$google-color: #dd4b39;
$facebook-color: #4669b4;
$twitter-color: #15beff;

@mixin button-social($bgcolor) {
	color: #ffffff;
	background-color: $bgcolor;
	border-color: darken($bgcolor, 10%);

	&:hover {
		background-color: darken($bgcolor, 10%);
		color: #ffffff;
	}
}

.btn-google {
	@include button-social($google-color);
}

.btn-twitter {
	@include button-social($twitter-color);
}

.btn-facebook {
	@include button-social($facebook-color);
}