.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 128 128' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
  opacity: 0.18;
}
/* Feedback slider: a real horizontal scroller (swipe / drag / wheel / keys)
   that JS gently auto-drifts and loops. Works as a plain scroller without JS. */
.feedback-marquee {
  width: 100vw;
  margin-left: calc(50% - 50vw);
}
.feedback-viewport {
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  padding: 4px 0 12px; /* room for the offset shadow + focus ring */
  cursor: grab;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 5%, #000 95%, transparent);
  mask-image: linear-gradient(to right, transparent, #000 5%, #000 95%, transparent);
}
.feedback-viewport::-webkit-scrollbar { display: none; }
.feedback-viewport.is-dragging { cursor: grabbing; user-select: none; }
.feedback-viewport.is-dragging .feedback-thumb { pointer-events: none; }
.feedback-track,
.feedback-set {
  display: flex;
  gap: 0.65rem;
  flex-shrink: 0;
}
.feedback-track { width: max-content; padding: 0 0.65rem; }
.feedback-thumb {
  flex: 0 0 auto;
  width: min(42vw, 11.5rem);
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feedback-thumb img { -webkit-user-drag: none; user-select: none; }
@media (hover: hover) {
  .feedback-thumb:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 0 #0a0a0a;
  }
}
@media (prefers-reduced-motion: reduce) {
  .feedback-thumb { transition: none; }
}