.chat {
    border: 2px solid #dedede;
    background-color: #f1f1f1;
    border-radius: 5px;
    padding: 10px;
    margin: 10px 0;
}
.darker {
    border-color: #ccc;
    background-color: #ddd;
}
.container-chat::after {
    content: "";
    clear: both;
    display: table;
}
.time-right {
    float: right;
    color: #aaa;
}
.time-left {
    float: left;
    color: #999;
}