changed margin-top to margin-bottom, add margin-bottom to h1 tag, added h2 tag for other main heads on the page, added h3 for main heads with less margin-bottom, subhead was renamed to h4
changed margin-top to margin-bottom, add margin-bottom to h1 tag, added h2 tag for other main heads on the page, added h3 for main heads with less margin-bottom, subhead was renamed to h4