#toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  min-width: 280px;
  max-width: 90vw;
  padding: 14px 18px;
  border-radius: 10px;
  background: #111;
  color: #fff;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity .3s ease, transform .3s ease;
}

/* visible state */
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* optional variants */
.toast.success { background: #0f9d58; }
.toast.error   { background: #d93025; }
.toast.info    { background: #1a73e8; }
.toast.warning { background: #f9ab00; color:#000; }