:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:#050510;color:#fafafa;overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:none}.game-container{position:relative;width:100vw;height:100vh;overflow:hidden;background:#050510}.tunnel{position:absolute;top:0;right:0;bottom:0;left:0;perspective:600px;overflow:hidden}.tunnel-grid{position:absolute;width:200%;height:300%;left:-50%;top:-20%;background-image:repeating-linear-gradient(90deg,transparent,transparent calc(16.66% - 1px),rgba(0,255,255,.06) calc(16.66% - 1px),rgba(0,255,255,.06) 16.66%),repeating-linear-gradient(0deg,transparent,transparent 80px,rgba(0,255,255,.05) 80px,rgba(0,255,255,.05) 81px);transform:rotateX(60deg);transform-origin:center top;animation:gridScroll .8s linear infinite}@keyframes gridScroll{0%{background-position:0 0}to{background-position:0 80px}}.tunnel-wall-left,.tunnel-wall-right{position:absolute;top:0;bottom:0;width:4px;z-index:2}.tunnel-wall-left{left:10%;background:linear-gradient(to bottom,transparent,#0ff,transparent);box-shadow:0 0 20px #0ff,0 0 60px #0ff4}.tunnel-wall-right{right:10%;background:linear-gradient(to bottom,transparent,#f0f,transparent);box-shadow:0 0 20px #f0f,0 0 60px #f0f4}.lane-divider{position:absolute;top:0;bottom:0;width:1px;opacity:.12}.lane-divider:nth-child(1){left:calc(10% + (80% / 3));background:#0ff}.lane-divider:nth-child(2){left:calc(10% + (80% / 3 * 2));background:#0ff}.player{position:absolute;bottom:15%;width:44px;height:52px;z-index:10;transition:left .12s cubic-bezier(.25,.46,.45,.94);filter:drop-shadow(0 0 12px #0ff) drop-shadow(0 0 30px #0ff6)}.player-body{width:100%;height:100%;position:relative}.player-body:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,#0ff,#08f,#04a);clip-path:polygon(50% 0%,100% 70%,85% 100%,15% 100%,0% 70%)}.player-body:after{content:"";position:absolute;bottom:-8px;left:50%;transform:translate(-50%);width:16px;height:20px;background:radial-gradient(ellipse,#0ff 0%,#08f 40%,transparent 70%);animation:enginePulse .15s ease-in-out infinite alternate}@keyframes enginePulse{0%{opacity:.6;height:18px}to{opacity:1;height:26px}}.player.dashing .player-body:before{background:linear-gradient(180deg,#fff,#0ff,#08f);filter:brightness(1.4)}.obstacle{position:absolute;z-index:5;border-radius:4px}.obstacle-block{width:56px;height:32px;background:linear-gradient(135deg,#f05,#f0a);border:1px solid #f5a;box-shadow:0 0 12px #f058,0 0 30px #f054,inset 0 0 15px #f053}.obstacle-wide{width:80px;height:24px;background:linear-gradient(135deg,#fa0,#fd0);border:1px solid #fd5;box-shadow:0 0 12px #fa08,0 0 30px #fa04,inset 0 0 15px #fa03}.obstacle-tall{width:36px;height:56px;background:linear-gradient(135deg,#a0f,#f0f);border:1px solid #c5f;box-shadow:0 0 12px #a0f8,0 0 30px #a0f4,inset 0 0 15px #a0f3}.obstacle:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:repeating-linear-gradient(0deg,transparent,transparent 3px,rgba(255,255,255,.06) 3px,rgba(255,255,255,.06) 4px);border-radius:inherit}.collectible{position:absolute;z-index:5;width:28px;height:28px;border-radius:50%;background:radial-gradient(circle,#0f0 0%,#0a0 60%,transparent 70%);border:2px solid #0f0;box-shadow:0 0 10px #0f08,0 0 25px #0f04;animation:collectSpin .5s linear infinite}@keyframes collectSpin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.particle{position:absolute;width:4px;height:4px;border-radius:50%;pointer-events:none;z-index:15}.hud{position:absolute;top:0;left:0;right:0;z-index:20;display:flex;justify-content:space-between;align-items:flex-start;padding:20px 24px;pointer-events:none}.hud-score{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.1rem;color:#0ff;text-shadow:0 0 10px #0ff8;letter-spacing:.05em}.hud-score span{font-size:1.6rem;font-weight:700}.hud-speed{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;color:#fff6}.hud-multiplier{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1rem;color:#f0f;text-shadow:0 0 10px #f0f8}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#050510d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.overlay-title{font-size:3rem;font-weight:800;letter-spacing:-.02em;margin-bottom:.5rem;background:linear-gradient(135deg,#0ff,#f0f);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:none;filter:drop-shadow(0 0 20px #0ff6) drop-shadow(0 0 40px #f0f4)}.overlay-subtitle{font-size:1rem;color:#ffffff80;margin-bottom:2.5rem;letter-spacing:.12em;text-transform:uppercase;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.overlay-action{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem;letter-spacing:.15em;text-transform:uppercase;color:#0ff;border:1px solid #0ff4;background:#0ff1;padding:.85rem 2.5rem;border-radius:4px;cursor:pointer;pointer-events:all;transition:all .2s;text-shadow:0 0 8px #0ff6}.overlay-action:hover{background:#0ff2;box-shadow:0 0 20px #0ff4}.overlay-action:active{transform:scale(.97)}.game-over-stats{display:flex;flex-direction:column;align-items:center;gap:.75rem;margin-bottom:2rem}.game-over-stats .stat-score{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:3rem;font-weight:800;color:#0ff;text-shadow:0 0 20px #0ff8}.game-over-stats .stat-label{font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:#ffffff59}.game-over-stats .stat-high{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1rem;color:#f0f;text-shadow:0 0 10px #f0f6}.new-high{animation:newHighPulse .6s ease-in-out 3}@keyframes newHighPulse{0%,to{opacity:1}50%{opacity:.4}}.flash-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:50;background:#f05;opacity:0;pointer-events:none;animation:hitFlash .3s ease-out}@keyframes hitFlash{0%{opacity:.4}to{opacity:0}}.speed-line{position:absolute;width:2px;height:60px;background:linear-gradient(to bottom,transparent,rgba(0,255,255,.15),transparent);z-index:1;pointer-events:none}.controls-hint{display:flex;gap:1.5rem;margin-bottom:1rem;opacity:.4}.controls-hint span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:#fff}.controls-hint kbd{display:inline-block;border:1px solid rgba(255,255,255,.2);border-radius:3px;padding:.1rem .4rem;margin-right:.3rem;font-size:.65rem;background:#ffffff0d}@media(max-width:600px){.overlay-title{font-size:2rem}.overlay-subtitle{font-size:.8rem}.hud{padding:12px 16px}.player{width:36px;height:44px;bottom:12%}.obstacle-block{width:48px;height:28px}.obstacle-wide{width:68px;height:20px}.obstacle-tall{width:30px;height:48px}}