body {
      font-family: "Segoe UI", Arial, sans-serif;
      background-color: #f4f6f8;
      margin: 0;
      padding: 15px;
    }
    h1 {
      text-align: center;
      color: #065f46;
      font-size: 1.6rem;
      margin-bottom: 20px;
    }
    form {
      background: #fff;
      padding: 15px;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    input, button {
      padding: 10px;
      border-radius: 5px;
      border: 1px solid #ccc;
      font-size: 1rem;
    }
    input[type="number"], input[type="date"], input[type="text"] {
      width: 160px;
    }
    button {
      cursor: pointer;
      transition: 0.3s;
    }
    #exportBtn {
      background: #2563eb;
      color: white;
      border: none;
    }
    #exportBtn:hover {
      background: #1d4ed8;
    }
    button[type="submit"] {
      background: #059669;
      color: white;
      border: none;
    }
    button[type="submit"]:hover {
      background: #047857;
    }

    .table-container {
      overflow-x: auto;
      background: white;
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      min-width: 900px;
    }
    th, td {
      padding: 10px;
      text-align: center;
      border-bottom: 1px solid #ddd;
    }
    th {
      background: #065f46;
      color: white;
    }
    tr:nth-child(even) {
      background: #f9f9f9;
    }
    .delete-btn, .edit-btn {
      border: none;
      padding: 6px 10px;
      border-radius: 5px;
      color: white;
      cursor: pointer;
      font-size: 0.9rem;
    }
    .delete-btn {
      background: red;
    }
    .edit-btn {
      background: orange;
      margin-right: 5px;
    }

    .summary {
      background: #fff;
      padding: 15px;
      border-radius: 10px;
      margin-top: 20px;
      text-align: center;
      font-weight: bold;
      color: #065f46;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      font-size: 1rem;
    }

    /* ✅ Responsive adjustments */
    @media (max-width: 900px) {
      table {
        font-size: 0.9rem;
      }
      input[type="number"], input[type="date"], input[type="text"] {
        width: 140px;
      }
    }

    @media (max-width: 600px) {
      input[type="number"], input[type="date"], input[type="text"] {
        width: 100%;
      }
      form {
        flex-direction: column;
        align-items: stretch;
      }
      h1 {
        font-size: 1.3rem;
      }
      .summary {
        font-size: 0.9rem;
      }
      th, td {
        padding: 8px;
      }
    }

    @media (max-width: 400px) {
      th, td {
        font-size: 0.8rem;
        padding: 6px;
      }
      .delete-btn, .edit-btn {
        padding: 4px 6px;
        font-size: 0.75rem;
      }
      button[type="submit"], #exportBtn {
        padding: 8px;
      }
    }