style.css

#content {
    position: relative;
}

#content img {
    position: absolute;
    top: 0px;
    right: 0px;
    height: 100px;
    width: auto;
}

#container {
    margin: 0 auto;
    width: 60%;
    background: #fff;
    height: 100%;
    /* overflow: scroll; */
    border-left: 2px solid;
}
    

form {
    margin: 0 auto;
    width: 90%;
    position: absolute;
    top: 90%;
}

form #textbox {
    width: 50%;
    margin-left: 2%;
    font-size: 1em;
    line-height: 10px;
    border: 0;
    outline: 0;
    background: transparent;
    border-bottom: 1.5px solid rgb(104, 104, 104);
    height: 3em;
}

form .send {
    width: 10%;
    height: 3em;
    background: #5181b4;
    font-family: 'PT Sans', sans-serif;
    color: #fff;
    font-size: 1em;
    border: 0;
    border-radius: 5px;
    margin-left: 20px;
    box-shadow: 1px;
    position: relative;
    box-shadow: 2px 2px #7eaee9;
}

form .send:active {
    transition: top 2s -webkit-transform 2s;
    /* Safari */
    top: 2px;
}

form .send:hover {
    background: #5878a1;
    transition: background 2s -webkit-transform 2s;
    /* Safari */
}

body {
    color: #fff;
    font-family: 'PT Sans', sans-serif;

}

#chat {
    height: 80%;
    width: 100%;
    overflow-y: auto;
}   

.chatblock-user,
.chatblock-bot {
    width: 100%;
    height: auto;
    overflow: hidden;
    border-bottom: 1.5px solid #d5dee7;
    padding: 10px 0;
}

.chatblock-user img, .chatblock-bot img {
    width: 6%;
    border-radius: 100%;
    float: left;
}

.chatblock-bot img {
    float: right;
}

.user {
    max-width: 60%;
    background: rgb(131, 182, 199);
    padding: 15px;
    margin-top: .8em;
    margin-bottom: .8em;
    margin-left: 1%;
    float: left;
    display: block;
    border-radius: 20px;
}

.bot {
    max-width: 90%;
    width: auto;
    display: block;
    background: rgb(219, 146, 134);
    margin-right: 2%;
    float: right;
    padding: .8em;
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: right;
    border-radius: 20px;
}