#message-box {
    height: 200px;
    overflow: scroll;
}

#floating-message-btn {
    position: fixed;
    bottom: 20px;
    right: 60px;
    width: 60px;
    height: 60px;
    background-color: #007b88;
    color: white;
    border-radius: 30px;
    text-align: center;
    line-height: 60px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 0 8px 3px rgb(0 0 0 / 25%)
}