#shop-msg {
  display: none; margin: 1rem 0;
  padding: 0.8rem 1rem; border-radius: 12px; font-size: 0.85rem;
}
#shop-msg.err { background: rgba(230, 57, 70, 0.14); border: 1px solid rgba(230, 57, 70, 0.4); color: #ff9aa5; }
#shop-msg.ok  { background: rgba(212, 175, 55, 0.14); border: 1px solid rgba(212, 175, 55, 0.4); color: var(--accent-gold); }