*{margin:0;padding:0}html,body{overflow:hidden}#bg-video-container{position:fixed;top:0;left:0;width:100%;height:100%;display:flex;z-index:-1}#bg-video-container video{width:50%;height:100%;object-fit:fill;filter:saturate(1.6) contrast(1.2)}@media(max-width:768px){#bg-video-container video:last-child{display:none}#bg-video-container video{width:100%}}.webgl{position:fixed;top:0;left:0;outline:none}#sound-popup{position:fixed;bottom:32px;left:50%;transform:translate(-50%);background:#000000bf;color:#fff;padding:16px 24px;border-radius:12px;display:flex;align-items:center;gap:12px;z-index:10;font-family:sans-serif;font-size:15px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}#sound-popup button{padding:6px 16px;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:700}#sound-yes{background:#fff;color:#000}#sound-no{background:transparent;color:#aaa;border:1px solid #555}