body{margin:0;font-family:Arial,sans-serif;background:#f4f6f9}.container{display:flex;min-height:100vh}.sidebar{width:220px;background:#111827;color:#fff;padding:20px;display:flex;flex-direction:column}.sidebar h2{margin-bottom:30px}.sidebar a{color:#fff;text-decoration:none;margin-bottom:15px}.logout{margin-top:auto;background:#ef4444;border:none;padding:10px;color:#fff;cursor:pointer}.main{flex:1;padding:40px}.card{background:#fff;padding:20px;border-radius:8px;margin-bottom:20px;box-shadow:0 4px 10px #0000000d}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.stat{background:#1f2937;color:#fff;padding:20px;border-radius:8px}