*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f3f6fb;color:#1f2937}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-card{width:380px;background:#fff;padding:28px;border-radius:14px;box-shadow:0 10px 35px rgba(0,0,0,.08)}input,select{width:100%;padding:11px;margin:7px 0 14px;border:1px solid #d1d5db;border-radius:8px}button,.btn{display:inline-block;background:#2563eb;color:white;border:0;border-radius:8px;padding:10px 15px;text-decoration:none;cursor:pointer}.btn.secondary{background:#475569}.btn.danger{background:#dc2626}.layout{display:flex;min-height:100vh}.sidebar{width:250px;background:#0f172a;color:#fff;padding:20px}.sidebar h2{font-size:20px}.sidebar a{display:block;color:#cbd5e1;text-decoration:none;padding:11px;border-radius:8px;margin:4px 0}.sidebar a:hover{background:#1e293b;color:#fff}.main{flex:1;padding:24px}.topbar{display:flex;justify-content:space-between;background:#fff;padding:15px;border-radius:12px;margin-bottom:18px;box-shadow:0 2px 10px rgba(0,0,0,.04)}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:15px}.card{background:#fff;padding:18px;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,.04)}.card h3{margin:0 0 8px}.num{font-size:32px;font-weight:bold}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}.table th,.table td{padding:12px;border-bottom:1px solid #e5e7eb;text-align:left}.status{padding:4px 9px;border-radius:999px;font-size:12px}.online{background:#dcfce7;color:#166534}.offline{background:#fee2e2;color:#991b1b}.alert{padding:12px;border-radius:8px;margin-bottom:12px}.error{background:#fee2e2}.success{background:#dcfce7}.form-card{background:#fff;padding:18px;border-radius:12px;margin-bottom:16px}
