.rc-tool{gap:1rem;max-width:820px;margin:1.5rem auto 3rem;padding:0 1rem;display:grid}.rc-panel{border:1px solid var(--border,#e2e2e2);border-radius:1rem;gap:.75rem;padding:1rem 1.25rem 1.25rem;display:grid}.rc-panel h2,.rc-panel h3{margin:0}.rc-panel h2{font-size:1.05rem}.rc-panel h3{font-size:.95rem}.rc-modes{flex-wrap:wrap;gap:.5rem;display:flex}.rc-modes .button{min-height:44px}.rc-modes .is-on{outline:2px solid var(--focus,#1a73e8);outline-offset:2px}.rc-row{flex-wrap:wrap;align-items:end;gap:1rem;display:flex}.rc-actions{flex-wrap:wrap;gap:.5rem;display:flex}.rc-actions .button{min-height:44px}.rc-arena{text-align:center;cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:manipulation;border:2px solid var(--border,#b9b9b9);background:var(--surface,#f6f6f6);border-radius:.9rem;place-items:center;min-height:200px;padding:2.5rem 1rem;font-size:1.3rem;font-weight:700;transition:background-color .12s ease-out,border-color .12s ease-out;display:grid}.rc-arena.is-waiting{color:#fff;background:#b3261e;border-color:#b3261e}.rc-arena.is-stimulus{color:#fff;background:#1e7e34;border-color:#1e7e34}.rc-arena.is-early,.rc-arena.is-timeout{color:#fff;background:#5f3dc4;border-color:#5f3dc4}.rc-arena.is-answered{color:#fff;background:#0b7285;border-color:#0b7285}.rc-arena:focus-visible{outline:3px solid var(--focus,#1a73e8);outline-offset:3px}.rc-go,.rc-big-arrow{font-size:2.5rem;line-height:1.2}.rc-nogo{font-size:2rem;line-height:1.2}.rc-lights-wrap{justify-items:center;gap:.75rem;font-size:1.1rem;display:grid}.rc-lights{gap:.6rem;display:flex}.rc-lights span{opacity:.35;border:2px solid;border-radius:50%;width:44px;height:44px;transition:opacity .15s ease-out,background-color .15s ease-out}.rc-lights span[data-on=true]{opacity:1;background:currentColor}.rc-choice-grid{grid-template-columns:repeat(4,minmax(44px,1fr));gap:.5rem;display:grid}.rc-choice-btn{min-height:56px;font-size:1.6rem}.rc-choice-btn[data-active=true]{outline:3px solid var(--focus,#1a73e8);outline-offset:2px}.rc-stats{flex-wrap:wrap;gap:1rem;margin:0;padding:0;list-style:none;display:flex}.rc-stats li{gap:.15rem;min-width:110px;display:grid}.rc-stats span{opacity:.75;font-size:.8rem}.rc-stats strong{font-variant-numeric:tabular-nums;font-size:1.4rem}.rc-tally{flex-wrap:wrap;gap:.4rem;margin:0;padding:0;list-style:none;display:flex}.rc-tally li{border:1px solid var(--border,#ddd);font-variant-numeric:tabular-nums;border-radius:.5rem;padding:.25rem .6rem}.rc-history{flex-wrap:wrap;gap:.4rem;margin:0;padding:0;list-style:none;display:flex}.rc-history li{border:1px solid var(--border,#ddd);font-variant-numeric:tabular-nums;border-radius:.5rem;padding:.25rem .6rem}.rc-history li[data-outcome=hit]{border-color:#1e7e34}.rc-history li[data-outcome=early],.rc-history li[data-outcome=false-alarm],.rc-history li[data-outcome=wrong-key]{border-color:#b3261e}.rc-history li[data-outcome=timeout],.rc-history li[data-outcome=omission]{border-color:#e67700}.rc-hint,.rc-tip{opacity:.85;margin:0;font-size:.92rem}@media (prefers-reduced-motion:reduce){.rc-arena,.rc-lights span{transition:none}}@media (max-width:480px){.rc-arena{min-height:170px;font-size:1.1rem}.rc-lights span{width:36px;height:36px}}