/* 反應速度測試 */
.rt-stage { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; min-height: 280px; padding: 20px; border-radius: 14px; text-align: center; cursor: pointer; user-select: none; -webkit-user-select: none; touch-action: manipulation; color: #fff; }
.rt-stage strong { font-size: 2rem; line-height: 1.3; }
.rt-stage span { font-size: 1rem; opacity: .95; }
.rt-stage:focus { outline: 3px solid #93b4ff; outline-offset: 3px; }
.rt-idle { background: var(--brand); }
.rt-wait { background: #c0392b; }
.rt-go { background: #16a34a; }
.rt-early { background: #b45309; }
.rt-show { background: var(--brand-dark); }
.rt-stage.rt-go strong { font-size: 2.6rem; }
.rt-list { margin: 12px 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 8px; }
.rt-list li { border: 1px solid var(--line); border-radius: 10px; padding: 6px 10px; background: #fff; font-size: .95rem; text-align: center; }
.rt-list li b { display: block; font-size: 1.2rem; color: var(--brand-dark); }
.rt-list li.best { border-color: var(--ok); background: #ecfdf5; }
.rt-sum { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.rt-sum .total-box strong { font-size: 1.6rem; }
.rt-h3 { font-size: 1.05rem; margin: 1rem 0 .4rem; }
@media (max-width: 480px) {
  .rt-stage { min-height: 240px; }
  .rt-sum { grid-template-columns: 1fr; }
}