Core/src/styles/components/_headings.less

h1, h2, h3, h4, h5, h6
{
	margin: 0.8em auto;

	&.center, &.main
	{ text-align: center; }
}

h1
{
	font-size: 2.5em;
	font-weight: 800;
}

h2
{
	font-size: 2em;
	font-weight: 800;
}

h3
{
	font-size: 1.7em;
	font-weight: 700;
}

h4
{
	font-size: 1.5em;
	font-weight: 600;
}

h5
{
	font-size: 1.3em;
	font-weight: 600;
}

h6
{
	font-size: 1.15em;
	font-weight: 600;
}