.button {
	-fx-padding: 0;
	-fx-margin: 0;
	-fx-background-color: #101010;
	-fx-text-fill: white;
	-fx-font-size: 400%;
	-fx-opacity: 80%;
	-fx-border-width: 1px;
	-fx-border-color: #cecece;
	-fx-border-style: solid;
}

.button: hover{
	-fx-background-color: #000000;
	-fx-opacity: 90%;
	-fx-cursor: hand;
}
.button {
	-fx-padding: 0;
	-fx-margin: 0;
	-fx-background-color: #101010;
	-fx-text-fill: white;
	-fx-font-size: 300%;
	-fx-opacity: 85%;
	-fx-border-width: 2px;
	-fx-border-color: #cecece;
	-fx-border-style: solid;
}

.button: hover{
	-fx-background-color: #000000;
	-fx-opacity: 90%;
	-fx-cursor: hand;
}
Change small things in css file for mainmenu
Change small things in css file for mainmenu
