/* Learning reader: scoped so hubs, vocabulary cards and music keep their layouts. */
.reader-entry { background: #f5f7f6; padding-bottom: 1px; }
.reader-entry .reader-width { width: min(940px, calc(100% - 40px)); margin-inline: auto; }
.reader-entry .reader-header { padding: 32px 0 26px; background: #fff; border-bottom: 1px solid #e3e9e5; }
.reader-breadcrumbs { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-bottom: 28px; font-size: 12px; line-height: 1.6; }
.reader-breadcrumbs a { color: #667582; text-decoration: none; font-weight: 500; }
.reader-breadcrumbs a + a::before { content: '/'; margin-right: 10px; color: #adb8bf; }
.reader-eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 12px; font-weight: 700; }
.reader-eyebrow > span { color: #087b75; text-transform: uppercase; letter-spacing: 1.2px; }
.reader-eyebrow a { padding-left: 12px; border-left: 1px solid #cedbd6; color: #63716d; text-decoration: none; font-weight: 500; }
.reader-entry .reader-title { margin: 0; max-width: 920px; font: 750 clamp(28px, 3.1vw, 38px)/1.2 'Segoe UI', Arial, sans-serif; letter-spacing: -1.05px; color: #172b2a; text-wrap: balance; }
.reader-lead { max-width: 740px; color: #586760; font-size: 17px; line-height: 1.7; margin: 18px 0 0; }
.reader-audio-source { display: flex; align-items: center; gap: 14px; margin-top: 24px; padding: 16px 18px; border: 1px solid #d7e9e2; border-radius: 12px; background: #f2f8f5; }
.reader-audio-icon { display: grid; place-items: center; width: 42px; height: 42px; flex: 0 0 auto; border-radius: 50%; background: #dcefe6; color: #087b75; }
.reader-audio-icon svg { width: 23px; height: 23px; }
.reader-audio-source > div { display: grid; gap: 2px; }
.reader-audio-source strong { color: #173e34; font-size: 15px; font-weight: 700; }
.reader-audio-source > div > span { font-size: 12px; color: #687a72; }
.reader-audio-source > a { margin-left: auto; padding: 11px 16px; border-radius: 8px; background: #087b75; color: #fff; font-size: 14px; font-weight: 650; text-decoration: none; white-space: nowrap; }
.reader-audio-source > a:hover { background: #06665f; }
.reader-toc { display: flex; align-items: baseline; gap: 12px 24px; margin-top: 24px; padding-top: 20px; border-top: 1px solid #e6ebe8; }
.reader-toc > span { flex: 0 0 auto; color: #64736b; font-size: 12px; }
.reader-toc ol { display: flex; flex-wrap: wrap; gap: 10px 22px; padding: 0; margin: 0; list-style: none; }
.reader-toc a { color: #24534a; font-size: 14px; line-height: 1.5; font-weight: 600; text-decoration: none; }
.reader-toc a:hover { text-decoration: underline; }
.reader-entry .reader-body { padding: 30px 0 56px; }
.reader-paper { padding: 38px 56px; border: 1px solid #e0e7e2; border-radius: 16px; background: #fff; box-shadow: 0 4px 20px #15382b04; }
.reader-entry .reader-content { min-width: 0; padding: 0; background: transparent; border: 0; box-shadow: none; color: #30413c; font: 400 18px/1.8 'Segoe UI', Arial, sans-serif; overflow-wrap: break-word; }
.reader-entry .reader-content h2 { margin: 36px 0 18px; color: #173a31; font: 700 26px/1.3 'Segoe UI', Arial, sans-serif; letter-spacing: -.5px; text-align: left; }
.reader-entry .reader-content h3 { margin: 28px 0 12px; color: #4a6157; font: 650 17px/1.4 'Segoe UI', Arial, sans-serif; text-align: left; }
.reader-content [id], .reader-toc, .reader-continue { scroll-margin-top: 96px; }
.reader-content .reader-legacy-anchor { display: block; height: 0; }
.reader-content strong { font-weight: 650; }
.reader-content p { margin: 0 0 16px; }
.reader-content ul, .reader-content ol { padding-left: 24px; }
.reader-content li { margin-bottom: 8px; }
.reader-context, .reader-references, .reader-guidance { padding: 14px 18px; border: 1px solid #e2e9e4; border-radius: 10px; background: #f8faf8; margin: 18px 0 28px; font-size: 15px; }
.reader-context summary, .reader-references summary, .reader-guidance summary { cursor: pointer; color: #3a5b50; font-weight: 600; }
.reader-entry summary:focus-visible, .reader-entry .reader-table:focus-visible { outline: 2px solid #087b75; outline-offset: 4px; }
.reader-context[open] summary, .reader-references[open] summary, .reader-guidance[open] summary { margin-bottom: 14px; }
.reader-guidance:first-child { margin-top: 0; }
.reader-entry .he-quick-answer { padding: 24px; border-color: #dde8e0; border-left-color: #087b75; }
.reader-entry .he-quick-answer h2 { margin-top: 0; font-size: 22px; }
.reader-entry .he-quick-answer p:last-child { margin-bottom: 0; }
.reader-entry .reader-guidance .he-quick-answer { border: 0; padding: 0; margin: 0; background: transparent; }
