/* Neon Doodle — minimal shell: fullscreen canvas, no scroll/select */
html, body {
  margin: 0; padding: 0;
  background: #0a0a18;
  overflow: hidden;
  height: 100%;
}
canvas {
  display: block;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  cursor: crosshair;
}