.bui-backdrop {
  --background-color: var(--bui-backdrop-background-color, rgba(0, 0, 0, 0.68));
  position: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  right: 0;
  bottom: 0;
  left: 0;
  top: 0;
  background-color: var(--background-color);
}
.bui-backdrop-invisible {
  background-color: transparent;
}