#sampleSource {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 50px 2fr 1fr;
    height: 100%;
}
#sampleSource .pathIndicatorCell {
    grid-column: 1;
    grid-column-end: 3;
    grid-row: 1;
    background-color: rgb(57, 66, 62);
}
#sampleSource .waveFormCell {
    grid-column: 1;
    grid-column-end: 3;
    grid-row: 2;
    background-color: rgb(24, 77, 162);
}
#sampleSource .cell {
    background-color: rgb(70, 208, 146);
}