/* Thumbnail geometry mirrors DeepSeek Chat's composer rail: 64px cards with a
   16px radius, remove control fully inside the card, arrows overlaid at the
   edges instead of a scrollbar. */

.root {
  position: relative;
  min-width: 0;
}

.rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  /* Edge arrows page the overflow; the scrollbar stays hidden (both engines). */
  scrollbar-width: none;
  /* The rail scrolls on the composer's elevated input surface: bind the l2
     pair (ui-theme styles/scrollbar.css rebinding contract) so anything that
     does draw a thumb here matches the surface. */
  --dsh-scrollbar-thumb: var(--dsw-alias-scrollbar-bg-l2);
  --dsh-scrollbar-thumb-hover: var(--dsw-alias-scrollbar-hover-l2);
}

.rail::-webkit-scrollbar {
  display: none;
}

.item {
  position: relative;
  flex: 0 0 64px;
  width: 64px;
  height: 64px;
}

.thumbnail {
  width: 64px;
  height: 64px;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--dsw-alias-border-l2-darkmode-thin);
  border-radius: 16px;
  background: var(--dsw-alias-interactive-bg-hover);
  cursor: zoom-in;
}

.thumbnail img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.remove {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--dsw-alias-button-contrast-fill);
  color: var(--dsw-alias-label-primary-inverted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease-in-out;
}

.item:hover .remove,
.remove:focus-visible {
  opacity: 1;
}

/* Touch surfaces have no hover to reveal the control. */
@media (pointer: coarse) {
  .remove {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .remove {
    transition: none;
  }
}

.arrow {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--dsw-alias-border-l2-darkmode-thin);
  border-radius: 999px;
  background: var(--dsw-specific-input-major);
  color: var(--dsw-alias-label-secondary);
  box-shadow: var(--dsw-shadow-lv2);
  cursor: pointer;
  transform: translateY(-50%);
}

.arrow:hover {
  background: var(--dsw-alias-interactive-bg-hover-solid);
}

.arrowLeft {
  left: 4px;
}

.arrowRight {
  right: 4px;
}
