.hg {
  --hg-accent: #14685f;
  --hg-ink: #23362c;
  --hg-muted: #5b6d63;
  --hg-surface: #fafbf8;
  --hg-raised: #fff;
  --hg-line: #d9e2dc;
  --hg-shadow: 18 44 34;

  --hg-card-min: 200px;
  --hg-gap: 1.1rem;
  --hg-overlay-opacity: 1;

  --hg-tile-bleed: 1;
  --hg-reach: .46;
  --hg-depth: 230px;
  --hg-spread: 45;
  --hg-perspective: 620px;
  --hg-tile-move: .14s;
  --hg-wave: 420ms;

  --hg-settle-hold: 50ms;
  --hg-settle-step: 90ms;
  --hg-settle-wave: 420ms;
  --hg-settle-move: .2s;

  margin: 2rem 0;
  padding: 1.25rem;
  border: 1px solid var(--hg-line);
  border-radius: 14px;
  background: var(--hg-surface);
  color: var(--hg-ink);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
  box-sizing: border-box;

  isolation: isolate;
}

.hg * {
  box-sizing: border-box;
}

.hg-kicker {
  margin: 0 0 .9rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--hg-muted);
}

.hg figcaption {
  margin-top: 1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--hg-line);
  text-align: left;
  color: var(--hg-muted);
  font-size: .8rem;
}

.hg-controls {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.6rem;
  align-items: center;
  margin: 0 0 1.1rem;
  font-size: .83rem;
  color: var(--hg-muted);
}

.hg-control-slider,
.hg-control-toggle {
  display: flex;
  gap: .55rem;
  align-items: center;
  flex: 1 1 15rem;
  min-width: 12rem;
  font-weight: 400;
  white-space: nowrap;
}

.hg-control-toggle {
  flex: 0 0 auto;
  min-height: 40px;
  cursor: pointer;
}

.hg-control-slider input[type=range] {
  flex: 1 1 5rem;
  min-width: 5rem;
  min-height: 40px;
  accent-color: var(--hg-accent);
}

.hg-control-slider output {
  color: var(--hg-muted);
  font-variant-numeric: tabular-nums;
  min-width: 2.6rem;
  text-align: right;
}

.hg-control-toggle input[type=checkbox] {
  width: 17px;
  height: 17px;
  accent-color: var(--hg-accent);
}

.hg :is(input, select, button):focus-visible {
  outline: 3px solid var(--hg-accent);
  outline-offset: 3px;
}

.hg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--hg-card-min), 1fr));
  gap: var(--hg-gap);
}

.hg-grid[data-cols] {
  grid-template-columns: repeat(var(--hg-cols), minmax(0, 1fr));
}

.hg-card {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.hg-stack {
  position: relative;
  width: 100%;
  aspect-ratio: 1;

  content-visibility: auto;
  border-radius: 10px;
  overflow: hidden;
  background: #eef1ec;
  box-shadow: 0 1px 2px rgb(var(--hg-shadow) / .15), 0 0 0 1px rgb(var(--hg-shadow) / .1) inset;
  transition: box-shadow .25s ease;

  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
}

.hg-card:hover .hg-stack,
.hg-card:focus-within .hg-stack {
  box-shadow: 0 14px 26px -14px rgb(var(--hg-shadow) / .5), 0 0 0 1px rgb(var(--hg-shadow) / .16) inset;
}

.hg-stack img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  object-fit: contain;
}

.hg-stack .hg-overlay {
  opacity: var(--hg-overlay-opacity);
  transition: opacity .15s ease;
}

.hg-stack .hg-overlay {
  image-rendering: pixelated;
}

.hg-stack .hg-overlay[data-rendering="auto"] {
  image-rendering: auto;
}

.hg-card-label {
  margin: 0;
  padding: 0 .1rem;
  color: var(--hg-muted);
  font-size: .78rem;
  text-align: center;
}

.hg-stack.hg-tiled .hg-overlay {
  opacity: 0;
}

.hg-tiles {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  grid-template: repeat(var(--hg-n), 1fr) / repeat(var(--hg-n), 1fr);
  opacity: var(--hg-overlay-opacity);
  image-rendering: pixelated;
}

.hg-tiles[data-rendering="auto"] {
  image-rendering: auto;
}

.hg-tile {

  margin: 0 -1px -1px 0;
  background-image: var(--hg-map);
  background-size: calc(var(--hg-n) * (100% - 1px)) calc(var(--hg-n) * (100% - 1px));
  background-repeat: no-repeat;

  transform: scale(var(--hg-tile-bleed));
  transition:
    transform var(--hg-tile-move) cubic-bezier(.3, .9, .3, 1),
    opacity var(--hg-tile-move) ease;
}

.hg-tiles:not([data-rendering="auto"]) > .hg-tile {
  background-size: calc(var(--hg-n) * 100%) calc(var(--hg-n) * 100%);
}

.hg-tiles.hg-wave .hg-tile {
  transition-delay: calc(var(--d, 0) * var(--hg-wave));
}

.hg-tiles.hg-settling .hg-tile {
  transition-duration: var(--hg-settle-move);
  transition-delay:
    calc(var(--hg-settle-hold) + var(--hg-i, 0) * var(--hg-settle-step)
      + var(--d, 0) * var(--hg-settle-wave));
}

.hg-tiles.hg-instant .hg-tile {
  transition: none;
}

.hg-stack.hg-armed :is(.hg-overlay, .hg-tiles) {
  opacity: 0;
}

.hg-help {
  margin: .9rem 0 0;
  font-size: .78rem;
  color: var(--hg-muted);
}

@media (hover: none) {
  .hg-control-toggle:has(.hg-reveal-toggle) {
    display: none;
  }
}

@media (max-width: 640px) {
  .hg {
    padding: 1rem;
  }

  .hg-grid,
  .hg-grid[data-cols] {
    --hg-card-min: 150px;
    grid-template-columns: repeat(auto-fit, minmax(var(--hg-card-min), 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {

  .hg-stack,
  .hg-stack .hg-overlay,
  .hg-tile {
    transition: none;
  }

  .hg-stack.hg-armed .hg-tiles,
  .hg-stack.hg-armed:not(.hg-tiled) .hg-overlay {
    opacity: var(--hg-overlay-opacity);
  }
}

@media print {

  .hg-controls {
    display: none;
  }

  .hg-stack.hg-armed .hg-tiles,
  .hg-stack.hg-armed:not(.hg-tiled) .hg-overlay {
    opacity: var(--hg-overlay-opacity);
  }

  .hg {
    break-inside: avoid;
  }
}