button {
    width: 100px;
    height: 25px;
}

#main {
    display: grid;
    grid-template-columns: repeat(12, [col-start] 1fr);
    gap: 20px;
}

.div-item {
    /*margin: 10px;
    height: 30px;*/
    grid-column: span 3;
}

.midi-object {
    padding: 10px;
    margin: 10px;
    border: 1px solid black;
    border-radius: 5px;
    display: flex;
    flex-wrap: wrap;
}

.midi-object-section {
    margin: 5px;
    display: flex;
}

.select-box {
    /* empty */
}