.site-message {
  position: fixed;
  top: 10px;
  right: 10px;
  bottom: auto;
  z-index: 10000;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  width: min(400px, calc(100vw - 20px));
  max-width: calc(100vw - 20px);
  min-height: 50px;
  padding: 14px 16px;
  color: #1c1b1f;
  background: #fff;
  border: 1px solid #e5e5eb;
  border-left: 4px solid #d9272e;
  border-radius: 6px;
  box-shadow: 0 8px 30px rgba(28, 27, 31, .15);
  font: 14px/1.5 Arial, sans-serif;
  opacity: 1;
  transition: opacity .6s ease;
}

.site-message.is-hiding { opacity: 0; pointer-events: none; }
.site-message button {
  flex: 0 0 auto;
  margin: -3px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: #49454f;
  cursor: pointer;
  font: 24px/1 Arial, sans-serif;
}
.site-message button:hover { color: #d9272e; }
.site-message button:focus-visible { outline: 2px solid #d9272e; outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { .site-message { transition: none; } }