:root{color-scheme:light;font-family:Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{margin:0;background:#f4f6f9;color:#1a202c}.app-layout{display:flex;min-height:100vh}.sidebar{width:220px;background:#111827;color:#f9fafb;padding:24px 16px;display:flex;flex-direction:column;gap:24px}.sidebar .brand{font-size:1.1rem;margin:0}.sidebar nav{display:flex;flex-direction:column;gap:8px}.sidebar nav a{color:#d1d5db;text-decoration:none;padding:8px 12px;border-radius:6px}.sidebar nav a.active,.sidebar nav a:hover{background:#2563eb;color:#fff}.app-content{flex:1;padding:32px}.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin:16px 0 32px}.metric-card{background:#fff;border-radius:10px;padding:16px;box-shadow:0 1px 3px #00000014;display:flex;flex-direction:column;gap:4px}.metric-label{color:#6b7280;font-size:.85rem}.metric-value{font-size:1.6rem;font-weight:600}.chart-container{background:#fff;border-radius:10px;padding:16px;box-shadow:0 1px 3px #00000014}.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden}.data-table th,.data-table td{text-align:left;padding:10px 14px;border-bottom:1px solid #e5e7eb;font-size:.9rem}.error-banner{background:#fee2e2;color:#991b1b;padding:10px 14px;border-radius:8px;margin-bottom:16px}.alerts-banner{background:#fef3c7;color:#92400e;padding:10px 14px;border-radius:8px;margin-bottom:16px}