.sprite-intro {
  padding: 56px 0 8px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, var(--lighter-background), var(--background) 70%);
}

.sprite-intro h1 {
  color: var(--foreground);
  font-size: 2rem;
  margin-bottom: 8px;
}

.sprite-panel {
  padding: 40px 0 80px;
}

.sprite-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.sprite-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--light-foreground);
  font-size: 0.85rem;
}

.sprite-field input[type="text"],
.sprite-field input[type="number"] {
  background: var(--dark-background);
  color: var(--foreground);
  border: 1px solid var(--muted);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 0.95rem;
}

.sprite-field input:focus {
  outline: none;
  border-color: var(--accent);
}

#name-input {
  width: 220px;
}

.sprite-field-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sprite-field-row input[type="number"] {
  width: 80px;
}

.sprite-field-unit {
  color: var(--muted);
  font-size: 0.85rem;
}

.sprite-workspace {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: flex-start;
}

.sprite-canvas-col {
  flex: 1 1 360px;
  min-width: 0;
}

.sprite-canvas-wrap {
  background: #000;
  border: 1px solid var(--muted);
  border-radius: 10px;
  padding: 10px;
  overflow: auto;
  max-width: 100%;
}

#grid-canvas {
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.sprite-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.sprite-actions button,
.sprite-output-actions button {
  background: var(--lighter-background);
  color: var(--foreground);
  border: 1px solid var(--muted);
  border-radius: 999px;
  padding: 8px 18px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.sprite-actions button:hover,
.sprite-output-actions button:hover {
  border-color: var(--accent);
  transform: scale(1.04);
}

.sprite-toggle[aria-pressed="true"] {
  background: var(--accent);
  color: var(--dark-background);
  border-color: var(--accent);
}

.sprite-side-col {
  flex: 0 1 220px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sprite-side-label {
  display: block;
  color: var(--light-foreground);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 8px;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
}

.palette-swatch {
  position: relative;
  aspect-ratio: 1;
  border-radius: 6px;
  border: 2px solid var(--muted);
  cursor: pointer;
  padding: 0;
}

.palette-swatch:hover {
  border-color: var(--light-foreground);
}

.palette-swatch.is-selected {
  border-color: var(--foreground);
  box-shadow: 0 0 0 1px var(--foreground);
}

.palette-swatch.is-reserved::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 4px;
  /* mix-blend-mode inverts the stripe against whatever color sits under it,
     so it reads clearly on a near-black swatch (navy) and a pale one
     (yellow) alike, instead of a fixed dark stripe that vanishes on navy. */
  mix-blend-mode: difference;
  background:
    linear-gradient(45deg, transparent 42%, #ffffff 42%, #ffffff 58%, transparent 58%);
}

.sprite-truesize-wrap {
  background: #000;
  border: 1px solid var(--muted);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
}

#truesize-canvas {
  image-rendering: pixelated;
}

.sprite-output {
  margin-top: 32px;
}

#output-line {
  width: 100%;
  resize: vertical;
  background: var(--dark-background);
  color: var(--foreground);
  border: 1px solid var(--muted);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  word-break: break-all;
}

#output-line:focus {
  outline: none;
  border-color: var(--accent);
}

.sprite-output-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.sprite-output-status {
  margin-top: 10px;
  color: var(--teal);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .sprite-side-col {
    flex: 1 1 100%;
  }
}