:root{color-scheme:dark;font-family:Google Sans,Product Sans,Arial,Helvetica,sans-serif;background:#0d0d0f}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{width:100%;min-height:100%;margin:0;overflow:hidden;overscroll-behavior:none;touch-action:none;-webkit-user-select:none;user-select:none}body{background:#0d0d0f}#game{position:fixed;top:0;right:0;bottom:0;left:0;overflow:hidden;background:#0d0d0f;color:#d8d8d8;isolation:isolate}.lane{position:absolute;top:0;bottom:0;width:1px;background:#d8d8d80e;z-index:-1}.lane-left{left:37.5%}.lane-right{left:62.5%}#road{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;overflow:hidden;pointer-events:none}.road-marker{position:absolute;width:clamp(26px,7vw,48px);height:1px;background:#d8d8d80f;transform:translate(-50%,-50%)}.road-marker.left{left:37.5%}.road-marker.right{left:62.5%}#rows{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1}.row{position:absolute;left:0;width:100%;height:1px;opacity:.28;will-change:transform,opacity}.glyph{display:block;box-sizing:border-box}.glyph-i{width:clamp(9px,2.1vw,12px);height:clamp(54px,13vw,112px);background:#d8d8d8;border-radius:1px;transition:background-color .18s ease}.glyph-o{width:clamp(54px,13vw,112px);height:clamp(54px,13vw,112px);border:clamp(8px,2.1vw,12px) solid #d8d8d8;border-radius:50%;transition:border-color .18s ease,box-shadow .18s ease}.glyph-o.golden{border-color:#d2aa62;box-shadow:0 0 7px #d2aa6233}.number{position:absolute;top:0;transform:translate(-50%,-50%);color:#d8d8d8e6}.number.left{left:37.5%}.number.right{left:62.5%}.number.success{animation:passed-o-soft .22s ease-out}.number.golden.success{animation:passed-golden-soft .24s ease-out}.row.resolved .glyph-i{background:#d8d8d833}.row.resolved .glyph-o{border-color:#d8d8d833;box-shadow:none}#player{position:absolute;z-index:2;top:var(--player-y, 75%);width:clamp(12px,3vw,18px);height:clamp(76px,18vw,150px);transform:translate(-50%,-50%);background:#d8d8d8;box-shadow:0 0 10px #d8d8d826;transition:left .12s cubic-bezier(.2,.8,.25,1),transform .12s ease;will-change:left,transform}#player.lane-0{left:37.5%}.lane-1{left:62.5%}#player.switching{transform:translate(-50%,-50%) scale(1.16)}#player.crashed{background:#dfa29b;box-shadow:0 0 12px #c2534c75;transform:translate(-50%,-50%) scale(1.1)}.row.crashed .glyph-i{background:#dfa29b;box-shadow:0 0 10px #c2534c61;filter:brightness(1.08)}#hud,#speedometer,#timer{position:absolute;z-index:3;display:grid;gap:5px;opacity:0;transition:opacity .25s;color:#d8d8d86b}#hud,#speedometer{top:max(28px,env(safe-area-inset-top))}#hud{left:max(26px,env(safe-area-inset-left));text-align:left}#hud.show,#speedometer.show,#timer.show{opacity:1}#speedometer{right:max(26px,env(safe-area-inset-right));text-align:right}#timer{bottom:max(28px,env(safe-area-inset-bottom));left:max(26px,env(safe-area-inset-left));text-align:left}#hud span,#speedometer span,#timer span{font-size:9px;font-weight:700;letter-spacing:.2em}#hud strong,#speedometer strong,#timer strong{font-size:clamp(28px,8vw,42px);font-weight:600;line-height:.85;letter-spacing:-.05em;color:#d8d8d8c2}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:5;display:grid;place-items:center;background:#0d0d0f;opacity:0;pointer-events:none;transition:opacity .28s ease}.overlay.is-visible{opacity:1;pointer-events:auto}.game-over .overlay{background:#0d0d0f8f}.overlay-copy{text-align:center;transform:translateY(-3vh)}.logo{height:clamp(40px,10vw,68px);margin:0 0 40px;display:flex;align-items:center;justify-content:center;gap:13px}.logo-glyph.glyph-i{width:clamp(6px,1.5vw,9px);height:clamp(40px,10vw,68px)}.logo-glyph.glyph-o{width:clamp(40px,10vw,68px);height:clamp(40px,10vw,68px);border-width:clamp(6px,1.5vw,9px)}.logo-slash{font-size:clamp(32px,8vw,54px);font-weight:300;color:#d8d8d89e}p{margin:0}.rule{font-size:14px;line-height:1.85;letter-spacing:.18em;color:#d8d8d894}.rule strong{color:#d8d8d8;font-size:1.25em}.inline-glyph{display:inline-block;vertical-align:-.22em}.inline-glyph.glyph-i{width:3px;height:1.15em}.inline-glyph.glyph-o{width:1.15em;height:1.15em;border-width:3px}.prompt{margin-top:42px;font-size:11px;font-weight:700;letter-spacing:.22em;color:#d8d8d85c;animation:breathe 1.4s ease-in-out infinite alternate}.action-button{min-width:188px;min-height:54px;margin-top:42px;padding:0 24px;border:1px solid rgba(216,216,216,.68);border-radius:0;background:transparent;color:#d8d8d8;cursor:pointer;font:inherit;font-size:11px;font-weight:700;letter-spacing:.22em;pointer-events:auto;touch-action:manipulation}.action-button:hover,.action-button:focus-visible{background:#d8d8d8;color:#0d0d0f;outline:none}.action-button:active{transform:scale(.97)}.countdown{min-width:1.5em;color:#d8d8d8;font-size:clamp(88px,25vw,180px);font-weight:700;line-height:.8;letter-spacing:-.08em}.game-over .overlay-copy{animation:impact .28s cubic-bezier(.1,.8,.3,1)}.score-label{margin-bottom:8px;color:#d8d8d861;font-size:11px;font-weight:700;letter-spacing:.22em}.final-score{font-size:clamp(70px,20vw,150px);font-weight:700;line-height:.8;letter-spacing:-.1em}.best{margin-top:24px;font-size:12px;letter-spacing:.16em;color:#d8d8d880}@keyframes passed-o-soft{0%{transform:translate(-50%,-50%) scale(1)}45%{transform:translate(-50%,-50%) scale(1.08);filter:brightness(1.08)}to{transform:translate(-50%,-50%) scale(1)}}@keyframes passed-golden-soft{0%{transform:translate(-50%,-50%) scale(1);box-shadow:0 0 7px #d2aa6233}45%{transform:translate(-50%,-50%) scale(1.1);filter:brightness(1.12);box-shadow:0 0 12px #d2aa6252}to{transform:translate(-50%,-50%) scale(1);box-shadow:0 0 7px #d2aa6233}}@keyframes breathe{0%{opacity:.32}to{opacity:.8}}@keyframes passed-o{0%{transform:translate(-50%,-50%) scale(1);filter:brightness(1);box-shadow:0 0 #fff0}45%{transform:translate(-50%,-50%) scale(1.13);filter:brightness(1.3);box-shadow:0 0 18px #ffffff7a}to{transform:translate(-50%,-50%) scale(1);filter:brightness(1);box-shadow:0 0 #fff0}}@keyframes passed-golden{0%{transform:translate(-50%,-50%) scale(1);filter:brightness(1);box-shadow:0 0 12px #f2c75c59}45%{transform:translate(-50%,-50%) scale(1.17);filter:brightness(1.35);box-shadow:0 0 24px #ffd867cc}to{transform:translate(-50%,-50%) scale(1);filter:brightness(1);box-shadow:0 0 12px #f2c75c59}}@keyframes impact{0%{transform:translate(0)}25%{transform:translate(-10px)}50%{transform:translate(9px)}75%{transform:translate(-4px)}to{transform:translate(0)}}