: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;-webkit-text-stroke:1.5px rgba(18,32,44,.55);text-stroke:1.5px rgba(18,32,44,.55)}#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}@keyframes idle-hint-pulse{0%,to{opacity:.55}50%{opacity:1}}#help-card{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:16px;text-align:center;color:#fff;pointer-events:none;text-shadow:0 1px 4px rgba(0,0,0,.55)}#help-card.hidden{display:none}#help-card-full{box-sizing:border-box;display:flex;flex-direction:column;align-items:center;gap:8px;width:min(92vw,340px);padding:14px 16px;background:#0a101666;border-radius:20px}.help-title{font-size:18px;font-weight:800;letter-spacing:.04em}.help-car{font-size:26px;line-height:1}.help-rules{display:flex;flex-direction:column;align-items:center;gap:4px;width:100%}.help-rule{font-size:clamp(13px,4.6vw,19px);font-weight:800;line-height:1.3;white-space:nowrap}.help-sub{font-size:13px;opacity:.82;line-height:1.5}.help-sub p{margin:0}#help-card-compact{display:none;font-size:16px;font-weight:700;background:#0a101666;border-radius:999px;padding:8px 18px}#help-card-tap{font-size:18px;font-weight:700;animation:idle-hint-pulse 1.4s ease-in-out infinite}#help-card.help-compact{justify-content:flex-end;padding-bottom:14%;gap:8px}#help-card.help-compact #help-card-full{display:none}#help-card.help-compact #help-card-compact{display:block}#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)}#coach-hint{position:absolute;top:30%;left:50%;transform:translate(-50%,-50%);font-size:22px;font-weight:800;color:#fff;background:#ff8f28e0;padding:10px 22px;border-radius:999px;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.4);z-index:5}#coach-hint.hidden{display:none}#icon-buttons{position:absolute;top:12px;right:12px;display:flex;gap:8px}#help-btn,#mute-btn{width:40px;height:40px;border-radius:50%;border:none;background:#00000059;color:#fff;font-size:18px;font-weight:700;line-height:1;touch-action:manipulation}#help-btn.hidden{display:none}#overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#0a101673;color:#fff;text-align:center;padding:24px}#overlay.hidden{display:none}#overlay-card{display:flex;flex-direction:column;align-items:center;gap:10px;padding:26px 30px;background:#12202cc7;border:1px solid rgba(255,255,255,.18);border-radius:24px;box-shadow:0 12px 30px #00000059;animation:overlay-in .22s cubic-bezier(.18,.89,.32,1.28)}@keyframes overlay-in{0%{opacity:0;transform:translateY(-16px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}#overlay-title{font-size:28px;font-weight:800;letter-spacing:.06em}#overlay-score{font-size:16px;opacity:.92}#overlay-bestdiff{font-size:14px;font-weight:700;color:#ffd54a;min-height:1em}#retry-btn{margin-top:8px;padding:12px 28px;font-size:16px;font-weight:700;color:#12202c;background:#fff;border:none;border-radius:999px;touch-action:manipulation}