motion (* { animation:none }) qui
  coupait toutes les animations : etoiles, flottement du logo, apparitions
  au defilement ne bougeaient pas. Animations desormais toujours actives.
- Nouveau StarField : champ d'etoiles qui scintillent ET derivent
  (keyframe plr-drift via propriete translate, cumulee au scintillement),
  place dans le hero. Contenu du hero passe au-dessus (z-index).
- Carrousel : fondu force (n'est plus desactive sous reduced-motion).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/globals.css

@@ -88,9 +88,18 @@ button {
     transform: translateY(-14px) rotate(0.6deg);
   }
 }
-@media (prefers-reduced-motion: reduce) {
-  * {
-    animation: none !important;
+/* Dérive lente des étoiles. Utilise la propriété `translate` (indépendante de
+   `transform`) pour se cumuler avec le scintillement `plr-twinkle`. */
+@keyframes plr-drift {
+  0%,
+  100% {
+    translate: 0 0;
+  }
+  33% {
+    translate: 12px -18px;
+  }
+  66% {
+    translate: -10px 10px;
   }
 }
 
@@ -98,6 +107,20 @@ button {
   clip-path: polygon(50% 0, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0 50%, 40% 40%);
 }
 
+/* ---- Champ d'étoiles flottantes ---- */
+.starfield {
+  position: absolute;
+  inset: 0;
+  overflow: hidden;
+  pointer-events: none;
+  z-index: 0;
+}
+.starfield .star {
+  position: absolute;
+  animation: plr-twinkle var(--tw, 3.2s) ease-in-out infinite,
+    plr-drift var(--dr, 9s) ease-in-out infinite;
+}
+
 /* ---- Scroll-reveal entrance animations ---- */
 @keyframes plr-fade-up {
   from {
@@ -134,16 +157,6 @@ button {
 .reveal-stagger.is-visible > *:nth-child(8) { animation-delay: 0.46s; }
 .reveal-stagger.is-visible > *:nth-child(n + 9) { animation-delay: 0.52s; }
 
-@media (prefers-reduced-motion: reduce) {
-  .reveal,
-  .reveal-stagger > * {
-    opacity: 1 !important;
-  }
-  .reveal.is-visible,
-  .reveal-stagger.is-visible > * {
-    animation: none !important;
-  }
-}
 .twinkle {
   animation: plr-twinkle 3.2s ease-in-out infinite;
 }

src/app/page.tsx

@@ -5,6 +5,7 @@ import { SiteHeader } from "@/components/SiteHeader";
 import { SiteFooter } from "@/components/SiteFooter";
 import { MembershipModalButton } from "@/components/MembershipModalButton";
 import { MembersCarousel } from "@/components/MembersCarousel";
+import { StarField } from "@/components/StarField";
 import { getLivePromotions, getRotatingActiveMembers } from "@/lib/queries";
 
 export const dynamic = "force-dynamic";
@@ -40,12 +41,9 @@ export default async function AccueilPage() {
           className="grid hero-grid"
           style={{ position: "relative", padding: "30px 0 50px", overflow: "hidden", alignItems: "center" }}
         >
-          <Sparkle color="#E0A63C" size={22} style={{ top: 30, left: 20 }} duration={3.2} />
-          <Sparkle color="#6FB0C6" size={15} style={{ bottom: 64, left: 120 }} duration={2.6} delay={0.4} />
-          <Sparkle color="#9a6638" size={18} style={{ top: 40, right: 90 }} duration={3.8} delay={0.9} />
-          <Sparkle color="#2C6FB3" size={24} style={{ bottom: 80, right: 180 }} duration={3} delay={1.3} />
+          <StarField />
 
-          <div style={{ display: "flex", justifyContent: "center", alignItems: "center" }}>
+          <div style={{ position: "relative", zIndex: 1, display: "flex", justifyContent: "center", alignItems: "center" }}>
             {/* eslint-disable-next-line @next/next/no-img-element */}
             <img
               src="/assets/logo.png"
@@ -61,7 +59,7 @@ export default async function AccueilPage() {
             />
           </div>
 
