.custui-webpage {
  display: flex;
  flex-flow: column;
  position: relative;
  overflow: hidden;
}
.custui-webpage .header {
  position: absolute;
  top: -30px;
  left: 0;
  width: 100%;
  height: 30px;
  background-color: rgba(7, 14, 10, 0.8);
  display: flex;
  justify-content: space-between;
  transition: 0.5s top;
}
.custui-webpage .headerAnimation {
  top: 0;
}
.custui-webpage .page-content {
  flex: 1;
}
.custui-webpage .page-content iframe {
  width: 100%;
  height: 100%;
}