.app{height:100%;display:flex;flex-direction:column}
.topbar{height:56px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 14px;background:#16202a}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:10px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-sub{font-size:12px;color:var(--muted)}
.main {
  display: grid;
  grid-template-columns: 320px 1fr;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}