#book-nav { list-style: none; text-align: center; z-index: 1100; position: relative; }
#book-nav li { display: inline; }
#book-nav li a { color: white; padding: 3px 8px; }
#book-nav li.current_page_item a, #book-nav li a:hover { text-decoration: underline; color: #abdaff; }

h1 { font-family: MuseoLight, Georgia, serif; text-align: center; }

.add-to-cart-buttons {  }
.add-to-cart-buttons div { width: 44%; padding: 15px; text-align: center; line-height: 1.9; background: #ffefb0; -moz-box-shadow: 0 0 2px #666; -webkit-box-shadow: 0 0 2px #666; }
.add-to-cart-buttons span { font-family: MuseoLight, Georgia, serif;  font-size: 24px; }
.print-version { float: left; }
.pdf-version { float: right; }

h4 { clear: both; font-family: MuseoLight, Georgia, serif; font-size: 22px; font-weight: normal; margin: 4px 0 15px 0; }

.learn ul { list-style: none; }
.learn ul li { background: rgba(255,255,255,0.2); padding: 10px; margin: 0 0 10px 0; font-size: 18px; }