app.css

.messages 
{   
    margin-bottom: 100px;
    margin-top: 50px;
    margin-left: 200px;
}

.message 
{
    border-style: solid;
    border-width: 1px 0px 1px 0px;
    border-color: lightgray;
    background-color: azure;
    padding: 10px;
}

.sayBox 
{
    width: 100%;
    background-color: lightyellow;
    position: fixed;
    bottom: 0; 
    height: 30px;
    padding: 10px;
    margin-left: 201px;
}

.sayInput {
    width: 75%;
}

.header 
{
    width: 100%;
    position: fixed;
    top: 0;
    height: 50px;
    background-color: honeydew;
}

.rooms {
    position: fixed;
    top: 50px;
    width: 200px;
    background-color: blanchedalmond;
    border-right: 1px;
    border-top: 1px;
    border-width: 1px;
    border-style: solid;
    height: 100%;   
}

input.name {
    width: 150px;
    margin-left: 10px;
}