.wst-heading {
text-align: center;
}
.wst-heading._chapter-head{
font-size: 150%;
font-weight: bold;
margin-top: 2em;
margin-bottom: 2em;
}
.wst-heading._section-num{
font-size: 144%;
margin-top: 1em;
margin-bottom: 1em;
}
.wst-heading._section-title{
font-size: 120%;
font-style: italic;
margin-top: 1em;
margin-bottom: 1em;
}
.wst-heading._section-subtitle{
font-variant: all-small-caps;
margin-top: 0.5em;
margin-bottom: 0.5em;
}
.wst-heading._subsection-title{
font-style: italic;
margin-top: 1em;
margin-bottom: 0.5em;
}