@media(max-width:999px) and (prefers-reduced-motion:no-preference){
  .problem-list .problem-stage{isolation:isolate;overflow:visible;align-items:start}
  .problem-list .problem-stage .problem-item{
    position:sticky;
    top:min(90px,calc(100svh - var(--mobile-card-height,600px) - 24px));
    z-index:var(--mobile-card-order,1);
    align-self:start;
    background:#fff;
    box-shadow:0 -8px 24px #10254b0a;
  }
}