#outernViewer {
    width: 80%;
    height: 500px;
    display: inline-block;
}

#demoButtons {
    width: 19%;
    display: inline-block;
}

#demoButtons button {
    width: calc(100% - 10px);
    background-color: #ff9900;
    color: #FFFFFF;
    border: none;
    margin: 5px;
    padding: 5px;
    cursor: pointer;
    -webkit-box-shadow: 9px 5px 14px 1px rgba(0, 0, 0, 0.23);
    box-shadow: 9px 5px 14px 1px rgba(0, 0, 0, 0.23);
}

#demoButtons button:hover {
    background-color: #31b035;
    transition: 0.5s;
}

#demoButtons div {
    text-align: center;
    border: 1px solid black;
}