*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;background-color:#000;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#fff}canvas{display:block}#ui-overlay{position:absolute;top:20px;left:20px;pointer-events:none;z-index:10}#ui-overlay h1{font-size:2rem;font-weight:700;text-shadow:0 2px 8px rgba(0,0,0,.8);margin-bottom:5px}#planet-info{font-size:1rem;color:#aaa;text-shadow:0 1px 4px rgba(0,0,0,.8)}#controls-panel{position:absolute;bottom:30px;left:50%;transform:translate(-50%);background:#000000b3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:20px 30px;display:flex;gap:30px;align-items:center;box-shadow:0 8px 32px #00000080;z-index:100}.control-group{display:flex;flex-direction:column;gap:8px}.control-group:first-child{flex-direction:row;gap:12px}.control-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:12px 20px;font-size:1.5rem;cursor:pointer;transition:all .3s ease;color:#fff}.control-btn:hover{background:#fff3;transform:translateY(-2px);box-shadow:0 4px 12px #fff3}.control-btn:active{transform:translateY(0)}.control-group label{font-size:.9rem;color:#ddd;font-weight:500}#speed-value{color:#4caf50;font-weight:700}#speed-slider{width:200px;height:6px;background:#ffffff1a;border-radius:3px;outline:none;cursor:pointer}#speed-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;background:#4caf50;border-radius:50%;cursor:pointer;box-shadow:0 2px 8px #4caf5080}#speed-slider::-moz-range-thumb{width:18px;height:18px;background:#4caf50;border-radius:50%;cursor:pointer;border:none}#info-panel{position:absolute;top:50%;right:30px;transform:translateY(-50%);background:#000000d9;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:30px;min-width:320px;max-width:400px;box-shadow:0 12px 48px #000000b3;z-index:200;transition:all .3s ease}#info-panel.hidden{display:none}#info-panel h2{font-size:1.8rem;margin-bottom:20px;color:#fff;border-bottom:2px solid rgba(255,255,255,.2);padding-bottom:10px}#info-content p{margin-bottom:12px;line-height:1.6;color:#ddd}#info-content strong{color:#4caf50;font-weight:600}#info-description{margin-top:15px;padding-top:15px;border-top:1px solid rgba(255,255,255,.1);font-style:italic;color:#bbb}.close-btn{position:absolute;top:15px;right:15px;background:transparent;border:none;color:#fff;font-size:1.5rem;cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:8px;transition:all .2s ease}.close-btn:hover{background:#ffffff1a;transform:rotate(90deg)}#controls-help{position:absolute;top:20px;right:20px;background:#000000b3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:15px 20px;min-width:200px;z-index:50}#controls-help h3{margin:0 0 10px;font-size:1rem;font-weight:600;color:#fff}#controls-help ul{list-style:none;margin:0;padding:0}#controls-help li{margin-bottom:8px;font-size:.85rem;color:#ddd;line-height:1.4}#controls-help strong{color:#4caf50;font-weight:600}