.dashboard {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 60px 1fr;
  height: 100vh;
}

.topbar  { grid-column: 1 / -1; border-bottom: 1px solid var(--border); }
.sidebar { border-right: 1px solid var(--border); overflow-y: auto; }
.content { overflow-y: auto; padding: 2rem; }

/* Collapsed sidebar */
.dashboard.collapsed { grid-template-columns: 64px 1fr; }