/* sequence rail + choice layout */
#stage{min-height:240px}
.seq-shell{
  max-width:460px;margin:0 auto;text-align:center;
  padding:.55rem .4rem 1rem;
  background:linear-gradient(165deg,hsl(210 35% 96%),hsl(195 28% 88%));
  border:2px solid hsl(200 35% 55%);
}
.seq-rail{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:.35rem;margin:.35rem 0 .7rem;min-height:3.2rem;
}
.seq-chip{
  min-width:2.6rem;padding:.45rem .65rem;font-weight:900;font-size:1.15rem;
  background:#fff;border:2px solid hsl(200 40% 40%);color:hsl(210 40% 22%);
  font-family:var(--font-display),monospace;
}
.seq-chip.ask{
  background:hsl(42 90% 55%);border-color:#fff;color:#1a1200;
}
.seq-arrow{opacity:.55;font-weight:800;color:hsl(200 30% 35%)}
.seq-prompt{font-size:clamp(1.1rem,4.5vw,1.45rem);line-height:1.4;margin:.4rem 0}
.row{display:flex;flex-wrap:wrap;gap:.45rem;justify-content:center;margin-top:.35rem}
.opt{min-width:4.2rem;min-height:2.4rem;font-weight:800}
.big{font-family:var(--font-display);font-size:clamp(1.5rem,6vw,2.3rem);text-align:center;line-height:1.2}