#oscillator {
    background-color: rgb(138, 138, 138);
    border-radius: 0.5rem;
    border-top-left-radius: 0rem;
    padding: 0.5rem;
    padding-bottom: 0rem;
    padding-right: 0.5rem;
    width: max-content;
    position: relative;
}

#envelope {
    background-color: rgb(138, 138, 138);
    border-radius: 0.5rem;
    border-top-left-radius: 0rem;
    padding: 0.5rem;
    padding-bottom: 0.875rem;
    width: max-content;
}

#filter {
    background-color: rgb(138, 138, 138);
    border-radius: 0.5rem;
    border-top-left-radius: 0rem;
    padding: 0rem 0.5rem;
    margin-left: 0.5rem;
    padding-top: 0.5rem;
    padding-right: 0.5rem;
    padding-bottom: 0.25rem;
    width: max-content;
}

#LFO {
    background-color: rgb(138, 138, 138);
    border-radius: 0.5rem;
    padding: 0.5rem;
    border-top-left-radius: 0rem;
    padding-bottom: 0rem;
    margin-left: 0.5rem;
    width: max-content;
}

.invisible {
    display: none;
}

canvas {
    border-radius: 0.3rem;
}

option {
    color: black;
}
.osc-header {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    height: 2.5rem;
    background-color: #404040;
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
    width: 12rem;
    padding: 0.5rem 0.25rem;
}

.osc-header-active {
    background-color: rgb(138, 138, 138);
}

.lfo-header {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    height: 2.5rem;
    background-color: hsl(0, 0%, 25%);
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
    width: max-content;
    padding: 0.5rem 0.25rem;
}

.lfo-header-active {
    background-color: rgb(138, 138, 138);
}

.env-header {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    height: 2.5rem;
    background-color: hsl(0, 0%, 25%);
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
    width: max-content;
    padding: 0.5rem 0.25rem;
}

.env-header-active {
    background-color: rgb(138, 138, 138);
}

.filter-header {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    height: 2.5rem;
    background-color: hsl(0, 0%, 25%);
    border-top-left-radius: 0.75rem;
    border-top-right-radius: 0.75rem;
    width: max-content;
    padding: 0.5rem 0.25rem;
}

.filter-header-active {
    background-color: rgb(138, 138, 138);
}