/* لایه تاریک */
  #custom-popup {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999999;
  }
  #custom-popup.is-open { display: flex; }

  /* قفل اسکرول وقتی پاپ‌آپ بازه */
  html.no-scroll, body.no-scroll { overflow: hidden !important; }

  /* جعبه پاپ‌آپ */
  #custom-popup .popup-content {
    background: #fff;
    border-radius: 12px;
    max-width: 90%;
    width: 420px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }
  #custom-popup img { max-width: 100%; height: auto; border-radius: 8px; }
  #custom-popup .sep {
    margin: 20px 0;
    border: 0;
    border-top: 1px solid #ddd;
  }
  #custom-popup #close-popup {
    background: #0073e6;
    color: #fff;
    border: 0;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: background .3s;
  }
  #custom-popup #close-popup:hover { background: #005bb5; }