/* Three reading structures; reviewed article blocks remain intact. */
.reading-article{--reading-ink:#203848;--reading-blue:#607e92;--reading-line:#ccd7de;background:#fff;color:var(--reading-ink)}
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.detail-nav{position:static;width:100%;padding:18px 22px;background:#f3f6f8;border:0;border-radius:0;display:grid;grid-template-columns:1fr auto;gap:20px}.reading-article .detail-nav ol{display:flex;flex-wrap:wrap;gap:10px 25px;margin:12px 0 0;padding:0;list-style:none}.reading-article .detail-nav li{margin:0}.reading-article .detail-nav a{font-size:11px}.reading-article .detail-nav summary{font-size:12px}.reading-article .detail-nav>.detail-return{align-self:start;margin:0;padding:0;border:0}.reading-chapter{padding:78px 0;border-bottom:1px solid #dae2e7}.reading-chapter-heading{display:grid;grid-template-columns:200px 1fr;align-items:baseline;margin-bottom:48px}.reading-chapter-heading h2{font:400 34px/1.6 var(--serif,serif);margin:0;letter-spacing:.03em}.reading-chapter-heading .reading-kicker{margin:0}.reading-article .detail-section{margin:0;padding:0 0 42px;border:0;max-width:810px}.reading-article .detail-section h2{font:400 24px/1.65 var(--serif,serif);padding:0;margin:0 0 23px;border:0}.reading-article .detail-section p{font:400 16px/2.15 var(--sans,sans-serif);max-width:46em;overflow-wrap:anywhere}.reading-article .ingredient-facts{margin-top:30px;background:#f4f7f9;padding:20px 24px}.reading-article .ingredient-facts div{padding:13px 0}.reading-article .ingredient-facts dt{font-size:11px}.reading-article .ingredient-facts dd{font-size:13px}.reading-split{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:start}.reading-two-columns{display:grid;grid-template-columns:1fr 1fr;gap:80px}.reading-article .visual-overview-heading{padding:0;border:0;margin:0 0 20px}.reading-article .visual-overview-heading h2{font:400 18px/1.9 var(--serif,serif);margin:8px 0 0}.reading-article .visual-explainer{padding:26px;border-radius:0;background:#f1f5f7;border:1px solid #d5e0e6;box-shadow:none}.reading-article .visual-explainer figcaption{font-size:11px;line-height:1.85}.reading-article .visual-reading-pause{margin:0;display:block;background:none;border:0;padding:0}.reading-article .pause-photo{display:block;width:100%;height:260px;object-fit:cover}.reading-article .visual-reading-pause>div{padding:22px 0}.reading-article .visual-reading-pause p{font:400 19px/1.9 var(--serif,serif)}.reading-article .visual-reading-pause small{font-size:10px;color:#708594}.reading-article .editorial-hero-art{margin:0;min-height:0;height:auto;background:#e5eef2;border-radius:0}.reading-article .editorial-photo{width:100%;height:100%;min-height:0;object-fit:cover}.reading-article .editorial-art-caption{font-size:10px}.reading-photo-note{display:grid;grid-template-columns:1fr 1fr;gap:36px;max-width:810px;margin-top:14px}.reading-photo-note .editorial-hero-art{height:300px}.reading-research{background:#eef3f6}.reading-research .detail-section{max-width:850px;margin-inline:auto}.reading-article .visual-comparison{max-width:950px;margin:22px auto 50px;padding:32px;background:#fff;border:0}.reading-article .visual-table-wrap{overflow-x:auto}.reading-article .visual-table-wrap table{min-width:0}.reading-article .visual-comparison h3{font:400 23px/1.7 var(--serif,serif)}.reading-article .evidence-point-list{gap:24px}.reading-article .detail-section#sources{padding:32px 0;background:none;border-top:1px solid #bacbd5;max-width:none}.reading-article .source-meta{font-size:12px;line-height:1.8}.reading-ending .detail-section{max-width:none}.reading-article .detail-notice{max-width:810px;margin:20px 0}.reading-return{display:inline-block;margin:32px 0 0}.reading-three-questions{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;padding:30px 0 0}.reading-three-questions a{display:grid;grid-template-columns:40px 1fr;gap:0 12px;text-decoration:none;border-top:1px solid #aebfca;padding:20px 0}.reading-three-questions span{grid-row:1/3;color:#7c94a5;font-size:12px}.reading-three-questions strong{font:400 26px/1.5 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.editorial-hero-art{height:230px}.reading-pdrn-overview .reading-document-photo .visual-reading-pause{margin-top:30px}.reading-pdrn-overview .reading-document-photo .pause-photo{height:180px}.reading-tromethamine .reading-cover{padding-top:45px;max-width:1100px}.reading-tromethamine .reading-question{font-size:48px}.reading-tromethamine .diagram-formulation-hub .diagram-stage{padding-top:15px}.reading-tromethamine .diagram-formulation-hub .diagram-nodes{display:grid;grid-template-columns:1fr;gap:13px;padding:0 0 115px 22px;margin-left:10px;border-left:1px solid #a6bccb}.reading-tromethamine .diagram-formulation-hub .diagram-node:not(.role-result){position:relative;text-align:left;border:0;border-bottom:1px solid #c1d1db;background:#e2ebf0;padding:16px 20px}.reading-tromethamine .diagram-formulation-hub .diagram-node:not(.role-result):before{content:'';position:absolute;left:-23px;top:31px;width:22px;border-top:1px solid #a6bccb}.reading-tromethamine .diagram-formulation-hub .diagram-node strong{font-size:16px}.reading-tromethamine .diagram-formulation-hub .diagram-node-detail{font-size:12px}.reading-tromethamine .diagram-formulation-hub .diagram-root{bottom:42px;left:30px;right:0;width:calc(100% - 32px);max-width:none;border-radius:0;padding:13px}.reading-tromethamine .diagram-formulation-hub .role-result{bottom:3px;left:0;right:0}.reading-tromethamine .diagram-formulation-hub .diagram-connectors{display:none}
