#area-toast {
  position: fixed;
  z-index: 3;
  top: calc(max(12px, env(safe-area-inset-top)) + 84px);
  left: 50%;
  width: min(64vw, 600px);
  transform: translateX(-50%);
  pointer-events: none;
  text-align: center;
  color: #f7fbff;
  font: 400 clamp(18px, 2.5vw, 25px)/1.35 "Avenir Next", "Segoe UI", sans-serif;
  letter-spacing: 0.035em;
  text-shadow: 0 1px 4px rgba(0, 25, 45, 0.65);
  opacity: 0;
}
#area-toast small {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  letter-spacing: 0.04em;
}
#area-toast [hidden] { display: none; }