@media (max-width: 480px) {
  .chat-fab { width: 48px; height: 48px; bottom: 16px; right: 16px; }
  .chat-fab svg { width: 22px; height: 22px; }
}

@media (max-width: 375px) {
  .chat-messages { padding: 14px 12px; }
  .chat-input-area { padding: 10px 12px; }
}

/* ═══ Chat thread rail: back button on mobile overlay ═══ */
@media (max-width: 768px) {
  .chat-thread-rail.open .chat-thread-rail-header { padding-top: 10px; }
}

@media (hover: none) {
  .chat-thread-item-actions { display: flex; }
}

@media (pointer: coarse) {
  .chat-thread-new-btn { width: 44px; height: 44px; }
  .chat-thread-item-action { width: 44px; height: 44px; font-size: 14px; }
  .chat-rail-toggle { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; font-size: 20px; }
  .chat-close-btn { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
  .chat-summary-btn, .chat-clear-btn { min-height: 44px; padding: 6px 10px; }
}