*{box-sizing:border-box}body{margin:0;font-family:Pretendard,system-ui,sans-serif;background:#f5f7ff;color:#171c2a}body[data-game=green-light]{background:#152b24;color:#fff}nav{height:64px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #0001}nav a{color:inherit;text-decoration:none;font-weight:750}main{max-width:520px;margin:auto;padding:28px 22px 48px;text-align:center}h1{font-size:clamp(36px,9vw,48px);line-height:1.18;letter-spacing:-.035em;margin:30px 0;font-weight:850;word-break:keep-all}h1 span{color:#245bdf}.eyebrow{font-size:13px;letter-spacing:.04em;opacity:.8}.intro{font-size:17px;line-height:1.75;word-break:keep-all}.note{font-size:13px;line-height:1.7;opacity:.72}button{font:inherit;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline:3px solid #ffbb31;outline-offset:5px}.primary,.secondary{display:block;width:100%;min-height:58px;border:0;border-radius:12px;font-weight:750;font-size:17px;margin:14px 0;padding:14px}.primary{background:#245bdf;color:#fff}[data-game=green-light] .primary{background:#b5ff63;color:#152b24}.secondary{background:transparent;color:inherit;border:1.5px solid #a5adbd}[data-game=green-light] .secondary{border-color:#719a84}.traffic{display:flex;gap:14px;justify-content:center;width:max-content;margin:35px auto;background:#0b1712;padding:18px;border-radius:60px}.traffic i{width:62px;height:62px;border-radius:50%;background:#334e40}.traffic i:first-child{background:#f06e69}.traffic i:last-child{background:#b5ff63;box-shadow:0 0 30px #b5ff6340}.game-top{display:flex;justify-content:space-between;font-size:16px;margin:6px 0 28px}.signal{width:100%;min-height:420px;min-height:min(60svh,480px);border:2px solid #52765f;border-radius:24px;background:#1b3629;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:25px}.signal strong{font-size:42px}.signal .bulb{width:100px;height:100px;border-radius:50%;background:#f06e69}.signal.go{background:#b5ff63;color:#152b24;border-color:#b5ff63}.signal.go .bulb{background:#152b24}.number{font-size:clamp(68px,18vw,100px);font-weight:850;line-height:1.2;margin:40px 0}.number small{font-size:28px;margin-left:8px}.attempts{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.attempts span{display:flex;flex-direction:column;padding:10px;font-size:12px;background:#ffffff0d;border-radius:8px}.attempts b{font-size:16px;margin-top:4px}.other{display:block;color:inherit;margin:26px 0;font-weight:650}.demo{margin:38px 0}.demo b{display:block;font-size:90px;letter-spacing:-.06em}.demo span{font-size:16px;display:block;margin-top:12px}.prompt{font-size:18px;margin:36px 0 0}.color-word{font-size:clamp(80px,23vw,110px);font-weight:850;line-height:1.5;margin:15px 0 35px}.color-options{display:grid;grid-template-columns:1fr 1fr;gap:14px}.color-options button{min-height:76px;background:#fff;border:2px solid #d2d9e9;border-radius:14px;color:#171c2a;font-size:21px;font-weight:750}.color-options button:disabled{opacity:.5}.color-options button.correct{opacity:1;border-color:#245bdf;background:#e7eeff}.feedback{min-height:30px;font-weight:700}progress{width:100%;height:6px;accent-color:#245bdf}#share-status{font-size:14px;min-height:24px}