.spiral-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#gr rect { fill: none; stroke: #E10600; stroke-width: 1; }
#ga path { fill: none; stroke: #0A0A0A; stroke-width: 1.7; }

/* the nautilus shell, hidden until scrolling up zooms in on the pole */
#shell {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  transform-origin: 65.27% 63.88%;
  will-change: transform, opacity;
}