html,body{margin:0;width:100%;height:100%;overflow:hidden;font-family:Arial,sans-serif}model-viewer{width:100vw;height:100vh;background:#f5f5f5}.toolbar{position:fixed;top:12px;left:12px;z-index:1000;display:flex;gap:8px;align-items:center}.btn,.select{background:rgba(255,255,255,.94);border:1px solid #bbb;border-radius:6px;padding:8px 12px;font-size:13px;color:#333}.btn{text-decoration:none;cursor:pointer}.status{position:fixed;top:58px;left:12px;z-index:1000;max-width:min(620px,calc(100vw - 48px));padding:9px 12px;border-radius:6px;background:rgba(255,255,255,.94);box-shadow:0 2px 8px rgba(0,0,0,.15);font-size:13px}.status.error{color:#8b0000;border:1px solid #d99}.fatal{padding:20px;font-family:Arial,sans-serif;color:#8b0000}#logo{position:fixed;left:2vw;bottom:2vw;z-index:1000}#logo img{width:clamp(200px,12vw,600px);height:auto}