.main-content {
    font-size: 85%;
    line-height: 1.6;
}
@media only screen and (min-width: 720px) {
	h2 {
		font-size: 28px;
	}
	h3 {
		font-size: 20px;
	}
	h4 {
		font-size: 18px;
	}
}