:root{color:#172033;background:#f7f9fc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{margin:0}a{color:inherit;text-decoration:none}.app-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{display:flex;flex-direction:column;gap:28px;padding:24px;border-right:1px solid #d9e0ea;background:#fff}.sidebar nav{display:grid;gap:10px}.sidebar a{padding:8px 0;color:#475569}.content{padding:32px}.content header p{margin:0 0 6px;color:#64748b}.content h1{margin:0;font-size:28px}.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:28px}.metric-grid article{display:grid;gap:12px;padding:18px;border:1px solid #d9e0ea;border-radius:8px;background:#fff}.metric-grid span{color:#64748b}.metric-grid strong{font-size:28px}@media(max-width:760px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid #d9e0ea}.metric-grid{grid-template-columns:1fr}}