:root{--primary: #2563eb;--primary-dark: #1d4ed8;--bg: #f7f9fc;--card-bg: #ffffff;--border: #e5e9f0;--text: #1a1f2b;--text-muted: #667085;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary);text-decoration:none}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--card-bg);border-right:1px solid var(--border);padding:20px 12px;flex-shrink:0}.sidebar h1{font-size:18px;padding:0 12px 20px}.sidebar nav a{display:block;padding:10px 12px;border-radius:8px;color:var(--text);font-size:14px;margin-bottom:2px}.sidebar nav a.active,.sidebar nav a:hover{background:#eef2ff;color:var(--primary)}.main{flex:1;padding:24px 32px;max-width:1400px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px;margin-bottom:24px}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.stat-card .label{font-size:13px;color:var(--text-muted);margin-bottom:6px}.stat-card .value{font-size:26px;font-weight:700}.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:#eef2ff;color:var(--primary)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase}.btn{background:var(--primary);color:#fff;border:none;padding:10px 16px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600}.btn:hover{background:var(--primary-dark)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef2ff,#f7f9fc)}.login-card{background:#fff;padding:40px;border-radius:14px;box-shadow:0 10px 40px #141e3c14;width:360px}.login-card input{width:100%;padding:10px 12px;margin-bottom:12px;border:1px solid var(--border);border-radius:8px;font-size:14px}.error-text{color:var(--danger);font-size:13px;margin-bottom:12px}@media (max-width: 768px){.app-shell{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border)}.main{padding:16px}}