*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#0a0a1a,#1a1a3a);color:#fff;overflow:hidden;height:100vh;width:100vw}#app{width:100%;height:100%;position:relative}.screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;justify-content:center;align-items:center;transition:opacity .3s ease}.screen.hidden{display:none}.menu-content{text-align:center;padding:40px;max-width:500px}.title{font-size:4rem;font-weight:700;background:linear-gradient(90deg,#ff6b6b,#ffd93d,#6bcb77,#4d96ff,#9b59b6);background-size:300% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradient-shift 3s ease infinite;margin-bottom:10px;text-shadow:0 0 30px rgba(255,255,255,.3)}@keyframes gradient-shift{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.subtitle{font-size:1.5rem;color:#888;margin-bottom:40px}.file-input-container{margin-bottom:20px}input[type=file]{display:none}.file-label{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50px;cursor:pointer;font-size:1.1rem;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.file-label:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.file-label .icon{font-size:1.5rem}.file-name{margin-top:10px;color:#888;font-size:.9rem}.url-input-container{margin-bottom:30px}.or-divider{color:#555;margin:20px 0;font-size:.9rem}.url-input{width:100%;padding:12px 20px;border:2px solid #333;border-radius:10px;background:#ffffff0d;color:#fff;font-size:1rem;margin-bottom:10px;transition:border-color .3s ease}.url-input:focus{outline:none;border-color:#667eea}.url-input::placeholder{color:#555}.btn{padding:15px 40px;border:none;border-radius:50px;font-size:1.1rem;cursor:pointer;transition:all .3s ease;display:inline-block;margin:5px}.btn-primary{background:linear-gradient(135deg,#00c9ff,#92fe9d);color:#000;font-weight:700;box-shadow:0 4px 15px #00c9ff66}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #00c9ff99}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#ffffff1a;color:#fff;border:2px solid rgba(255,255,255,.2)}.btn-secondary:hover{background:#fff3;border-color:#fff6}.controls-info{margin-top:40px;padding:20px;background:#ffffff0d;border-radius:15px;text-align:left}.controls-info h3{margin-bottom:15px;color:#aaa;font-size:1rem;text-transform:uppercase;letter-spacing:2px}.controls-info p{margin:8px 0;color:#888;font-size:.95rem}.key{display:inline-block;padding:4px 10px;background:#ffffff1a;border-radius:5px;font-family:monospace;font-size:.9rem;margin-right:5px}.loading-content{text-align:center}.loading-content h2{margin-bottom:30px;font-size:2rem}.loading-bar{width:300px;height:8px;background:#ffffff1a;border-radius:4px;overflow:hidden;margin-bottom:20px}.loading-progress{height:100%;width:0%;background:linear-gradient(90deg,#00c9ff,#92fe9d);border-radius:4px;transition:width .3s ease}#loading-status{color:#888;font-size:.9rem}#game-screen{background:#000}#game-canvas{width:100%;height:100%;display:block}#game-ui{position:absolute;top:0;left:0;width:100%;padding:20px;pointer-events:none;display:flex;justify-content:space-between;align-items:flex-start}.score-container,.multiplier-container{background:#00000080;padding:15px 25px;border-radius:10px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.score-label,.multiplier-label{display:block;font-size:.75rem;color:#888;text-transform:uppercase;letter-spacing:2px;margin-bottom:5px}#score{font-size:2rem;font-weight:700;background:linear-gradient(90deg,#00c9ff,#92fe9d);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}#multiplier{font-size:1.8rem;font-weight:700;color:#ffd93d}.progress-container{position:absolute;bottom:20px;left:50%;transform:translate(-50%);width:60%;height:6px;background:#ffffff1a;border-radius:3px;overflow:hidden}.song-progress{height:100%;width:0%;background:linear-gradient(90deg,#667eea,#764ba2);border-radius:3px;transition:width .1s linear}.overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000c;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:20px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.overlay.hidden{display:none}.overlay h2{font-size:3rem;margin-bottom:20px}.gameover-content{text-align:center;padding:40px}.gameover-content h1{font-size:3rem;margin-bottom:30px;background:linear-gradient(90deg,#ffd93d,#ff6b6b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.final-score{margin-bottom:30px}.final-score .score-label{font-size:1rem;color:#888;margin-bottom:10px;display:block}#final-score{font-size:4rem;font-weight:700;background:linear-gradient(90deg,#00c9ff,#92fe9d);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stats{display:flex;justify-content:center;gap:40px;margin-bottom:40px}.stat{text-align:center}.stat-label{display:block;font-size:.85rem;color:#888;margin-bottom:5px}.stat span:not(.stat-label){font-size:1.5rem;font-weight:700;color:#fff}@media(max-width:768px){.title{font-size:2.5rem}.subtitle{font-size:1.2rem}.stats{flex-direction:column;gap:20px}.menu-content{padding:20px}#game-ui{padding:10px}.score-container,.multiplier-container{padding:10px 15px}#score{font-size:1.5rem}}