#preface-group .preface {
    border-right: 0;
    max-width: 100%;
}

#page img, #page table, #page p, #colorbox img, #colorbox table, #colorbox p {
    margin: 0 auto;
}

#preface-group h2.title, #preface-group h2.block-title,
#postscript-group h2.title, #postscript-group h2.block-title {
    text-align: center;
}