/* ===== Responsive ===== */
@media(max-width:768px){
  .conv-item .conv-del{opacity:0.6}
  .sidebar{position:fixed;height:100%;left:0;top:0;transform:translateX(-100%);width:min(82vw,320px)}
  .sidebar.show{transform:translateX(0)}
  .topbar-menu{display:flex;align-items:center;justify-content:center}
  .msg.user .msg-body{max-width:90%}
  .chat-inner{padding:0 10px}
  .modal-content{max-width:100%}
  .bg-orb-1{width:300px;height:300px}
  .bg-orb-2{width:250px;height:250px}
  .bg-orb-3{width:200px;height:200px}
  .welcome{padding:40px 16px}
  .welcome-icon svg{width:64px;height:64px}
}
@media(min-width:769px){.sidebar-overlay{display:none!important}}
@media(hover:none){
  .conv-item,.sidebar-footer button,.topbar-btn,.mode-btn,.confirm-card-actions button,.mem-cat-btn{min-height:48px}
  .attach-btn{min-height:48px;min-width:48px;padding:12px}
  .file-remove{opacity:1;min-width:28px;min-height:28px}
  .new-chat-btn{min-width:48px;min-height:48px}
}