-          <Reveal className="reveal">
+          <Reveal className="reveal" style={{ position: "relative", zIndex: 1 }}>
             <div
               style={{
                 display: "inline-flex",

src/components/MembersCarousel.tsx

@@ -89,14 +89,8 @@ export function MembersCarousel({ members }: { members: CarouselMember[] }) {
 
   useEffect(() => {
     if (!canRotate) return;
-    // Respecte la préférence de réduction d'animation.
-    const reduce = window.matchMedia?.("(prefers-reduced-motion: reduce)").matches;
 
     const tick = setInterval(() => {
-      if (reduce) {
-        setStart((s) => (s + VISIBLE) % total);
-        return;
-      }
       // Disparition une à une, puis changement, puis réapparition une à une.
       setVisible(false);
       const outMs = FADE_MS + STAGGER_MS * (VISIBLE - 1);

src/components/StarField.tsx

@@ -0,0 +1,56 @@
+import type { CSSProperties } from "react";
+
+type Star = {
+  top: string;
+  left: string;
+  size: number;
+  color: string;
+  tw: number; // durée scintillement (s)
+  dr: number; // durée dérive (s)
+  delay: number;
+};
+
+// Positions fixes (déterministes) pour éviter tout décalage d'hydratation.
+const STARS: Star[] = [
+  { top: "8%", left: "6%", size: 16, color: "#E0A63C", tw: 3.1, dr: 9, delay: 0 },
+  { top: "18%", left: "22%", size: 10, color: "#6FB0C6", tw: 2.6, dr: 11, delay: 0.6 },
+  { top: "12%", left: "44%", size: 13, color: "#9a6638", tw: 3.6, dr: 8, delay: 1.1 },
+  { top: "26%", left: "63%", size: 11, color: "#2C6FB3", tw: 2.9, dr: 12, delay: 0.3 },
+  { top: "9%", left: "82%", size: 18, color: "#E0A63C", tw: 3.3, dr: 10, delay: 0.9 },
+  { top: "40%", left: "12%", size: 12, color: "#2C6FB3", tw: 3.0, dr: 13, delay: 1.4 },
+  { top: "52%", left: "33%", size: 9, color: "#E0A63C", tw: 2.7, dr: 9.5, delay: 0.2 },
+  { top: "46%", left: "72%", size: 14, color: "#6FB0C6", tw: 3.4, dr: 11.5, delay: 1.7 },
+  { top: "62%", left: "52%", size: 10, color: "#9a6638", tw: 2.8, dr: 10.5, delay: 0.5 },
+  { top: "70%", left: "18%", size: 13, color: "#E0A63C", tw: 3.2, dr: 12.5, delay: 1.0 },
+  { top: "76%", left: "88%", size: 11, color: "#2C6FB3", tw: 3.5, dr: 8.5, delay: 0.7 },
+  { top: "84%", left: "40%", size: 15, color: "#6FB0C6", tw: 3.0, dr: 11, delay: 1.3 },
+  { top: "33%", left: "90%", size: 9, color: "#9a6638", tw: 2.5, dr: 9, delay: 0.4 },
+  { top: "88%", left: "67%", size: 12, color: "#E0A63C", tw: 3.3, dr: 10, delay: 1.6 },
+];
+
+export function StarField({ density = 1, style }: { density?: number; style?: CSSProperties }) {
+  const stars = STARS.slice(0, Math.max(4, Math.round(STARS.length * density)));
+  return (
+    <div className="starfield" aria-hidden style={style}>
+      {stars.map((s, i) => (
+        <span
+          key={i}
+          className="sparkle star"
+          style={
+            {
+              top: s.top,
+              left: s.left,
+              width: s.size,
+              height: s.size,
+              background: s.color,
+              opacity: 0.7,
+              "--tw": `${s.tw}s`,
+              "--dr": `${s.dr}s`,
+              animationDelay: `${s.delay}s, ${s.delay}s`,
+            } as CSSProperties
+          }
+        />
+      ))}
+    </div>
+  );
+}