/* Rippling particle wave behind the hero copy and under the phone window.
   It never sits inside the animation frame. */
.wave-field {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.hero-grid { z-index: 2; }