*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:#000;color:#fff;height:100vh;margin:0;padding:0;overflow:hidden}.container{position:relative;width:100%;height:100%}header{position:fixed;top:20px;left:50%;transform:translate(-50%);text-align:center;z-index:10;background:#000000b3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:15px 30px;border-radius:15px}header h1{font-size:1.8rem;margin-bottom:5px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}header p{font-size:.9rem;opacity:.9;margin:0}.controls{position:fixed;top:120px;left:20px;z-index:10}.toggle-btn{background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:2px solid rgba(255,255,255,.3);color:#fff;padding:12px;border-radius:50%;cursor:pointer;font-size:1.5rem;width:50px;height:50px;display:flex;align-items:center;justify-content:center;transition:all .3s ease}.toggle-btn:hover{background:#fff3;transform:scale(1.1)}.controls-content{background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:15px;padding:20px;margin-top:10px;display:flex;flex-direction:column;gap:15px;max-width:320px;max-height:0;overflow:hidden;opacity:0;transition:all .3s ease}.controls.expanded .controls-content{max-height:500px;opacity:1}.control-group{display:flex;flex-direction:column;gap:10px;align-items:stretch}.control-group label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:.95rem}input[type=radio]{width:18px;height:18px;cursor:pointer}input[type=range]{width:200px;cursor:pointer}#particle-count-display{display:inline-block;min-width:60px;font-weight:700}button{background:#fff3;border:2px solid rgba(255,255,255,.3);color:#fff;padding:10px 25px;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:700;transition:all .3s ease}button:hover{background:#ffffff4d;transform:translateY(-2px)}button:active{transform:translateY(0)}.canvas-container{position:fixed;top:0;left:0;width:100%;height:100%;background:#000;overflow:hidden;z-index:1}canvas{position:absolute;top:0;left:0;width:100%;height:100%;display:none}canvas.active{display:block}.error-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#f00c;padding:20px;border-radius:10px;display:none;text-align:center;max-width:80%}.error-message.show{display:block}.stats{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:10px;z-index:10;max-width:280px}.stat-card{background:#000c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;padding:12px 18px;text-align:left;display:flex;justify-content:space-between;align-items:center}.stat-card h3{font-size:.8rem;opacity:.8;margin:0;text-transform:uppercase;letter-spacing:1px;font-weight:400}.stat-value{font-size:1.2rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3);margin:0}@media (max-width: 768px){header{top:10px;left:10px;right:10px;transform:none;padding:10px 15px}header h1{font-size:1.3rem}header p{font-size:.8rem}.controls{top:90px;left:10px}.controls-content{max-width:calc(100vw - 60px);padding:15px}.toggle-btn{width:45px;height:45px;font-size:1.3rem}.stats{bottom:10px;right:10px;max-width:calc(100% - 20px)}.stat-card{padding:8px 12px}.stat-card h3{font-size:.7rem}.stat-value{font-size:1rem}}