* {
    padding: 0;
    margin: 0;
    border: 0;
    overflow: hidden;
}

.container {
    width: 100%;
    height: 100%;
}

.left-collapsable{
    height: 100%;
    width: 50px;
    background-color: aqua;
    position: absolute;
    left: 0px;
}

.center {
    height: 100%;
    background-color: teal;
    position: absolute;
    overflow-y: scroll;
    overflow-x: hidden;
}


.right-chat {
    height: 100%;
    width: 340px;
    background-color: darkgray;
    position: absolute;
    right: 0px;
}

.left-exp {
    position: fixed;
    left: 55px;
}

.right-exp{
    position: fixed;
    right: 345px;
}

.left-top {
    position: absolute;
    width: 100%;
    height: auto;
    background-color: antiquewhite;
    overflow-y: scroll;
    overflow-x: hidden;
}

.left-bottom {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 55px;
    background-color:cadetblue;
}

.chat-box {
    position: aboslute;
    width: 100%;
    height: auto;
    overflow-x: hidden;
    overflow-y: scroll;
}

.chat-bottom {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 55px;
    background-color:cadetblue;
}