Css ? not Button

I’m using CSS on a button but when I do “mvn package -Pproduction” it doesn’t load correctly

Vaadin 15.0.2
.css

.btnSubAtalhos {
	width: 70px;
	height: 70px;
	border-radius: 50%;
	cursor: pointer;
}

.spnCaption {
	margin: 0px;
	font-size: 12px;
	color: #5b5b5b;
	font-family: "Open Sans", sans-serif;
}

18178353.jpg