.app-shell{background:var(--bg);height:100vh;font-family:var(--font-sans);grid-template-columns:248px 1fr;display:grid;overflow:hidden}@media (max-width:1024px){.app-shell{grid-template-columns:1fr}}.app-topbar{border-bottom:1px solid var(--line);background:var(--bg);align-items:center;gap:12px;padding:14px 28px;display:flex}.app-main{background:var(--bg);flex:1;min-height:0;padding:28px 36px;overflow-y:auto}.onboarding-shell{background:var(--bg);grid-template-columns:320px 1fr;min-height:100vh;display:grid}@media (max-width:1024px){.onboarding-shell{grid-template-columns:1fr}}.mc-table th{position:sticky;top:0}