.waveform {
    position: absolute;
    z-index: 1;
    color: #FFF;
    font-size: 0.85rem;
    margin: 0.25rem;
}

.oscillator-power-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 10;
    /*background-color: red; /* Temporary - to see if button is there */
}

.power-button {
    width: 1.5625rem;
    height: 1.5625rem;
    border: 2px solid transparent;
    /*border: 2px solid yellow; /* Temporary - to see button outline */
    /*background: blue; /* Temporary - to see button */
    cursor: pointer;
    padding: 2px;
    border-radius: 50%;
    transition: all 0.2s ease;
    margin-right: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.power-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}


.power-on-img, .power-off-img {
    width: 1.25rem;  /* Image size modifiction */
    height: 1.25rem; /* Image size modifiction */
    position: absolute;
    transition: opacity 0.2s ease;
    border-radius: 55%; /* Make the images themselves circular */
    object-fit: cover;  
}

/* Shows filled icon when active */
.power-button.active .power-on-img {
    opacity: 1;
}

.power-button.active .power-off-img {
    opacity: 0;
}

/* Shows outline icon when inactive */
.power-button:not(.active) .power-on-img {
    opacity: 0;
}

.power-button:not(.active) .power-off-img {
    opacity: 1;
}