:root{color-scheme:dark;font-family:Segoe UI,system-ui,-apple-system,sans-serif;line-height:1.5}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;overflow:hidden;background:#050510;color:#fff;-webkit-user-select:none;user-select:none;touch-action:none}.app,.game-container{width:100%;height:100%;position:relative}.game-canvas{display:block;width:100%;height:100%}.hud{position:absolute;top:0;left:0;right:0;padding:16px 20px;pointer-events:none;z-index:10}.hud-top{display:flex;justify-content:space-between;align-items:flex-start}.hud-score,.hud-coins{background:#00000080;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:12px;padding:8px 16px;border:1px solid rgba(255,255,255,.1)}.hud-label{display:block;font-size:10px;font-weight:600;letter-spacing:.15em;color:#ffffff80;text-transform:uppercase}.hud-value{display:block;font-size:22px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}.hud-coins{display:flex;align-items:center;gap:8px}.coin-icon{color:gold;font-size:20px}.hud-speed{margin-top:8px;display:flex;justify-content:center}.speed-bar{width:120px;height:4px;background:#ffffff1a;border-radius:2px;overflow:hidden}.speed-fill{height:100%;background:linear-gradient(90deg,#0fa,#f0f);border-radius:2px;transition:width .3s ease}.hud-powerups{margin-top:10px;display:flex;gap:8px;justify-content:center}.powerup-badge{display:flex;flex-direction:column;align-items:center;gap:4px;padding:6px 12px;border-radius:8px;font-size:14px;font-weight:700;border:1px solid}.powerup-magnet{background:#f0f3;border-color:#f0f;color:#f0f}.powerup-multiplier{background:#0cf3;border-color:#0cf;color:#0cf}.powerup-shield{background:#0f83;border-color:#0f8;color:#0f8}.powerup-timer{width:40px;height:3px;background:#ffffff26;border-radius:2px;overflow:hidden}.powerup-timer-fill{height:100%;background:currentColor;border-radius:2px;transition:width .1s linear}.controls-hint{position:absolute;bottom:20px;left:50%;transform:translate(-50%);background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:6px 16px;border-radius:20px;font-size:12px;color:#fff6;pointer-events:none;z-index:10}.screen{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:20}.start-screen{background:linear-gradient(135deg,#0a001a,#1a0033 30%,#0d1b2a 70%,#050510)}.gameover-screen{background:#000000d9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.screen-content{text-align:center;padding:32px;max-width:400px;width:90%}.logo-container{margin-bottom:32px}.game-title{font-size:3rem;font-weight:900;line-height:1;letter-spacing:-.02em}.title-speed{display:block;background:linear-gradient(90deg,#0fa,#0cf);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.title-surfers{display:block;background:linear-gradient(90deg,#f0f,#f80);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.game-subtitle{font-size:1rem;font-weight:600;letter-spacing:.4em;color:#fff6;margin-top:8px}.start-info{margin-bottom:24px}.high-score-display{display:inline-flex;align-items:center;gap:10px;background:#ffffff0d;padding:8px 20px;border-radius:10px;border:1px solid rgba(255,255,255,.08)}.hs-label{font-size:11px;font-weight:600;letter-spacing:.15em;color:#fff6}.hs-value{font-size:20px;font-weight:700;color:gold}.btn{display:inline-block;padding:16px 48px;border:none;border-radius:14px;font-size:1.1rem;font-weight:700;letter-spacing:.08em;cursor:pointer;transition:transform .15s,box-shadow .15s;text-transform:uppercase}.btn:hover{transform:scale(1.04)}.btn:active{transform:scale(.97)}.btn-start{background:linear-gradient(135deg,#0fa,#0cf);color:#000;box-shadow:0 0 30px #00ffaa4d,0 4px 15px #0000004d;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 0 30px #00ffaa4d,0 4px 15px #0000004d}50%{box-shadow:0 0 50px #00ffaa80,0 4px 20px #0006}}.btn-restart{background:linear-gradient(135deg,#f0f,#f80);color:#fff;box-shadow:0 0 30px #ff00ff4d,0 4px 15px #0000004d}.controls-info{margin-top:32px;display:flex;justify-content:center;gap:20px}.control-item{display:flex;flex-direction:column;align-items:center;gap:4px}.control-key{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:#ffffff14;border:1px solid rgba(255,255,255,.15);border-radius:8px;font-size:18px;color:#ffffffb3}.control-desc{font-size:11px;color:#ffffff59}.powerup-info{margin-top:28px;text-align:left}.info-heading{font-size:11px;font-weight:600;letter-spacing:.15em;color:#ffffff4d;margin-bottom:10px;text-align:center}.info-row{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:13px;color:#ffffff8c}.pu-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;font-size:12px;font-weight:700;flex-shrink:0}.pu-magnet{background:#f0f3;color:#f0f;border:1px solid rgba(255,0,255,.4)}.pu-multiplier{background:#0cf3;color:#0cf;border:1px solid rgba(0,204,255,.4)}.pu-shield{background:#0f83;color:#0f8;border:1px solid rgba(0,255,136,.4)}.gameover-title{font-size:2.5rem;font-weight:900;background:linear-gradient(90deg,#f35,#f80);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px}.new-highscore-badge{display:inline-block;padding:6px 20px;background:linear-gradient(90deg,gold,#f80);color:#000;font-size:13px;font-weight:700;letter-spacing:.1em;border-radius:20px;margin-bottom:20px;animation:glow 1.5s ease-in-out infinite}@keyframes glow{0%,to{box-shadow:0 0 10px #ffd70066}50%{box-shadow:0 0 25px #ffd700b3}}.score-card{background:#ffffff0d;border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px 24px;margin-bottom:24px}.score-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0}.score-label{font-size:14px;color:#ffffff80}.score-value{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}.score-value.best{color:gold}.score-divider{height:1px;background:#ffffff14;margin:4px 0}@media(max-width:480px){.game-title{font-size:2.2rem}.game-subtitle{font-size:.85rem;letter-spacing:.3em}.btn{padding:14px 36px;font-size:1rem}.controls-info{gap:14px}.control-key{width:36px;height:36px;font-size:16px}.hud-value{font-size:18px}}