/* Arsenic book preview: scoped styles shared by home and book page. */
.arsenic-feature{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:clamp(35px,7vw,110px);align-items:center;background:#242522;color:#f8f1df;padding-top:85px;padding-bottom:85px}.arsenic-feature>div{min-width:0}.arsenic-cover{width:100%;max-width:320px;margin:auto}.arsenic-cover img{display:block;width:100%;height:auto;box-shadow:0 18px 42px #0007}.arsenic-feature h1,.arsenic-feature h2{font-family:var(--serif);font-weight:400;font-size:clamp(2.7rem,5vw,5rem);line-height:1.04;letter-spacing:-.035em;margin:18px 0 24px}.arsenic-feature .eyebrow{color:#e7c78e}.arsenic-feature p{max-width:670px;line-height:1.75}.arsenic-feature .arsenic-subtitle{font-family:var(--serif);font-size:clamp(1.3rem,2vw,1.7rem);line-height:1.4;color:#e7c78e}.arsenic-feature .small{margin-top:22px;color:#ded6c8}.arsenic-link{color:#f8f1df;text-underline-offset:5px}.arsenic-reading{max-width:810px;margin:auto;padding:80px 28px;scroll-margin-top:90px}.arsenic-reading h2,.arsenic-updates h2{font-family:var(--serif);font-size:clamp(2.2rem,4vw,3.6rem);line-height:1.15;font-weight:400;letter-spacing:-.025em;margin:20px 0 30px}.arsenic-reading>p:not(.eyebrow):not(.arsenic-byline),.arsenic-essay p{font-family:var(--serif);font-size:1.2rem;line-height:1.85;margin:0 0 1.3em}.arsenic-byline{font-size:.88rem;color:#526163;margin-bottom:35px}.arsenic-excerpt{background:#f4efe5;scroll-margin-top:80px}.arsenic-updates{text-align:center;padding-top:75px;padding-bottom:85px}.arsenic-updates p{max-width:650px;margin:20px auto;line-height:1.7}.arsenic-updates .text-link{display:inline-block;margin-top:18px}@media(max-width:760px){.arsenic-feature{grid-template-columns:1fr;padding-top:50px;padding-bottom:50px;gap:35px}.arsenic-cover{max-width:250px}.arsenic-feature h1,.arsenic-feature h2{font-size:clamp(2.5rem,10vw,4rem)}.arsenic-reading{padding:55px 24px}.arsenic-feature .button-row{align-items:flex-start}.arsenic-feature .button{white-space:normal;text-align:center}}

/* Historical reading source added to the book page. */
#historical-background h3{font-family:var(--serif);font-size:clamp(1.4rem,3vw,1.85rem);line-height:1.35;margin:32px 0 14px}#historical-background .arsenic-source-note{font-family:var(--sans, sans-serif);font-size:.9rem;line-height:1.6;margin-top:22px}#historical-background .button-row{flex-wrap:wrap;gap:20px}