/* Book furniture: frontispiece, part headings, sequential navigation, colophon. */
@media (prefers-color-scheme: light) {
    :root {
        --clrs-paper: #f8f5ed;
        --clrs-surface: #fffcf5;
        --clrs-sidebar: #f1efe6;
        --clrs-sidebar-2: #f8f5ed;
        --clrs-sidebar-current: #285644;
        --clrs-line: #dcded0;
    }
}
.clrs-book-eyebrow,
.clrs-cover-edition,
.clrs-book-folio {
    font: 600 .73rem/1.65 var(--verso-structure-font-family);
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--clrs-ink-soft);
}
main[data-clrs-book="cover"] .page-toc { display: none; }
main[data-clrs-book="cover"] .code-content > .mod-doc { max-width: 1080px; }
main[data-clrs-book="cover"] .code-content > .mod-doc > section > p { max-width: 74ch; }
.clrs-book-cover {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
    padding: 22px 0 48px;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--clrs-line-strong);
}
.clrs-cover-copy { min-width: 0; }
.code-content .mod-doc .clrs-book-cover h1 {
    margin: 32px 0 24px;
    font: 500 clamp(3.2rem, 5.3vw, 5.6rem)/1.02 var(--verso-text-font-family);
    letter-spacing: -.055em;
}
.code-content .mod-doc .clrs-cover-deck {
    font: 400 clamp(1.3rem, 2vw, 1.85rem)/1.4 var(--verso-text-font-family);
    margin: 0 0 22px;
}
.clrs-cover-description { color: var(--clrs-ink-soft); max-width: 36ch; }
.clrs-book-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px 24px;
    margin: 28px 0;
    font: 600 .9rem/1.5 var(--verso-structure-font-family);
}
.clrs-book-actions .clrs-book-primary {
    padding: 12px 18px;
    border-radius: 3px;
    color: var(--clrs-paper);
    background: var(--clrs-green);
    text-decoration: none;
}
.clrs-book-primary span { margin-left: 14px; }
.clrs-cover-art { grid-row: 1; margin: 0; min-width: 0; }
.clrs-cover-art img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 6px;
}
.module-tree .nav-title a::before {
    content: "";
    flex: 0 0 42px;
    border: 0;
    background: url("assets/clrs-lean-icon.png") center / contain no-repeat;
}
.breadcrumbs li:first-child > :is(a, .current) {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.breadcrumbs li:first-child > :is(a, .current)::before {
    content: "";
    width: 26px;
    height: 26px;
    flex: 0 0 26px;
    border-radius: 4px;
    background: url("assets/clrs-lean-icon.png") center / contain no-repeat;
}
.clrs-cover-art figcaption {
    margin-top: 12px;
    color: var(--clrs-ink-soft);
    font: italic .85rem/1.5 var(--verso-text-font-family);
}
.clrs-cover-edition { margin: 28px 0 0; }
.clrs-cover-edition span { margin: 0 12px; color: var(--clrs-accent); }
main[data-clrs-book="contents"] .mod-doc > section { margin-bottom: 36px; }
main[data-clrs-book="contents"] .clrs-cover-art { margin-bottom: 32px; }
main[data-clrs-book="contents"] .mod-doc > section:has(h2) {
    padding-top: 16px;
    border-top: 1px solid var(--clrs-line);
}
main[data-clrs-book="contents"] .mod-doc > section > ul {
    list-style: none;
    padding-left: 0;
}
main[data-clrs-book="contents"] .mod-doc > section > ul > li { padding: 5px 0; }
.clrs-chapter-header h1 { font-family: var(--verso-text-font-family); font-weight: 500; }
.clrs-implementation {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--clrs-line-strong);
}
.clrs-implementation-source { margin: 28px 0 40px; min-width: 0; }
.clrs-implementation-source > :is(h3, h4) {
    font: 600 1rem/1.5 var(--verso-structure-font-family);
    overflow-wrap: anywhere;
}
.clrs-implementation-provenance { text-decoration-thickness: 1px; }
.clrs-book-pagination {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    max-width: var(--verso-prose-max-width);
    padding: 28px 0;
    margin-top: 56px;
    border-top: 1px solid var(--clrs-line-strong);
    border-bottom: 1px solid var(--clrs-line);
}
.clrs-book-pagination a { display: flex; flex-direction: column; gap: 10px; text-decoration: none; }
.clrs-book-pagination a:last-child { text-align: right; }
.clrs-book-pagination span {
    color: var(--clrs-ink-soft);
    font: 500 .8rem/1.4 var(--verso-structure-font-family);
}
.clrs-book-pagination strong { font: 500 1.15rem/1.5 var(--verso-text-font-family); }
.clrs-book-pagination a:hover strong { text-decoration: underline; }
.clrs-book-folio { margin-top: 20px; }
.clrs-book-colophon {
    max-width: 720px;
    padding: 52px 0 20px;
    margin: 52px 0 0;
    border-top: 1px solid var(--clrs-line-strong);
    text-align: center;
    line-height: 1.75;
}
.clrs-book-colophon img { display: block; width: 100%; height: auto; margin-bottom: 26px; }
.clrs-book-colophon h2 { font: 500 clamp(1.8rem, 3vw, 2.5rem)/1.25 var(--verso-text-font-family); }
.clrs-book-colophon .clrs-book-actions { justify-content: center; }
.clrs-book-credits { color: var(--clrs-ink-soft); font-size: .86rem; }
@media (max-width: 1100px) and (min-width: 769px) {
    .clrs-book-cover { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .clrs-book-cover { grid-template-columns: 1fr; gap: 32px; padding-top: 0; }
    .code-content .mod-doc .clrs-book-cover h1 { margin: 20px 0; font-size: clamp(3rem, 13vw, 4.3rem); }
    .clrs-book-pagination { gap: 18px; }
    .clrs-book-pagination strong { font-size: 1rem; overflow-wrap: anywhere; }
    .clrs-book-colophon { margin-top: 36px; padding-top: 32px; }
}