#my-modal {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    padding: 0 3%;
    box-sizing: border-box;
    pointer-events: all;
}

#my-modal .modal-content {
  width: 640px;
  margin: 0 auto;
  background-color: #fff;
  position: relative;
}

#my-modal .modal-content .modal-close {
  position: absolute;
  right: -32px;
  top: -32px;
  cursor: pointer;
  z-index: 200;
  color: #fff;
}

#my-modal .modal-content .imagebox {
  a {
    display: block;
  }
  img {
    width: 100%;
    vertical-align: bottom;
  }
}

#my-modal .modal-content .moviebox {
  line-height: 0;
}

#my-modal .modal-content .moviebox iframe {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
}
@media screen and (max-width: 728px) {
  #my-modal .modal-content .modal-close {
    position: absolute;
    display: flex;
    top: auto;
    right: auto;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
  }
}