.pixel-grid { display: grid; gap: 1px; }
.pixel {
  background: #f8f8f8;
  border: 1px solid #ccc;
  width: 16px; height: 16px;
  cursor: pointer;
}
.pixel.active { background: #000; }
.char-item {
  display: inline-block;
  width: 28px;
  text-align: center;
  margin: 2px;
  padding: 4px;
  border: 1px solid #ccc;
  cursor: pointer;
}
.char-item:hover { background: #eee; }
#previewArea canvas {
  image-rendering: pixelated;
}
#loadingOverlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  font-size: 1.5rem;
}