/* Small floating mute button. Appears only after the audio has started. */
#sv-mute {
	position: fixed;
	right: 14px;
	bottom: calc(14px + env(safe-area-inset-bottom, 0px));
	z-index: 999990;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	margin: 0;
	padding: 0;
	border: 1px solid rgba(255, 255, 255, .5);
	border-radius: 50%;
	background: rgba(40, 8, 18, .75);
	color: #fff;
	font-size: 18px;
	line-height: 1;
	cursor: pointer;
	opacity: .8;
	box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
	transition: opacity .2s ease;
}
#sv-mute:hover { opacity: 1; }
#sv-mute:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }