#mail-toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #111;
  color: #fff;
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 13px;
  letter-spacing: 0.02em;
  opacity: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
  z-index: 9999;
  white-space: nowrap;
}

#mail-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}