/* popup.css */
  .popup {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.75);
    z-index: 9999;
  }

  .popup-content {
    background-color: #1e1e1e; /* màu tối phù hợp nền */
    padding: 16px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.7);
    text-align: center;
    max-width: 300px;
    width: 90%;
    color: #f0f0f0;
    font-size: 14px;
  }

  .popup-content img {
    max-width: 100%;
    border-radius: 6px;
    margin-bottom: 12px;
  }

  .popup-content h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #ffffff;
  }

  .popup-content p {
    font-size: 14px;
    margin-bottom: 14px;
    color: #ccc;
  }

  .popup-content button {
    padding: 6px 14px;
    background-color: #444;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
  }

  .popup-content button:hover {
    background-color: #666;
  }

  .popup-content .close-btn {
    background-color: #e74c3c;
    margin-top: 8px;
  }