.card {
      max-width: 600px;
      margin: auto;
      background: #ffffff;
      padding: 30px;
      border-radius: 16px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.07);
    }

    .title {
      font-size: 26px;
      font-weight: 600;
      text-align: center;
      margin-bottom: 25px;
      color: #333;
    }

    .package-selector {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 25px;
      flex-wrap: wrap;
      gap: 10px;
    }

    .package-label {
      font-size: 18px;
      font-weight: 500;
      color: #444;
    }

    .package-controls {
      display: flex;
      align-items: center;
      flex-wrap: nowrap;
    }

    .package-controls button {
      background-color: #007bff;
      color: white;
      font-size: 20px;
      padding: 5px 15px;
      border: none;
      border-radius: 8px;
      margin: 0 10px;
      cursor: pointer;
      transition: background-color 0.3s;
    }

    .package-controls button:disabled {
      background-color: #ccc;
      cursor: not-allowed;
    }

    .package-value {
      font-size: 20px;
      font-weight: 600;
      color: #222;
    }

    .bonus-info {
      text-align: center;
      font-size: 18px;
      margin-bottom: 25px;
      background: #f8f9fa;
      padding: 12px;
      border-radius: 10px;
      color: #444;
    }

    .select-label {
      margin-bottom: 10px;
      font-weight: 500;
      font-size: 16px;
      color: #555;
    }

    select {
      width: 100%;
      padding: 12px;
      font-size: 16px;
      border-radius: 8px;
      border: 1px solid #ccc;
      margin-bottom: 20px;
    }

    .payment-info {
      background: #f6f7f9;
      padding: 20px;
      border-radius: 12px;
      text-align: center;
      margin-bottom: 30px;
    }

    .payment-info img {
      width: 130px;
      height: 130px;
      margin-bottom: 15px;
      border-radius: 10px;
      border: 1px solid #ddd;
    }

    .payment-info p {
      margin: 4px 0;
      font-size: 15px;
      color: #333;
    }

    .features {
      background: #f9fafc;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid #e2e6ea;
    }

    .features-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 15px;
      color: #333;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px 20px;
    }

    .feature-item {
      display: flex;
      align-items: center;
      font-size: 15px;
      color: #444;
    }

    .feature-item::before {
      content: "✅";
      margin-right: 10px;
    }

    /* Responsive Styling */
    @media (max-width: 600px) {
      body {
        padding: 20px 10px;
      }

      .card {
        padding: 20px;
      }

      .title {
        font-size: 22px;
      }

      .package-selector {
        flex-direction: column;
        align-items: flex-start;
      }

      .package-controls {
        margin-top: 10px;
      }

      .package-controls button {
        padding: 5px 10px;
        font-size: 18px;
        margin: 0 5px;
      }

      .package-value {
        font-size: 18px;
      }

      .bonus-info {
        font-size: 16px;
        padding: 10px;
      }

      .payment-info img {
        width: 100px;
        height: 100px;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }
    }