#salary_treemap, #title_layer {
    width: 100%;
    height: 100%;
    position: absolute;
}
#salary_treemap {
    z-index: 1;
}
#title_layer {
    z-index: 0;
}
rect:hover {
    fill-opacity: 1.0;
}
.tooltip {
    display: none;
    background-color: white;
    border: 1px solid black;
    padding: 10px;
    position: absolute;
    z-index: 2;
    margin: 20px;
}
.chart-container {
    height: 450px;
    width: 100%;
    position: relative;
    overflow: hidden;
    line-height: 0.5;
    background-color: white;
    margin-bottom: 24px;
}
.control:hover {
    cursor: pointer;
}
#year {
    color: grey;
}
@media only screen and (max-width: 600px) {
    .chart-container {
        height: 1000px;
        width: 200%;
    }
    .control {
        margin-right: 10px;
        margin-left: 10px;
        height: 25px;
        color: blue;
        font-size: 25pt;
    }
}