.reader-context p:last-child { margin-bottom: 0; }
.reader-entry .reader-dialogue { margin: 0 0 32px; border: 1px solid #e0e9e3; border-radius: 12px; overflow: hidden; }
.reader-dialogue > div { display: grid; grid-template-columns: 108px minmax(0, 1fr); gap: 12px; padding: 15px 20px; }
.reader-dialogue > div:nth-child(odd) { background: #f3f8f5; }
.reader-dialogue > div + div { border-top: 1px solid #e6eee8; }
.reader-dialogue dt { align-self: center; color: #487166; font-size: 13px; font-weight: 650; }
.reader-dialogue dd { margin: 0; color: #223f37; font-size: 18px; }
.reader-vocabulary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 0 0 24px; }
.reader-vocabulary > div { padding: 14px 18px; border: 1px solid #e1e9e4; border-radius: 10px; background: #fbfcfa; }
.reader-vocabulary dt { font-size: 17px; font-weight: 650; color: #164d3f; }
.reader-vocabulary dd { margin: 3px 0 0; color: #65766d; font-size: 15px; }
.reader-entry .reader-table { max-width: 100%; overflow: auto; margin: 20px 0 28px; border: 1px solid #dde6df; border-radius: 10px; }
.reader-entry .reader-table table { margin: 0; font-size: 16px; }
.reader-entry .reader-table th { background: #edf5f0; color: #2e5547; }
.reader-entry .reader-content iframe, .reader-entry .reader-content audio { max-width: 100%; }
.reader-entry .he-quiz { margin-top: 36px; padding: 26px; background: #eff7f2; border: 1px solid #dce9e0; border-radius: 12px; box-shadow: none; }
.reader-entry .he-quiz h2 { margin-top: 8px; font-size: 24px; }
.reader-entry .he-quiz__head p { color: #61736a; font-size: 15px; }
.reader-entry .he-faq { margin-top: 32px; padding-top: 24px; border-top: 1px solid #e2e9e4; }
.reader-entry .he-faq h2 { margin-top: 0; font-size: 22px; }
.reader-entry .he-faq .section-heading p { display: none; }
.reader-entry .he-faq summary { font-size: 16px; line-height: 1.55; }
.reader-entry .he-related-manual { font-size: 15px; }
.reader-entry .he-related-manual h2 { font-size: 18px; margin: 12px 0; }
.reader-continue { margin-top: 32px; }
.reader-continue > h2, .reader-related > h2 { margin: 0 0 18px; font-size: 20px; font-weight: 650; color: #294c40; }
.reader-entry .he-series-nav { margin: 0; padding: 0; border: 0; }
.reader-entry .he-series-nav__row { gap: 14px; }
.reader-entry .he-series-nav__link { background: #fff; padding: 20px; border: 1px solid #dae5dd; border-radius: 12px; text-decoration: none; }
.reader-entry .he-series-nav__link--empty { display: none; }
.reader-entry .he-series-nav__link strong { font-size: 17px; line-height: 1.5; }
.reader-entry .he-series-nav__index { font-size: 14px; margin: 0 0 14px; }
.reader-related { margin-top: 32px; }
.reader-related > div { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.reader-related a { display: flex; gap: 14px; justify-content: space-between; padding: 18px; border: 1px solid #dfe7e1; border-radius: 10px; background: #fff; color: #3f5e50; text-decoration: none; font-size: 14px; line-height: 1.6; }
.reader-related a:hover { border-color: #087b75; }
.reader-sr { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media (max-width: 640px) {
    .reader-entry .reader-width { width: calc(100% - 28px); }
    .reader-entry .reader-header { padding: 22px 0; }
    .reader-breadcrumbs { margin-bottom: 20px; font-size: 12px; gap: 4px 7px; }
    .reader-entry .reader-title { font-size: 27px; line-height: 1.25; letter-spacing: -.6px; text-wrap: auto; }
    .reader-audio-source { flex-wrap: wrap; padding: 14px; gap: 12px; }
    .reader-audio-source > div { flex: 1; }
    .reader-audio-source > a { width: 100%; text-align: center; margin-left: 0; }
    .reader-toc { display: block; margin-top: 20px; padding-top: 16px; }
    .reader-toc ol { gap: 10px 18px; margin-top: 10px; }
    .reader-toc a { font-size: 13px; }
    .reader-entry .reader-body { padding-top: 18px; }
    .reader-paper { padding: 24px 18px; border-radius: 12px; }
    .reader-entry .reader-content { font-size: 16px; line-height: 1.8; }
    .reader-entry .reader-content h2 { font-size: 23px; }
    .reader-dialogue > div { grid-template-columns: 1fr; gap: 3px; padding: 12px 14px; }
    .reader-dialogue dd { font-size: 17px; }
    .reader-vocabulary { grid-template-columns: 1fr; }
    .reader-entry .he-quiz { padding: 18px; }
    .reader-entry .he-quiz h2 { font-size: 21px; }
    .reader-related > div { grid-template-columns: 1fr; }
    .reader-entry .he-series-nav__row { grid-template-columns: 1fr; }
}
.reader-header .article-date { color:#61756b; font-size:13px; margin:12px 0; }