client-side.css

.__let_me_read_container {
    position: fixed;
    z-index: 10000;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.__let_me_read_item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100px;
    height: 60px;
    margin-bottom: 5px;
}
.__let_me_read_operator {
    position: relative;
    flex-grow: 0;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 20px;
    background:#F44336;
}
.__let_me_read_operator:hover {
    background-color: #B71C1C;
}
.__let_me_read_operator img {
    position: absolute;
    top: 7px;
    left: 7px;
    width: 26px;
    height: 26px;
}
.__let_me_read_operator.__operator_toggle {
    position: relative;
    width: 30px;
    height: 30px;
    background-color: #9E9E9E;
    border-radius: 0;
    margin-left: 5px;
    margin-right: 5px;
}
.__let_me_read_operator.__operator_toggle:hover {
    background-color: #212121;
}
.__let_me_read_operator.__operator_toggle img {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 26px;
    height: 26px;
}
.__let_me_read_title {
    background-color: #9E9E9E;
    font-size: 12px;
    color: white;
    padding: 2px 10px;
    border-radius: 2px;
    visibility: hidden;
}