#istt-button {
	border: none;
	cursor: pointer;
	z-index: 99999;
	opacity: 0;
	visibility: hidden;
	transform: translateY(10px);
	transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
	-webkit-tap-highlight-color: transparent;
}

#istt-button[hidden] {
	display: none;
}

#istt-button.istt-visible {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

#istt-button:hover {
	filter: brightness(1.08);
}

#istt-button:active {
	transform: scale(0.94);
}

#istt-button:focus-visible {
	outline: 2px solid currentColor;
	outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
	#istt-button {
		transition: opacity 0.2s ease, visibility 0.2s ease;
		transform: none;
	}
}