#desc .rectangle {
  display: none;
}
#desc .rectangle.hidden {
  display: none;
}
@media (max-width: 600px) {
  #content_detail {
    overflow: hidden;
    height: 25em;
  }
  #content_detail.show {
    overflow: auto;
    height: 100%;
  }

  #desc .rectangle {
    width: 100%;
    display: inline-block;
    background-color: #de2599;
    border-color: #de2599;
    color: #ffffff;
    border-radius: 10px;
    margin-top: 15px;
  }
}