*{margin:0;padding:0;box-sizing:border-box}body{font-family:Quicksand,PingFang SC,system-ui,sans-serif;background:linear-gradient(135deg,#0b0b2b,#1a1a4e,#0f0f2a);min-height:100vh;color:#f0f0ff;overflow:hidden}.app-container{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:20px;width:100%}.cloud-badge{position:absolute;top:12px;right:16px;font-size:14px;color:#a0a0cc;background:#a0a0cc26;padding:4px 12px;border-radius:20px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid rgba(160,160,204,.2)}.start-screen{gap:20px;text-align:center}.start-screen h1{font-size:42px;font-weight:800;background:linear-gradient(90deg,#ff6b35,#ff9f43,#ff6b35);-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-shadow:0 0 30px rgba(255,107,53,.4);letter-spacing:2px}.subtitle{font-size:18px;color:#b0b0dd}.car-select{background:#ffffff0a;padding:16px 24px;border-radius:20px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1)}.select-label{margin-bottom:12px;font-size:16px;color:#cce}.car-options{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.car-btn{padding:10px 20px;border:2px solid transparent;border-radius:30px;background:#ffffff0f;color:#e0e0ff;font-size:16px;cursor:pointer;transition:all .2s}.car-btn.selected{border-color:#ff6b35;background:#ff6b3526;box-shadow:0 0 20px #ff6b354d}.car-btn.locked{opacity:.4;cursor:not-allowed}.high-score{font-size:18px;color:#fc6;background:#ffcc661a;padding:8px 20px;border-radius:30px}.start-btn{display:flex;align-items:center;gap:8px;padding:14px 40px;font-size:20px;border:none;border-radius:50px;background:linear-gradient(135deg,#ff6b35,#ff4500);color:#fff;font-weight:700;cursor:pointer;box-shadow:0 6px 20px #ff6b3566;transition:transform .2s}.controls-hint{font-size:14px;color:#8080aa}.playing-screen{padding:0;justify-content:flex-start}.game-canvas{display:block;width:100%;height:calc(100vh - 120px);max-width:800px}.hud{position:absolute;top:10px;left:10px;display:flex;flex-wrap:wrap;gap:10px;padding:8px 12px;background:#00000080;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:16px;border:1px solid rgba(255,255,255,.1)}.hud-item{display:flex;align-items:center;gap:6px;font-size:14px;color:#e0e0ff;white-space:nowrap}.hud-item span{display:inline-block}.touch-controls{position:absolute;bottom:16px;left:0;right:0;display:flex;justify-content:center}.touch-row{display:flex;gap:16px}.touch-btn{width:64px;height:64px;border-radius:50%;background:#ffffff14;border:2px solid rgba(255,255,255,.15);color:#fff;display:flex;align-items:center;justify-content:center;font-size:28px;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:background .1s}.touch-btn:active{background:#ff6b354d}.drift-btn{background:#ff6b3533;border-color:#ff6b35;font-size:14px;font-weight:700}.gameover-screen{gap:24px;text-align:center}.gameover-screen h1{font-size:48px;color:#ff4747;text-shadow:0 0 30px #ff4747}.final-score{font-size:20px;display:flex;flex-direction:column;gap:8px;background:#ffffff0f;padding:20px 40px;border-radius:24px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.final-score span{font-size:32px;font-weight:800;color:#fc0}.new-record{color:#fc0;font-weight:700;animation:pulse 1s infinite}.gameover-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.restart-btn,.share-btn{display:flex;align-items:center;gap:8px;padding:12px 30px;border:none;border-radius:50px;font-size:18px;font-weight:700;cursor:pointer;transition:transform .2s}.restart-btn{background:linear-gradient(135deg,#4ecdc4,#2ecc71);color:#0a0a2e}.share-btn{background:linear-gradient(135deg,#6c5ce7,#a29bfe);color:#fff}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}