#simple-bot-btn{
  position: fixed;
  left: 15px;
  bottom: 15px;
  width: 44px;
  height: 44px;
  background:#0b74ff;
  color:#fff;
  border-radius: 8px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  z-index: 2147483647;
  box-shadow: 0 6px 18px rgba(0,0,0,.18);
  user-select:none;
}

#simple-bot-panel{
  position: fixed;
  left: 15px;
  bottom: 70px;
  width: 320px;
  height: 420px;
  background:#fff;
  border: 1px solid #e6e6e6;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
  z-index: 2147483647;
  display: none;            /* CLOSED BY DEFAULT */
  flex-direction: column;
  overflow: hidden;
  font-family: Arial, sans-serif;
}

#simple-bot-panel .sb-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 10px 12px;
  border-bottom: 1px solid #eee;
}

#simple-bot-panel .sb-title{ font-weight: 700; }
#simple-bot-panel .sb-close{
  border:none;
  background:transparent;
  font-size: 20px;
  cursor:pointer;
}

#simple-bot-panel .sb-messages{
  flex: 1;
  padding: 10px 12px;
  overflow:auto;
  background: #fafafa;
}

#simple-bot-panel .sb-msg{
  padding: 8px 10px;
  margin: 8px 0;
  border-radius: 8px;
  white-space: pre-wrap;
  font-size: 13px;
  line-height: 1.35;
}
#simple-bot-panel .sb-msg.user{
  background: #e8f1ff;
  align-self: flex-end;
}
#simple-bot-panel .sb-msg.bot{
  background: #ffffff;
  border: 1px solid #eee;
  align-self: flex-start;
}

#simple-bot-panel .sb-input{
  display:flex;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid #eee;
}
#simple-bot-panel input{
  flex:1;
  padding: 9px 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
}
#simple-bot-panel button#sb-send{
  padding: 9px 12px;
  border: none;
  background: #0b74ff;
  color:#fff;
  border-radius: 8px;
  cursor:pointer;
}