.textbook-page[data-astro-cid-mtf6bztx]{max-width:var(--max-width);margin:0 auto;padding:0 12px}.textbook-detail-hero[data-astro-cid-mtf6bztx]{display:grid;grid-template-columns:minmax(220px,340px) minmax(0,1fr);gap:4rem;align-items:center;margin:4rem 0 5rem}.textbook-cover-column[data-astro-cid-mtf6bztx] img[data-astro-cid-mtf6bztx]{display:block;width:100%;max-width:280px;border-radius:16px;box-shadow:0 18px 46px #1f242821}.textbook-detail-copy[data-astro-cid-mtf6bztx]{max-width:720px}.textbook-detail-copy[data-astro-cid-mtf6bztx] h1[data-astro-cid-mtf6bztx]{margin:0 0 .75rem;font-size:clamp(2rem,3.2vw,3rem);line-height:1.02;letter-spacing:-.055em;color:var(--accent)}.subtitle[data-astro-cid-mtf6bztx]{margin:0 0 1.25rem;color:var(--muted);font-size:1.1rem}.textbook-detail-copy[data-astro-cid-mtf6bztx] p[data-astro-cid-mtf6bztx]:not(.subtitle){font-size:1.15rem;line-height:1.55;color:var(--ink)}.purchase-links[data-astro-cid-mtf6bztx]{display:flex;flex-wrap:wrap;gap:.7rem;margin:2rem 0 1.25rem}.pill-link[data-astro-cid-mtf6bztx]{display:inline-flex;align-items:center;justify-content:center;padding:.8rem 1rem;border-radius:999px;background:var(--accent);color:#fff;font-weight:700;text-decoration:none}.pill-link[data-astro-cid-mtf6bztx]:hover{background:var(--accent-dark)}.resource-links[data-astro-cid-mtf6bztx]{display:flex;flex-wrap:wrap;gap:1rem}.resource-links[data-astro-cid-mtf6bztx] a[data-astro-cid-mtf6bztx]{color:var(--accent);font-weight:700;text-decoration:none}.resource-links[data-astro-cid-mtf6bztx] a[data-astro-cid-mtf6bztx]:hover{color:var(--accent-dark)}.textbook-section[data-astro-cid-mtf6bztx]{margin:5rem 0}.textbook-section[data-astro-cid-mtf6bztx] h2[data-astro-cid-mtf6bztx]{margin:0 0 1rem;font-size:clamp(1.9rem,3.5vw,2.8rem);color:var(--accent)}.textbook-section[data-astro-cid-mtf6bztx] p[data-astro-cid-mtf6bztx]{max-width:none;font-size:1.05rem;line-height:1.55;color:var(--ink)}.exercise-list[data-astro-cid-mtf6bztx]{display:grid;gap:.75rem;max-width:560px;margin:1.5rem auto 0}.exercise-item[data-astro-cid-mtf6bztx]{display:grid;grid-template-columns:minmax(130px,.45fr) minmax(0,1fr);gap:1rem;align-items:center;padding:.85rem 1rem;border:1px solid var(--line);border-radius:18px;background:var(--surface);color:inherit;text-decoration:none}.exercise-item[data-astro-cid-mtf6bztx]:hover{border-color:var(--accent)}.exercise-item[data-astro-cid-mtf6bztx] span[data-astro-cid-mtf6bztx]{color:var(--muted)}.exercise-item[data-astro-cid-mtf6bztx] strong[data-astro-cid-mtf6bztx]{color:var(--ink)}@media(max-width:800px){.textbook-page[data-astro-cid-mtf6bztx]{padding:0 20px}.textbook-detail-hero[data-astro-cid-mtf6bztx]{grid-template-columns:1fr;gap:2rem;margin:3rem 0 4rem}.textbook-cover-column[data-astro-cid-mtf6bztx]{display:flex;justify-content:center}.textbook-cover-column[data-astro-cid-mtf6bztx] img[data-astro-cid-mtf6bztx]{max-width:220px}.textbook-detail-copy[data-astro-cid-mtf6bztx]{max-width:none}.textbook-detail-copy[data-astro-cid-mtf6bztx] h1[data-astro-cid-mtf6bztx]{font-size:clamp(1.7rem,8vw,2.4rem)}.subtitle[data-astro-cid-mtf6bztx]{font-size:.95rem;white-space:nowrap}.textbook-detail-copy[data-astro-cid-mtf6bztx] p[data-astro-cid-mtf6bztx]:not(.subtitle){font-size:1rem}.purchase-links[data-astro-cid-mtf6bztx]{justify-content:center;gap:.6rem;margin:1.5rem 0 1.25rem}.pill-link[data-astro-cid-mtf6bztx]{min-width:8rem;padding:.75rem .95rem;font-size:.95rem}.resource-links[data-astro-cid-mtf6bztx]{justify-content:center;gap:.85rem;text-align:center}.textbook-section[data-astro-cid-mtf6bztx]{margin:4rem 0}.textbook-section[data-astro-cid-mtf6bztx] h2[data-astro-cid-mtf6bztx]{font-size:clamp(1.6rem,8vw,2.2rem)}.textbook-section[data-astro-cid-mtf6bztx] p[data-astro-cid-mtf6bztx]{font-size:1rem}.exercise-list[data-astro-cid-mtf6bztx]{max-width:420px;margin:1.5rem auto 0}.exercise-item[data-astro-cid-mtf6bztx]{grid-template-columns:1fr;gap:.25rem;padding:.9rem 1rem;text-align:center}}@media(max-width:480px){.textbook-page[data-astro-cid-mtf6bztx]{padding:0 18px}.textbook-detail-hero[data-astro-cid-mtf6bztx]{margin:2.5rem 0 3.5rem}.textbook-cover-column[data-astro-cid-mtf6bztx] img[data-astro-cid-mtf6bztx]{max-width:190px}.subtitle[data-astro-cid-mtf6bztx]{font-size:.85rem}.purchase-links[data-astro-cid-mtf6bztx]{flex-direction:column;align-items:stretch;max-width:260px;margin-left:auto;margin-right:auto}.pill-link[data-astro-cid-mtf6bztx]{width:100%}.resource-links[data-astro-cid-mtf6bztx]{flex-direction:column;align-items:center;gap:.45rem}.exercise-list[data-astro-cid-mtf6bztx]{max-width:320px}}