.catalog-back{display:inline-block;font-size:12px;color:var(--muted);text-decoration:none;margin-bottom:24px}.part-heading{font-family:var(--sans);font-size:12px;letter-spacing:1.6px;text-transform:uppercase;margin:29px 0 15px;color:var(--muted)}.book-home .chapter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-home .chapter-card{min-height:245px}.book-home .chapter-card h3{font-size:14px;font-weight:550}.book-home .chapter-verb{font-size:28px}.sidebar{position:sticky;top:0;max-height:calc(100vh - 80px);overflow:auto;padding-top:21px}.sidebar-chapters{display:grid;gap:2px;margin-top:10px}.sidechapter{padding:9px 10px}.sidechapter .num{font-size:20px}.sidechapter b{font-size:11px;line-height:1.35;display:block}.sidechapter small{font-size:9px}.sidebar-note{padding-top:22px;margin-top:16px}.pdf-button{font-size:12px;text-decoration:none;border:1px solid var(--line);padding:7px 11px;border-radius:7px}.concept-help{display:flex;gap:6px;flex-wrap:wrap;margin:-6px 0 22px}.concept-help .term-chip{background:transparent;color:#687d6b;font-size:10px}.jargon{font:inherit;color:inherit;padding:0;border:0;border-bottom:1px dotted #82977d;border-radius:0;background:transparent;display:inline;line-height:inherit;text-align:inherit}.jargon:hover{color:var(--teal);border-bottom-style:solid}.jargon:focus-visible{outline-offset:2px}.related-label{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin:18px 0 9px}.terms{display:flex;flex-wrap:wrap;gap:6px}.compare-selects{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}.compare-selects label{font-size:11px;color:var(--muted)}.compare-selects select{margin-top:7px;width:100%;padding:11px 8px;border:1px solid var(--line);background:var(--card)}.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.comparison-grid article{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px}.comparison-grid p{font-size:13px;line-height:1.7}.comparison-grid .example{color:var(--muted);font-size:12px}.practice-banner{margin:0 0 16px;padding:10px 14px;background:#e6eee2;border-radius:8px;font-size:12px;color:#4e7257;display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap}.task-actions{gap:9px}.task-actions .secondary{padding:11px 15px}.rule-graph{height:230px}.bench .experiment{overflow:hidden}.lab-title{gap:20px}.brand{text-decoration:none}.sidebar .back{margin-bottom:5px}.sidebar .quiet{text-align:left}.book-home .hero{margin-bottom:38px}.topbar{gap:12px}.top-actions{flex-shrink:0}
@media(max-width:1000px){.book-home .chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.book-home .hero{gap:20px}.book-home h1{font-size:55px}}
@media(max-width:760px){.book-home h1{font-size:43px}.book-home .chapter-card{padding:17px;min-height:245px}.book-home .chapter-verb{font-size:25px}.book-home .chapter-card h3{font-size:12px}.pdf-button{font-size:10px;padding:6px}.comparison-grid{grid-template-columns:1fr}.compare-selects{gap:10px}.topbar .brand-sub{font-size:7px;letter-spacing:.8px}.topbar .brand-name{font-size:9px;letter-spacing:1px}.top-actions button{font-size:11px;padding:7px}.source-line{font-size:10px}.task-actions .primary{width:100%}.task-actions .later{margin-left:auto}.concept-help{gap:5px}.concept-help .term-chip{padding:4px 8px}.rule-graph{height:210px}}