popup_container доработка

#popup_container .b {
  background: black ;
  opacity: 0.5;
}
 
#popup_container .tl {
  background: black ;
  opacity: 0.5;
  border-top-left-radius: 20px;
}
 
#popup_container .tr {
  background: black ;
  opacity: 0.5;
  border-top-right-radius: 20px;
}
 
#popup_container .bl {
  background: black ;
  opacity: 0.5;
  border-bottom-left-radius: 20px;
}
 
#popup_container .br {
  background: black ;
  opacity: 0.5;
  border-bottom-right-radius: 20px;
}