/* Forward Deployed chapter pages: the book's prose on the site's .prose measure, plus the book's
   own furniture (callout boxes, diagrams, tables, checklists, citations). */
.v2 .book-chapter-page { padding-bottom: var(--ds-section-gap); }
.v2 .book-chapter-bar { max-width: 720px; margin: 0 auto; padding: 8px 20px 0; display: flex; justify-content: space-between; gap: 20px; font-size: var(--ds-label); color: #61655f; }
.v2 .book-chapter-bar a { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; }
.v2 .book-chapter-bar a:hover { color: var(--v2-fg); }
.v2 .book-chapter { padding: 0 20px; }
.v2 .book-chapter-head { max-width: 720px; margin: clamp(32px, 6vw, 72px) auto 44px; }
.v2 .book-chapter-head h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); line-height: 1.08; margin-top: 18px; text-wrap: balance; }
.v2 .book-chapter-author { margin-top: 20px; font-size: var(--ds-label); color: var(--v2-muted); }

.v2 .book-chapter-prose { overflow-wrap: break-word; }
.v2 .book-chapter-prose em { font-style: italic; }
.v2 .book-chapter-prose hr { border: 0; border-top: 1px solid var(--v2-line); margin: 2.4em 0; }
.v2 .book-chapter-prose h4 { font-size: 1.1rem; margin: 1.8em 0 0.6em; }
.v2 .book-chapter-prose ul, .v2 .book-chapter-prose ol { padding-left: 1.3em; }

/* Callouts: the book sets diagrams, checklists and key points in shaded boxes. */
.v2 .book-chapter-prose blockquote { margin: 2em 0; padding: 22px 24px; border: 0; border-radius: var(--v2-radius-sm); background: #ebebe6; color: var(--v2-fg); }
.v2 .book-chapter-prose blockquote > :last-child { margin-bottom: 0; }
.v2 .book-chapter-prose blockquote :is(h2, h3, h4) { margin: 0 0 0.8em; padding-top: 0; border-top: 0; font-size: 1.15rem; line-height: 1.35; }
.v2 .book-chapter-prose blockquote p { color: var(--v2-fg); }

/* ASCII diagrams keep their alignment and scroll inside their own box on narrow screens. */
.v2 .book-chapter-prose pre { margin: 1.2em 0; padding: 18px 20px; background: #fbfbf8; color: #26302b; border: 1px solid #dcdfd6; border-radius: var(--v2-radius-sm); overflow-x: auto; font-size: 0.78rem; line-height: 1.35; }
.v2 .book-chapter-prose pre code { background: none; padding: 0; font-size: inherit; white-space: pre; }

.v2 .book-chapter-prose table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: 0.92rem; line-height: 1.5; display: block; overflow-x: auto; }
.v2 .book-chapter-prose :is(th, td) { padding: 10px 12px; border-bottom: 1px solid #d5d8d0; text-align: left; vertical-align: top; min-width: 120px; }
.v2 .book-chapter-prose th { font-weight: 500; }

.v2 .book-chapter-prose ul:has(> li > label > input[type="checkbox"]) { list-style: none; padding-left: 0; }
.v2 .book-chapter-prose li > label:has(> input[type="checkbox"]) { display: block; position: relative; padding-left: 26px; }
.v2 .book-chapter-prose li > label > input[type="checkbox"] { appearance: none; position: absolute; left: 0; top: 0.32em; width: 15px; height: 15px; margin: 0; border: 1.5px solid #8a9187; border-radius: 3px; background: #fff; }
.v2 .book-chapter-prose li > label > input[type="checkbox"]:checked { border-color: #3155c8; background: #3155c8 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2 5 8.6l4.5-5' fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 11px no-repeat; }

.v2 .book-chapter-prose a.book-cite { text-decoration: none; color: #3155c8; font-size: 0.85em; white-space: nowrap; }
.v2 .book-chapter-prose a.book-cite:hover { text-decoration: underline; }
.v2 .book-chapter-prose p[id^="ref-"] { scroll-margin-top: 96px; }
.v2 .book-chapter-prose p[id^="ref-"]:target { background: #e6ebf5; border-radius: 6px; }

.v2 .book-chapter-nav { max-width: 720px; margin: 64px auto 0; padding: 0 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.v2 .book-chapter-step { display: grid; gap: 8px; padding: 22px 0; border-top: 1px solid #d5d8d0; }
.v2 .book-chapter-step strong { font-weight: 400; font-size: var(--ds-copy); line-height: 1.4; }
.v2 .book-chapter-step:hover strong { text-decoration: underline; text-underline-offset: 4px; }
.v2 .book-chapter-step--next { text-align: right; grid-column: 2; }
.v2 .book-chapter-foot { max-width: 720px; margin: 28px auto 0; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }

/* The book page's part list links each part's chapters. */
.v2 .book-chapter-links { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 2px; }
.v2 .book-parts .book-chapter-links li { display: block; border: 0; padding: 0; }
.v2 .book-chapter-links a { display: inline-flex; gap: 10px; align-items: baseline; min-height: 32px; padding-block: 4px; font-size: var(--ds-body); line-height: 1.45; }
.v2 .book-chapter-links a:hover { text-decoration: underline; text-underline-offset: 4px; }
.v2 .book-chapter-links small { color: #747a71; font-size: var(--ds-meta); min-width: 22px; }
.v2 .book-extras { display: flex; gap: 8px 28px; flex-wrap: wrap; margin-top: 28px; padding-top: 22px; border-top: 1px solid #d5d8d0; }

@media (max-width: 540px) {
  .v2 .book-chapter-nav { grid-template-columns: 1fr; gap: 0; }
  .v2 .book-chapter-step--next { grid-column: 1; }
  .v2 .book-chapter-prose blockquote { padding: 18px 16px; margin-inline: -4px; }
  .v2 .book-chapter-foot > .btn { width: 100%; }
}