*{box-sizing:border-box}html,body,#app{margin:0;width:100%;height:100%;overflow:hidden;background:#000}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overscroll-behavior:none}#scene{position:fixed;inset:0;width:100%;height:100%;border:0;background:#000}#loading{position:fixed;inset:0;z-index:5;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:#090909;color:#fff;font-size:16px}.spinner{width:42px;height:42px;border:3px solid #444;border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.hidden{display:none!important}#fallback{position:fixed;z-index:10;inset:0;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(0,0,0,.94)}.card{width:min(420px,100%);padding:28px;border-radius:20px;background:#111;color:#fff;text-align:center;border:1px solid #333}.card h2{margin:0 0 10px}.card p{color:#aaa;line-height:1.5}button{width:100%;padding:14px;border:0;border-radius:12px;margin-top:10px;font-size:15px;font-weight:700;cursor:pointer}button:not(.secondary){background:#fff;color:#000}button.secondary{background:#222;color:#fff;border:1px solid #444}#install{position:fixed;z-index:20;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));width:auto;padding:11px 16px;background:#fff;color:#000}