.chapter {
    max-width: 1000px;
    margin: 1.5rem auto;
    padding: 1.25rem;
    border: 1px solid #ddd;
    border-radius: 12px;
}

.chapterHeader {
    display: grid;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.chapterNumber {
    font-weight: 600;
    opacity: 0.8;
}

.chapterTitle {
    margin: 0;
}

.chapterDescription {
    line-height: 1.55;
    margin-bottom: 1rem;
}

.chapterSubheader {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.subheaderTitle {
    margin: 0 0 0.5rem;
}

.subheaderText {
    line-height: 1.55;
}