body{margin:0;font-family:Arial,sans-serif;background-color:#fff;color:#333}header{color:#000;padding:10px 20px;display:flex;justify-content:space-between;align-items:center}#hero{width:100%;height:100vh;overflow:hidden}body{margin:0;overflow:hidden}canvas{display:block;width:100%;height:100%}#preloader{position:fixed;top:0;left:0;width:100%;height:100%;background:#000;display:flex;justify-content:center;align-items:center;z-index:9999}.spinner{border:6px solid #f3f3f3;border-top:6px solid #3498db;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite}#progress-bar{width:0%;height:5px;background:#3498db;transition:width .3s ease}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}#loadingMessage{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:18px;color:#fff;background:#000c;padding:15px;border-radius:10px;text-align:center;box-shadow:0 4px 20px #00000080;z-index:1000;display:none}