:root {
    --svg_sound_off: url(https://apex.adbc.dev/apex/css/svgicons/sound_off.svg);
    --svg_sound_on: url(https://apex.adbc.dev/apex/css/svgicons/sound_on.svg);
}

.svg:before {
    content: "";
    background-repeat: no-repeat;
    background-position: center;
    height: var(--a-button-line-height, 1rem);
    width: var(--a-button-icon-size, 1rem);
}

.svg-sound-off:before {
    background-image: var(--svg_sound_off);
}

.svg-sound-on:before {
    background-image: var(--svg_sound_on);
}