:root{color:#1f2328;background:#fff;font-family:system-ui,Segoe UI,Roboto,sans-serif;font-size:14px}body{margin:0}.app-header{border-bottom:1px solid #d0d7de;padding:8px 16px;font-weight:600}.hub{padding:16px}.hub h1{margin:0 0 8px;font-size:18px}.hub-empty{color:#59636e;margin:0}