.reading-page { background: #f4f1e9; color: #26342f; }
.reading-header, .reading-footer { max-width: 1160px; margin: auto; padding: 24px; }
.reading-header { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; justify-content: space-between; border-bottom: 1px solid #d7dbd1; }
.reading-brand { display: flex; gap: 10px; align-items: center; text-decoration: none; font-weight: 700; font-size: 18px; }
.reading-header nav, .reading-footer nav { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
.reading-header nav a, .reading-footer nav a { font-size: 14px; padding: 8px 0; text-underline-offset: 6px; }
.reading-header a[aria-current] { font-weight: 700; color: #1e614c; }
.handbook { max-width: 1020px; margin: auto; padding: 52px 40px 64px; }
.handbook h1 { font-size: clamp(29px, 4vw, 44px); line-height: 1.45; margin: 8px 0 18px; }
.eyebrow { font-size: 13px; letter-spacing: .12em; font-weight: 700; color: #416654; }
.byline, .muted, figcaption { color: #536258; font-size: 14px; }
.article-heading { border-bottom: 1px solid #cad2c5; margin-bottom: 28px; padding-bottom: 16px; }
.handbook h2 { font-size: clamp(23px, 3vw, 30px); line-height: 1.5; margin: 0 0 20px; }
.handbook h3 { font-size: 20px; margin: 30px 0 12px; }
.handbook p, .handbook li { max-width: 48em; }
.handbook p { margin: 0 0 18px; }
.handbook section { margin-top: 52px; scroll-margin-top: 20px; }
.handbook a { color: #205d47; text-underline-offset: 4px; }
.handbook li { padding-left: 4px; margin: 10px 0; }
.handbook ul, .handbook ol { padding-left: 24px; }
.contents { background: #e8ece2; border-left: 4px solid #627f66; padding: 20px 26px; margin: 28px 0; }
.contents ul { display: flex; gap: 8px 28px; flex-wrap: wrap; margin: 8px 0 0; padding: 0; list-style: none; }
.contents li { margin: 0; padding: 0; }
.handbook figure { margin: 26px 0; }
.handbook figure img { display: block; width: 100%; height: auto; border: 1px solid #a9b4a3; border-radius: 6px; }
.handbook figcaption { padding: 10px 0; line-height: 1.7; }
.calculation { background: #fffdf6; border: 1px solid #cbd2bf; border-radius: 6px; padding: 22px 26px; margin: 22px 0; }
.calculation .total { font-size: clamp(21px, 3vw, 29px); font-weight: 700; font-variant-numeric: tabular-nums; margin: 0; }
.table-scroll { max-width: 100%; overflow-x: auto; border: 1px solid #b8c3af; background: #fffdf8; }
.handbook table { border-collapse: collapse; width: 100%; font-size: 15px; }
.handbook caption { text-align: left; padding: 16px; font-weight: 700; }
.handbook th, .handbook td { padding: 15px 16px; border-top: 1px solid #d7ddcd; text-align: left; vertical-align: top; min-width: 110px; }
.handbook thead { background: #e4eadb; }
.handbook tbody th { min-width: 170px; font-weight: 500; }
.handbook td { white-space: nowrap; }
.handbook tbody th { position: sticky; left: 0; background: #fffdf8; }
.handbook thead th:first-child { position: sticky; left: 0; background: #e4eadb; }
.formula { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.next-step { padding: 28px; border-top: 2px solid #577760; background: #e5eadf; }
.handbook .play-link { display: inline-block; background: #284f3e; color: white; border-radius: 5px; padding: 11px 24px; text-decoration: none; font-weight: 700; min-height: 48px; }
.reading-footer { border-top: 1px solid #cad2c5; font-size: 14px; }
.reading-footer button { color: inherit; }
.skip-link { position: absolute; left: 16px; top: -70px; background: #fff; padding: 8px 18px; z-index: 10; }
.skip-link:focus { top: 8px; }
:focus-visible { outline: 3px solid #467f61; outline-offset: 4px; }
@media (max-width: 650px) {
 .reading-header, .reading-footer { padding: 20px; }
 .reading-header { gap: 10px; }
 .reading-header nav { gap: 4px 18px; }
 .handbook { padding: 30px 20px 44px; }
 .handbook section { margin-top: 38px; }
 .contents { padding: 16px 20px; }
 .contents ul { display: block; }
 .contents li { margin: 6px 0; }
 .calculation, .next-step { padding: 20px; }
}