h1 { font-weight: bold; font-size: 28px }
h2 { font-weight: bold; font-size: 24px }
h3 { font-weight: bold; font-size: 19px }
h4 { font-weight: bold; font-size: 15px }
h5 { font-weight: normal; font-size: 12px }
h6 { font-weight: normal; font-size: 9px }