/* Image Splitter — tool-specific styles (loaded after the shared design
   system in /css/styles.css). Piece-grid preview + slider controls that
   don't already have a shared rule. */

.range-input {
  flex: 1;
  min-width: 160px;
  accent-color: var(--brand);
}

/* Piece preview grid: aspect-ratio mirrors the source image so equal `1fr`
   tracks approximate the (near-equal, integer-rounded) real piece sizes. */
.piece-grid {
  display: grid;
  gap: 4px;
  background: var(--line);
  border-radius: 10px;
  padding: 4px;
  /* Cap both dimensions: 560px wide normally, but for tall/portrait sources
     shrink by height (78vh) instead so the preview never forces a wall of
     scrolling. */
  width: min(560px, calc(78vh * var(--ar, 1)));
  max-width: 100%;
  margin: 0 auto;
  aspect-ratio: var(--ar, 1);
}
.piece-grid.is-grid {
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
}
.piece-grid.is-carousel {
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: 1fr;
  gap: 2px;
}

.piece {
  position: relative;
  overflow: hidden;
  background: #f3f4f6;
  border-radius: 3px;
}
.piece-canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.piece-label {
  position: absolute;
  top: 4px;
  left: 4px;
  background: rgba(17, 24, 39, 0.65);
  color: #fff;
  font-size: 0.66rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 6px;
  pointer-events: none;
}
.piece-dl {
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  /* Faint by default rather than fully invisible: hover-capability detection
     is unreliable on some touch/hybrid hardware, and this button must stay
     discoverable either way. Hover/focus brings it to full visibility. */
  opacity: 0.55;
  transition: opacity 0.12s;
}
.piece:hover .piece-dl,
.piece:focus-within .piece-dl {
  opacity: 1;
}

.piece-count {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 8px;
}

@media (max-width: 560px) {
  .piece-grid {
    max-width: 100%;
  }
}