#chat-toggle{
  position:fixed;
  bottom:20px;
  right:20px;
  background:#1e90ff;
  color:#fff;
  border:none;
  padding:14px;
  border-radius:50%;
  font-size:18px;
  cursor:pointer;
  z-index:99999;
}

#ngtech-chat{
  position:fixed;
  bottom:80px;
  right:20px;
  width:320px;
  background:#fff;
  border-radius:12px;
  box-shadow:0 10px 30px rgba(0,0,0,.2);
  display:none;
  font-family:Segoe UI, Arial, sans-serif;
  z-index:99999;
}

#chat-header{
  background:#1e90ff;
  color:#fff;
  padding:12px;
  font-weight:bold;
  border-radius:12px 12px 0 0;
}

#chat-body{
  height:260px;
  padding:10px;
  overflow-y:auto;
  font-size:14px;
}

#chat-input{
  display:flex;
  border-top:1px solid #ddd;
}

#chat-input input{
  flex:1;
  border:none;
  padding:10px;
  outline:none;
}

#chat-input button{
  background:#1e90ff;
  color:#fff;
  border:none;
  padding:10px 14px;
  cursor:pointer;
}

.msg-user{ text-align:left; margin:6px; color:#000; white-space:pre-line; }
.msg-bot{ text-align:left; margin:6px; color:#1e90ff; white-space:pre-line; }