.play-button {
      padding: 12px 24px;
      font-size: 18px;
      cursor: pointer;
      color: white;
      border: none;
      border-radius: 5px;
    }

    .popup {
      display: none;
      position: fixed;
      z-index: 999;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.8);
    }

    .popup-content {
      position: relative;
      background: #fff;
      width: 80%;
      max-width: 800px;
      margin: 100px auto;
      padding: 0;
      border-radius: 10px;
      overflow: hidden;
    }

    .popup iframe {
      width: 100%;
      height: 450px;
      border: none;
    }

    .close-btn {
      position: absolute;
      top: 10px;
      right: 15px;
      font-size: 24px;
      font-weight: bold;
      color: #fff;
      background-color: #000;
      border-radius: 50%;
      width: 30px;
      height: 30px;
      line-height: 30px;
      text-align: center;
      cursor: pointer;
    }

    .close-btn:hover {
      background-color: #ff0000;
    }