.flash-containter {
  --max-width: 20rem;
  top: 0.5em;
  max-width: var(--max-width);
  inset-inline-start: calc((100vw - var(--max-width) / 2) - 50%);
  width: 100%; 
  display: inline-flex; 
  justify-content: center;
}

.flash-notice {
  display: inline-block;
  animation: scale-fade-in-then-wait 6s both;
  font-size: 0.9em;
  background: black;
  padding: 0.5em 1em;
  border-radius: 999px;
  color: var(--color-white);
  text-align: center;
  margin: 0 0.5em;
}