body {
      font-family: Arial, sans-serif;
      background: #f5f5f5;
      margin: 40px;
      padding: 20px;
    }

    .container {
      background: #fff;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    }

    .tabs {
      margin-bottom: 5px;
    }

    .tabs button {
      background: #3d756b;
      color: white;
      border: none;
      padding: 10px 20px;
      margin-right: 1px;
      border-radius: 5px;
      cursor: pointer;
    }

    .tabs button.active {
      background: #275148;
    }

    .header {
      background: #3a7c6d;
      color: white;
      padding: 12px 20px;
      font-size: 35px;
      font-weight: bold;
      border-radius: 6px 6px 0 0;
    }

    .subtitle {
      margin: 10px 0 20px;
      font-size: 14px;
      color: #555;
    }

    .section {
      display: none;
    }

    .section.active {
      display: block;
    }

    .toolbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 10px 0;
    }

    .toolbar button {
      background: #3d756b;
      color: white;
      border: none;
      padding: 8px 15px;
      border-radius: 5px;
      cursor: pointer;
    }

    .toolbar button:hover {
      background: #275148;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 10px;
    }

    table, th, td {
      border: 1px solid #ddd;
    }

    th, td {
      border: 1px solid #dee2e6;
      padding: 10px;
      text-align: left;
    }

    th {
      background: #3d756b;
      font-weight: bold;
      color: #ffffff;
    }
    td button {
      background: none;
      border: none;
      cursor: pointer;
      margin: 0 4px;
      font-size: 16px;
      color: #333;
    }
    td button:hover {
      color: #007bff;
    }
    td button:last-child:hover {
      color: #dc3545; /* red for delete */
    }

    /* Modal */
    .modal {
      display: none;
      position: fixed;
      z-index: 1;
      left: 0; top: 0;
      width: 100%; height: 100%;
      background-color: rgba(0,0,0,0.4);
    }

    .modal-content {
      background: #fff;
      margin: 5% auto;
      padding: 20px;
      border-radius: 6px;
      width: 400px;
      box-shadow: 0 4px 8px rgba(0,0,0,0.2);
      position: relative;
    }

    .modal-content h2 {
      margin: 0 0 10px 0;
      font-size: 18px;
    }

    .close {
      position: absolute;
      top: 10px; right: 15px;
      font-size: 20px;
      cursor: pointer;
    }

    .modal-content input,
    .modal-content select,
    .modal-content button {
      width: 100%;
      padding: 10px;
      margin: 8px 0;
      border-radius: 4px;
      border: 1px solid #ccc;
      box-sizing: border-box;
    }

    .modal-content button {
      background: #3d756b;
      color: white;
      border: none;
      cursor: pointer;
    }

    .modal-content button:hover {
      background: #275148;
    }

    input[type="text"], select, textarea {
    text-transform: uppercase;
    }

    .notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 6px;
    font-weight: bold;
    z-index: 1000;
    color: #fff;
    opacity: 1;
    transition: opacity 0.3s ease;
    /* ❌ remove display:none */
    }

    .notification.success { background: #28a745; }  /* green add */
    .notification.error { background: #dc3545; }    /* red delete */
    .notification.info { background: #007bff; }     /* blue edit */

    .notification.hide {
    opacity: 0;
    }

    /* Confirm Modal */
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      padding-top: 120px;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      overflow: auto;
      background-color: rgba(0,0,0,0.4);
    }

    .modal-content {
      background-color: #fff;
      margin: auto;
      padding: 20px;
      border-radius: 10px;
      width: 400px;
      text-align: center;
      box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    }

    .confirm-buttons {
      margin-top: 20px;
      display: flex;
      justify-content: space-around;
    }

    .btn-yes {
      background: #4CAF50;
      color: white;
      border: none;
      padding: 8px 18px;
      border-radius: 6px;
      cursor: pointer;
      font-weight: bold;
    }

    .btn-no {
      background: #f44336;
      color: white;
      border: none;
      padding: 8px 18px;
      border-radius: 6px;
      cursor: pointer;
      font-weight: bold;
    }