.app-shell { display: grid; grid-template-columns: var(--sidebar-width) 1fr; min-height: 100vh; }
.main-section { min-width: 0; display: grid; grid-template-rows: var(--navbar-height) 1fr; }
.app-content { padding: 24px; overflow: auto; }
.page-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }