#re-act .center {
    width: 800px;
    margin: 0 auto;
}

#re-act .chat {
    height: 350px;
    border: 1px gray solid;
    margin: 10px auto;
    padding: 10px;
    overflow-y: auto;
}

#re-act .panels .ui-button {
    margin-left: 5px;
}

#re-act .question {
    border: 1px gray solid;
    padding: 6px;
    flex-grow: 1;
}

#re-act .hyde {
    cursor: pointer;
    padding: 6px;
}

#re-act .chat.busy {
    opacity: 0.5;
}

#re-act .chat.busy::before {
    content: 'Busy...';
    position: absolute;
    top: 200px;
    z-index: 10;
    font-size: 30px;
}

#re-act .chat .message {
    position: relative;
    padding: 10px;
    min-height: 35px;
}

#re-act .chat .message span {
    display: inline-block;
    vertical-align: top;
    max-width: 60%;
    padding: 20px;
    border-radius: 10px;
    white-space: pre-line;
}

#re-act .chat .message::before {
    content: '';
    width: 0;
    height: 0;
    border-left: 1vh solid transparent;
    border-right: 1vh solid transparent;
    position: absolute;
    bottom: 7px;
}

#re-act .chat .system {
    text-align: left;
}

#re-act .chat .user {
    text-align: right;
}

#re-act .chat .system span {
    background-color: palegreen;
}

#re-act .chat .system.aux span {
    background-color: gainsboro;
}

#re-act .chat .user span {
    background-color: powderblue;
}

#re-act .chat .system::before {
    border-top: 4vh solid palegreen;
    left: 1px;
    transform: rotate(60deg);
}

#re-act .chat .system.aux::before {
    border-top: 4vh solid gainsboro;
}

#re-act .chat .user::before {
    border-top: 4vh solid powderblue;
    right: 1px;
    transform: rotate(-60deg);
}