body {
      margin: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #c3cfe2, #f5f7fa);
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }

    .login-card {
      background-color: white;
      padding: 2rem;
      border-radius: 1rem;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
      width: 100%;
      max-width: 400px;
    }

    .login-card h2 {
      margin-bottom: 1.5rem;
      color: #333;
      text-align: center;
    }

    .form-group {
      margin-bottom: 1rem;
    }

    label {
      display: block;
      margin-bottom: 0.5rem;
      color: #666;
    }

    input[type="datetime-local"],
    input[type="date"],
    input[type="number"],
    input[type="text"],
    input[type="password"] {
      width: 90%;
      padding: 0.75rem;
      border: 1px solid #ddd;
      border-radius: 0.5rem;
      font-size: 1rem;
    }

    input[type="submit"] {
      width: 100%;
      padding: 0.75rem;
      background-color: #4a90e2;
      color: white;
      border: none;
      border-radius: 0.5rem;
      font-size: 1rem;
      cursor: pointer;
      transition: background 0.3s ease;
    }

    input[type="submit"]:hover {
      background-color: #357ab7;
    }

    .footer {
      text-align: center;
      margin-top: 1rem;
      font-size: 0.9rem;
      color: #999;
    }

    h1 {
            text-align: center;
            font-weight: 600;
            margin-bottom: 30px;
            font-size: 28px;
        }

        .table-wrapper {
            max-width: 900px;
            margin: auto;
            overflow-x: auto;
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            padding: 24px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 16px;
        }

        th, td {
            padding: 14px 20px;
            text-align: left;
        }

        th {
            background-color: #f0f3f7;
            color: #4a5568;
            font-weight: 600;
            border-bottom: 2px solid #e2e8f0;
        }

        tr:nth-child(even) {
            background-color: #f9fafb;
        }

        tr:hover {
            background-color: #eef2f7;
        }

        td {
            border-bottom: 1px solid #e2e8f0;
        }

        .empty-message {
            text-align: center;
            padding: 20px;
            font-style: italic;
            color: #999;
        }

        .container {
            max-width: 800px;
            margin: auto;
            background: #ffffff;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            padding: 30px;
        }

        .client-info {
            margin-bottom: 40px;
        }

        .client-info p {
            font-size: 18px;
            margin: 8px 0;
        }

         a.back-link {
            display: inline-block;
            margin-top: 20px;
            color: #3498db;
            text-decoration: none;
        }

        a.back-link:hover {
            text-decoration: underline;
        }

        .toggle-btn {
        background-color: #4CAF50; /* Green */
        color: white;
        padding: 10px 20px;
        border: none;
        cursor: pointer;
        font-size: 16px;
        border-radius: 5px;        
        }
        
        .toggle-btn:hover {
            background-color: #45a049;
        }

        .error-message {
          color:red
        }

        .navbar {
          display: flex;
          justify-content: flex-end;
          
          padding: 10px 20px;
          gap: 20px;
          border-bottom: 1px solid #ccc;

      }

      .navbar a {
          color: #333;
          text-decoration: none;
          font-size: 20px;
      }

      .navbar a:hover {
          color: #007BFF;
      }