feat: polish motion with stronger easing, press feedback and reduced motion

- Override Tailwind ease-out/ease-in-out with stronger curves, add ease-drawer
- hoverOnlyWhenSupported so hover styles never stick on touch devices
- Replace transition-all with explicit properties across the public UI
- Press feedback via active:scale-[0.97] instead of hover:scale-105
- Global prefers-reduced-motion handling (CSS + MotionConfig reducedMotion="user")
- Mobile menu is a real drawer: stays mounted, inert when closed, Escape closes
- Progress and music bars animate scaleX/scaleY instead of width/height
- Fix undefined animate-spin-slow, contain hero CTA shine with overflow-hidden

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/globals.css

@@ -25,6 +25,11 @@
     --input: #efebe9;
     --ring: #a1887f; /* Warm brown ring */
     --radius: 1rem;
+
+    /* Motion tokens: enter/exit = ease-out, on-screen movement = ease-in-out */
+    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
+    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
+    --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
 }
 
 .dark {
@@ -74,6 +79,20 @@ html {
     scroll-behavior: smooth;
 }
 
+/* Reduced motion: drop movement, keep colour/opacity feedback */
+@media (prefers-reduced-motion: reduce) {
+    html {
+        scroll-behavior: auto;
+    }
+    *,
+    *::before,
+    *::after {
+        animation-duration: 0.01ms !important;
+        animation-iteration-count: 1 !important;
+        animation-delay: 0ms !important;
+    }
+}
+
 /* Liquid Glass Effects */
 .glass-panel {
     background: var(--card);
@@ -92,10 +111,13 @@ html {
     box-shadow:
         0 4px 6px -1px rgba(0, 0, 0, 0.06),
         0 2px 4px -1px rgba(0, 0, 0, 0.05);
-    transition: all 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
-    will-change: transform, box-shadow;
+    transition:
+        transform 250ms var(--ease-out),
+        box-shadow 250ms var(--ease-out),
+        border-color 200ms ease;
 }
 
+@media (hover: hover) and (pointer: fine) {
 .glass-card:hover {
     background: var(--card);
     box-shadow:
@@ -104,6 +126,7 @@ html {
     transform: translateY(-4px);
     border-color: var(--ring);
 }
+}
 
 /* Typography & Headings */
 h1,
@@ -229,7 +252,7 @@ div {
     background: #fffcf5;
     border: 1px solid #d7ccc8;
     color: #3e2723;
-    transition: all 0.2s ease;
+    transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
     box-shadow: 0 1px 2px rgba(62, 39, 35, 0.05);
 }