.flash-container {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: auto;
  pointer-events: none;
}

.flash-message {
  background: #222;
  color: #fff;
  padding: 12px 24px;
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
  margin-top: 10px;
  font-size: 15px;
  pointer-events: auto;
  animation: fadeInOut 3.5s ease-in-out forwards;
}

/* consistent alert colors */
.flash-message.alert-success { background-color: #28a745; }
.flash-message.alert-danger  { background-color: #dc3545; }
.flash-message.alert-warning { background-color: #ffc107; color: #000; }

@keyframes fadeInOut {
  0%   { opacity: 0; transform: translateY(20px); }
  10%  { opacity: 1; transform: translateY(0); }
  90%  { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(20px); }
}