#umf-app{display:flex;gap:30px}#folder-ui{width:300px;border-right:1px solid #ccc}#folder-ui ul{list-style:none;padding-left:20px}#folder-ui li{margin:4px 0}.folder-item{cursor:pointer;font-weight:500}#media-ui{flex:1;padding-left:20px}.folder-item{cursor:pointer;padding:5px}.folder-item.selected{background-color:#e3f2fd;border-left:3px solid #2196f3}