.backdrop-popup {
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 1;
  transition: opacity 0.325s cubic-bezier(0.44, 0, 0.1, 1);
  display: none;
  align-items: center;
  justify-content: center;
}

.content-popup {
  max-width : 620px;
  padding: 20px;
}

@media (max-width: 600px) { .content-popup {
  max-width : 400px;
  padding: 20px;
} }