:root {
  color-scheme: light;
  font-family: "DM Sans", "Avenir Next", system-ui, sans-serif;
  color: #123b3a;
  background: #effaf8;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.68)),
    #effaf8;
}

.toolbar {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 22px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid rgba(18, 59, 58, 0.14);
  background: rgba(239, 250, 248, 0.94);
  backdrop-filter: blur(14px);
}

.title-group h1 {
  margin: 0;
  font-size: clamp(25px, 3vw, 38px);
  line-height: 1;
  letter-spacing: -0.045em;
}

.title-group p {
  margin: 8px 0 0;
  color: #536e6b;
  font-size: 14px;
}

.controls {
  display: flex;
  align-items: flex-end;
  gap: 16px;
}

.segmented-control {
  display: flex;
  gap: 4px;
  min-width: 0;
  margin: 0;
  padding: 4px;
  border: 1px solid rgba(18, 59, 58, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.segmented-control legend {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.segmented-control label {
  cursor: pointer;
}

.segmented-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-control span {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: #536e6b;
  font-size: 13px;
  font-weight: 650;
  line-height: 18px;
  white-space: nowrap;
}

.segmented-control input:checked + span {
  color: #ffffff;
  background: #087d79;
}

.segmented-control input:focus-visible + span {
  outline: 3px solid rgba(8, 125, 121, 0.3);
  outline-offset: 2px;
}

.stabilize-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  padding: 5px 6px 5px 5px;
  border: 1px solid rgba(18, 59, 58, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.stabilize-toggle input {
  width: 15px;
  height: 15px;
  margin: 0;
  accent-color: #087d79;
}

.stabilize-toggle span {
  color: #536e6b;
  font-size: 13px;
  font-weight: 650;
  line-height: 18px;
  white-space: nowrap;
}

main {
  padding: clamp(24px, 4vw, 56px);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 24px);
}

.card {
  min-width: 0;
}

.sprite-shell {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 1;
  border: 1px solid rgba(18, 59, 58, 0.12);
  border-radius: 18px;
  background:
    linear-gradient(45deg, rgba(18, 59, 58, 0.035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(18, 59, 58, 0.035) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(18, 59, 58, 0.035) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(18, 59, 58, 0.035) 75%),
    rgba(255, 255, 255, 0.78);
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-size: 16px 16px;
}

.sprite {
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-position: var(--frame-x, 0%) var(--frame-y, 0%);
  background-size: 400% 300%;
  opacity: 0;
  transition: opacity 160ms ease;
}

.card.is-ready .sprite {
  opacity: 1;
}

.loading {
  position: absolute;
  color: #536e6b;
  font-size: 13px;
}

.card.is-ready .loading {
  display: none;
}

.card-meta {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 2px 4px;
  color: #536e6b;
  font-size: 12px;
}

.asset-index {
  flex: 0 0 auto;
  color: #087d79;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
}

.asset-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.error {
  max-width: 640px;
  margin: 48px auto;
  padding: 18px 20px;
  border: 1px solid #b42318;
  border-radius: 12px;
  color: #7a271a;
  background: #fef3f2;
}

@media (max-width: 1040px) {
  .toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .controls {
    align-items: stretch;
    flex-direction: column;
    width: 100%;
  }

  .segmented-control {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .segmented-control span {
    text-align: center;
  }

  .gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 430px) {
  .gallery {
    grid-template-columns: 1fr;
  }
}