style.css

.flexDiv
{
    display: flex;
}

.scrollDiv
{
    overflow-x: scroll;
    position: relative;
}

.sheetArea
{
    height: 200px;
    border: solid black 1px;
}

.scoreCanvas
{
    position: absolute;
    left: 0;
    top: 0;
}

.overlay
{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    visibility: hidden;
}

.popup
{
    position: absolute;
    top: 5%;
    left: 5%;
    max-width: 90%;
    background: white;
    border: solid black 1px;
    visibility: hidden;
    padding: 5px;
}

.buttonList
{
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.noteTypeList
{
    display: inline-block;
    height: 200px;
    top: 0px;
    vertical-align: top;
}

button
{
    background-color: rgb(255, 255, 255);
    color: rgb(0, 0, 0);
    border: 1px solid rgb(0, 0, 0);
    border-radius: 2px;
    margin: 1px;
}

button.down
{
    background-color: rgb(0, 0, 0);
    color: rgb(255, 255, 255);
    border-color: rgb(0, 0, 0);
}