.book-content .h1 { font-size: x-large; font-weight: bold; text-transform: uppercase; text-align: center; margin-top: 18pt; }
.book-content .h2 { font-size: large; font-weight: bold; text-transform: uppercase; text-align: center; margin-top: 12pt; }
.book-content .h3 { font-size: medium; font-weight: bold; text-transform: uppercase; text-align: center; margin-top: 9pt; }
.book-content .h4 { font-weight: bold; text-transform: uppercase; text-align: center; margin-top: 6pt; }