body {
      background-color: #f0f2f5;
    }

    .navbar-brand {
      font-weight: bold;
      color: #1877f2 !important;
    }

    .sidebar {
      background-color: #fff;
      border-right: 1px solid #ddd;
      min-height: 100vh;
      padding-top: 1rem;
    }

    .sidebar a {
      display: block;
      padding: 8px 12px;
      color: #333;
      text-decoration: none;
      font-size: 0.95rem;
    }

    .sidebar a:hover {
      background-color: #f0f0f0;
    }

    .content-area {
      padding: 1rem;
    }

    .card {
      margin-bottom: 1.5rem;
    }

    @media (max-width: 768px) {
      .sidebar {
        border-right: none;
        min-height: auto;
      }

      .sidebar a {
        display: inline-block;
        padding: 0.5rem 0.75rem;
      }
    }