.flash{
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  min-width: 280px;
  max-width: min(520px, 90vw);
  margin: 0;
  padding:12px 14px;
  border-radius:10px;
  display:flex;
  gap:10px;
  align-items:flex-start;
}
.flash::before{ content:"ℹ️"; }
.flash.error::before{ content:"✖"; }
.flash.warn::before{ content:"⚠️"; }
.flash.success::before{ content:"✔"; }