feat: implement global CSS styling and create AudioPlayer component

frontend/src/components/AudioPlayer.tsx

@@ -105,17 +105,43 @@ export default function AudioPlayer({ episode, onClose, userId, mode = 'floating
         />
 
         {/* Glow backdrop */}
-        <div className="absolute top-0 right-0 w-64 h-64 bg-[var(--accent-glow)] blur-[80px] -mr-32 -mt-32 pointer-events-none" />
+        <div className={`absolute top-0 right-0 w-64 h-64 bg-[var(--accent-glow)] blur-[80px] -mr-32 -mt-32 pointer-events-none transition-opacity duration-700 ${isPlaying ? 'animate-aura opacity-100' : 'opacity-40'}`} />
 
         <div className="relative z-10 flex flex-col lg:flex-row gap-8 items-start lg:items-center">
           {/* Artwork */}
           <div className="relative shrink-0">
+            {/* Halo aura derrière l'artwork */}
+            {isPlaying && (
+              <div
+                className="absolute inset-0 rounded-[var(--radius-card)] bg-[var(--accent-primary)]/20 blur-xl animate-aura scale-110 pointer-events-none -z-10"
+                aria-hidden="true"
+              />
+            )}
             <div className="w-36 h-36 lg:w-44 lg:h-44 rounded-[var(--radius-card)] overflow-hidden shadow-2xl border border-[var(--border-color)]">
               {(episode.imageUrl || podcast?.imageUrl)
-                ? <img src={episode.imageUrl || podcast!.imageUrl} alt="" className="w-full h-full object-cover" />
+                ? <img
+                    src={episode.imageUrl || podcast!.imageUrl}
+                    alt=""
+                    className={`w-full h-full object-cover transition-all duration-500 ${isPlaying ? 'animate-spin-slow' : 'animate-spin-slow animate-spin-paused'}`}
+                  />
                 : <div className="w-full h-full bg-gradient-to-br from-[var(--accent-primary)] to-[var(--accent-secondary)] flex items-center justify-center text-5xl">🎙️</div>
               }
             </div>
+            {/* Barres égaliseur */}
+            {isPlaying && (
+              <div
+                className="absolute -bottom-1 -left-1 flex items-end gap-[3px] px-2 py-1.5 rounded-xl bg-[var(--bg-primary)]/70 backdrop-blur-sm border border-[var(--border-color)]"
+                aria-hidden="true"
+              >
+                {[0, 150, 300, 100].map((delay, i) => (
+                  <span
+                    key={i}
+                    className="block w-[3px] h-4 rounded-full bg-[var(--accent-primary)] animate-eq-bar opacity-90"
+                    style={{ animationDelay: `${delay}ms` }}
+                  />
+                ))}
+              </div>
+            )}
             {isPlaying && (
               <div className="absolute -bottom-2 -right-2 px-3 py-1 rounded-full bg-[var(--accent-primary)] text-white text-[9px] font-black uppercase tracking-widest shadow-glow-indigo animate-pulse">
                 En cours

frontend/src/styles/globals.css

@@ -243,8 +243,18 @@ h1, h2, h3, h4 {
 .animate-aura       { animation: aura-pulse 10s ease-in-out infinite; }
 .animate-glow-beat  { animation: glow-beat  3s ease-in-out infinite; }
 .animate-spin-slow  { animation: spin-slow  10s linear infinite; }
+.animate-spin-paused { animation-play-state: paused; }
 .animate-ping-slow  { animation: ping-slow  2.5s cubic-bezier(0, 0, 0.2, 1) infinite; }
 
+@keyframes eq-bar {
+  0%, 100% { transform: scaleY(0.25); }
+  50%       { transform: scaleY(1); }
+}
+.animate-eq-bar {
+  animation: eq-bar 0.9s ease-in-out infinite;
+  transform-origin: bottom;
+}
+
 /* ── Shimmer loading skeleton ── */
 .shimmer {
   background: linear-gradient(