@media (max-width:1120px){
  .chat-launcher{z-index:100021}
  .chat-panel{z-index:100020}
}
@media (max-width:620px){
  .chat-panel{left:12px;right:12px;bottom:86px;width:auto;max-height:calc(100dvh - 104px);overflow-y:auto;overscroll-behavior:contain}
  .chat-head{position:sticky;top:0;z-index:3}
  .chat-head button{position:relative;z-index:4;display:grid;place-items:center;min-width:44px;min-height:44px;cursor:pointer}
  .chat-topics{position:relative;z-index:1}
}