@layer components {
  .flash {
    display: flex;
    inset-block-start: 1rem;
    inset-inline-start: 50%;
    justify-content: center;
    position: fixed;
    transform: translate(-50%);
    z-index: 30;
  }

  .flash__inner {
    animation: appear-then-fade 3s 300ms both;
    background-color: green;
    border-radius: 4em;
    color: #fff;
    display: inline-flex;
    font-size: 0.8rem;
    margin: 0 auto;
    padding: 0.3rem 1rem;
  }
}