:root{color-scheme:light}*{box-sizing:border-box}html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#12202c;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,sans-serif;touch-action:none;-webkit-user-select:none;user-select:none}#app{width:100%;height:100%}#stage{position:relative;width:100%;height:100%;touch-action:none}#game-canvas{display:block;width:100%;height:100%;background:#12202c}#hud{position:absolute;top:0;left:0;right:0;display:flex;flex-direction:column;align-items:center;padding:14px 12px;pointer-events:none;color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.45)}#score{font-size:42px;font-weight:800;line-height:1;transition:transform 80ms ease-out}#score.pop{animation:score-pop .22s ease-out}@keyframes score-pop{0%{transform:scale(1)}40%{transform:scale(1.28)}to{transform:scale(1)}}#subhud{margin-top:4px;font-size:14px;opacity:.85;display:flex;gap:12px}#coins.pop{animation:score-pop .22s ease-out}#idle-hint{position:absolute;left:0;right:0;bottom:18%;text-align:center;color:#fff;font-size:18px;font-weight:700;text-shadow:0 1px 4px rgba(0,0,0,.5);pointer-events:none;animation:idle-hint-pulse 1.4s ease-in-out infinite}#idle-hint.hidden{display:none}@keyframes idle-hint-pulse{0%,to{opacity:.55}50%{opacity:1}}#tuning-label{position:absolute;left:8px;bottom:6px;font-size:10px;letter-spacing:.04em;color:#fff;opacity:.35;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.5)}#mute-btn{position:absolute;top:12px;right:12px;width:40px;height:40px;border-radius:50%;border:none;background:#00000059;color:#fff;font-size:18px;line-height:1;touch-action:manipulation}#overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:#0a10169e;color:#fff;text-align:center;padding:24px;animation:overlay-in .22s cubic-bezier(.18,.89,.32,1.28)}#overlay.hidden{display:none}@keyframes overlay-in{0%{opacity:0;transform:translateY(-16px)}to{opacity:1;transform:translateY(0)}}#overlay-title{font-size:30px;font-weight:800;letter-spacing:.06em}#overlay-score{font-size:16px;opacity:.9}#retry-btn{margin-top:12px;padding:12px 28px;font-size:16px;font-weight:700;color:#12202c;background:#fff;border:none;border-radius:999px;touch-action:manipulation}