.app{width:100vw;height:100vh;overflow:hidden;background:#f0f0f0}.add-btn{position:fixed;top:10px;left:10px;padding:8px 12px;background-color:#3b82f6;color:#fff;border-radius:6px;border:none;cursor:pointer;z-index:1000}.panel{position:absolute;width:200px;background:#fff;border:1px solid #ccc;border-radius:8px;box-shadow:0 3px 6px #0000001a;padding-bottom:10px}.panel-header{background:#3b82f6;color:#fff;padding:8px;border-radius:8px 8px 0 0;cursor:grab}.panel-body{padding:10px}.menu-dropdown{position:absolute;top:60px;left:0}