.alert {
  position: fixed;
  left: 50%;
  top: 16px;
  transform: translateX(-50%);
  z-index: 10000 !important;
  min-width: 320px;
  max-width: min(92vw, 960px);
  padding: 12px 16px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  background: #f0f4ff;
  border: 1px solid #cfe0ff;
  color: #0b2a6b;
  font-size: 14px;
  line-height: 1.35;
}

.alert[data-state="visible"] {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.alert__content { display: flex; gap: 6px; align-items: baseline; }
.alert__title { font-weight: 700; }
.alert__message { display: inline; }

/* Varianti */
.alert--success { background: #effaf3; border-color: #c8eed7; color: #0b5b2e; }
.alert--warning { background: #fff8e6; border-color: #ffe1a6; color: #7a4b00; }
.alert--error   { background: #feefef; border-color: #ffc9c9; color: #7a1010; }
.alert--info    { background: #f0f4ff; border-color: #cfe0ff; color: #0b2a6b; }

.alert__close {
  margin-left: auto;
  border: none;
  background: transparent;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  color: inherit;
}