html,body,#app{width:100%;height:100%;margin:0;overflow:hidden;background:#020617;color:white;font-family:Arial}
#viewer{position:absolute;inset:0}
header{position:absolute;top:20px;left:50%;transform:translateX(-50%);z-index:5;padding:20px 35px;border-radius:30px;background:#001b2dcc;border:1px solid cyan;box-shadow:0 0 30px cyan;text-align:center;font-size:35px}
header small{display:block;font-size:14px}
.panel{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:10px;flex-wrap:wrap}
button{padding:12px 18px;border-radius:20px;background:#0066ffcc;color:white;border:1px solid cyan}