.wormField {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  overflow: hidden;
}

.worm {
  position: absolute;
  width: 144px;
  height: auto;
  will-change: left, top;
}

.wormImg {
  display: block;
  width: 100%;
  height: auto;
  animation: wormWiggle 0.9s steps(1, end) infinite;
}

@keyframes wormWiggle {
  0%, 49% { transform: scaleX(1); }
  50%, 100% { transform: scaleX(-1); }
}