body {
    margin: 0px;
    font-family: 'Tahoma';
    font-size: 16px;
    padding: 10px;
}

.date {
    padding: 3px;
    background-color: #B3F9D1;
    border: solid #0BDF02;
    border-radius: 5px;
    margin-left: 50%;
    margin-top: 20px;
    position: fixed;
    transform: translateX(-90px);
    z-index: 10;
}

.message.in{
    padding: 3px;
    background-color: #F9FDCE;
    border: solid #FCF594;
    margin: 10px;
    border-radius: 10px;
    margin-left: 20px;
    margin-right: 100px;
}
.message.out{
    padding: 3px;
    background-color: #BAF9F2;
    border: solid #6BEBFB;
    margin: 10px;
    border-radius: 10px;
    margin-left: 100px;
    margin-right: 20px;
}

span {
    font-size: 14px;
    color: #666;
}

.message {
    font-size: 26px;
    position: relative;
}

.in::before, .in::after {
    content: '';
    position: absolute;
    left: -20px; top: 10px;
    border: 10px solid transparent;
    border-right: 10px solid #FCF594;
}
.in::after {
    border-right: 10px solid #F9FDCE;
    left: -19px;
}

.message.out::before, .message.out::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 10px;
    border: 10px solid transparent;
    border-left: 10px solid #6BEBFB;
}