body {
      font-family: 'Segoe UI', sans-serif;
      margin: 0;
      background: #f1f3f5;
    }

    .sidebar {
      width: 240px;
      background-color: #212529;
      color: white;
      height: 100vh;
      position: fixed;
      padding: 20px;
    }

    .sidebar h2 {
      font-size: 22px;
      margin-bottom: 30px;
    }

    .sidebar a {
      display: block;
      color: #dee2e6;
      text-decoration: none;
      margin-bottom: 15px;
      transition: 0.3s;
    }

    .sidebar a:hover {
      color: #ffc107;
    }

    .main {
      margin-left: 240px;
      padding: 40px;
    }

    .main h1 {
      margin-bottom: 20px;
    }

    .top-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .btn {
      padding: 10px 20px;
      background: #28a745;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 20px;
      background: white;
      border-radius: 8px;
      overflow: hidden;
      box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    }

    th, td {
      padding: 15px;
      text-align: left;
      border-bottom: 1px solid #f0f0f0;
    }

    th {
      background: #343a40;
      color: white;
    }

    tr:hover {
      background-color: #f8f9fa;
    }

    .actions button {
      padding: 6px 10px;
      margin-right: 5px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
    }

    .edit-btn { background-color: #007bff; color: white; }
    .delete-btn { background-color: #dc3545; color: white; }

    /* Modal */
    .modal {
      display: none;
      position: fixed;
      z-index: 10;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0,0,0,0.5);
      justify-content: center;
      align-items: center;
    }

    .modal-content {
      background: white;
      padding: 30px;
      border-radius: 8px;
      width: 400px;
      max-width: 90%;
    }

    .modal-content h3 {
      margin-top: 0;
    }

    .modal-content input {
      width: 100%;
      padding: 10px;
      margin-bottom: 15px;
      border: 1px solid #ccc;
      border-radius: 5px;
    }

    .modal-content .btn {
      width: 100%;
    }

    .close {
      float: right;
      cursor: pointer;
      font-weight: bold;
      color: #999;
    }

    .close:hover {
      color: #000;
    }