.flash-notice {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #d1fae5;
  color: #065f46;
  padding: 12px 20px;
  border-radius: 6px;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  z-index: 9999;
}