@media(max-width:900px){.reading-shell{width:calc(100% - 48px)}.reading-split{gap:35px;grid-template-columns:1fr 1fr}.reading-glycerin .reading-cover{gap:36px}.reading-chapter-heading{grid-template-columns:160px 1fr}.reading-glycerin .reading-choice-layout{gap:40px}.reading-pdrn-overview .reading-label .detail-section{margin-left:160px}.reading-two-columns{gap:40px}}
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@media(prefers-reduced-motion:reduce){.reading-article *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Keep the reading premise and first takeaways within a short opening. */
.reading-article .visual-hero-link{margin-top:0;min-height:32px;font-size:11px}.reading-article .detail-heading-copy h1{margin-bottom:16px}.reading-article .visual-story-title{margin-bottom:12px}.reading-article .detail-tags{margin:10px 0 12px}.reading-cover{padding-top:36px}.reading-article .reading-question{margin-top:22px}.reading-article .reading-preview{margin-bottom:0}.reading-article .reading-kicker{margin-bottom:16px}
@media(max-width:650px){.reading-article .breadcrumbs{padding-block:15px 0}.reading-cover,.reading-glycerin .reading-cover{padding-block:22px 20px}.reading-article .reading-kicker{margin-bottom:12px}.reading-article .detail-heading-copy>p:first-child{margin-bottom:8px}.reading-article .detail-heading-copy h1{margin-bottom:12px;line-height:1.3}.reading-article .visual-story-title{font-size:16px;line-height:1.7;margin-bottom:10px}.reading-article .detail-aliases{margin-top:8px;margin-bottom:8px}.reading-article .detail-tags{margin:8px 0}.reading-article .visual-hero-link{min-height:30px;margin:0;font-size:10px}.reading-article .reading-question{margin:18px 0 12px;font-size:25px}.reading-article .reading-preview{font-size:11px;line-height:1.9}.reading-cover-photo{margin-top:20px}.reading-cover-photo .editorial-hero-art{height:125px}.reading-orientation{padding-top:18px}.reading-article .detail-lead{font-size:17px;line-height:1.75;margin-bottom:12px}.reading-article .article-key-points{padding-top:12px}.reading-article .article-key-points h2{margin-bottom:12px}.reading-pdrn-overview .detail-heading-copy h1{font-size:38px}.reading-pdrn-overview .reading-cover{padding-top:22px}}
/* Content-specific opening, with the actual diagram or choices at the entrance. */
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@media(max-width:900px){.reading-article .reading-cover{gap:35px}.reading-article .reading-cover .reading-question{font-size:35px}.reading-glycerin .reading-cover .reading-question{font-size:34px}.reading-pdrn-overview .reading-cover{gap:35px}.reading-pdrn-overview .reading-cover .reading-question{font-size:27px}}
@media(max-width:650px){.reading-article .reading-cover,.reading-glycerin .reading-cover,.reading-pdrn-overview .reading-cover{display:flex;flex-direction:column;gap:24px;padding:24px 0;align-items:stretch}.reading-article .reading-cover h1{font-size:18px;margin-bottom:10px}.reading-article .reading-cover .reading-question{font-size:29px;line-height:1.6;margin:0 0 14px}.reading-article .reading-cover .visual-story-title{font-size:16px;line-height:1.8;margin-bottom:12px}.reading-cover-metadata{padding-top:10px}.reading-article .reading-cover-metadata .kicker{font-size:9px}.reading-article .reading-cover-metadata .detail-aliases{font-size:9px}.reading-article .reading-cover-metadata .visual-hero-link{min-height:28px}.reading-cover-diagram{padding:0}.reading-tromethamine .reading-cover-copy{display:contents}.reading-tromethamine .reading-cover-copy>.reading-kicker,.reading-tromethamine .reading-cover-copy>h1,.reading-tromethamine .reading-cover-copy>.reading-question{order:0;margin-bottom:0}.reading-tromethamine .reading-cover-diagram{order:1}.reading-tromethamine .reading-cover-copy>.visual-story-title,.reading-tromethamine .reading-cover-copy>.reading-preview,.reading-tromethamine .reading-cover-copy>.reading-cover-metadata{order:2}.reading-tromethamine .reading-cover{gap:13px}.reading-cover-photo{margin:0}.reading-glycerin .reading-cover-photo .editorial-hero-art{height:90px}.reading-glycerin .reading-cover .reading-question{font-size:28px}.reading-glycerin .reading-cover{gap:18px}.reading-glycerin-prompts .reading-three-questions{gap:16px;padding:0 0 18px}.reading-glycerin-prompts .reading-three-questions strong{font-size:20px}.reading-pdrn-overview .reading-cover h1{font-size:74px;margin-bottom:17px}.reading-title-note{font-size:10px;margin-top:6px}.reading-pdrn-overview .reading-cover .reading-question{font-size:27px}.reading-pdrn-overview .reading-label .detail-section{margin-left:0}.reading-label-route{gap:15px;font-size:11px}.reading-pdrn-orientation .detail-lead{font-size:16px}}
.reading-tromethamine .reading-cover-diagram .diagram-stage.count-4 .diagram-nodes{grid-template-columns:1fr;padding-bottom:115px}.reading-tromethamine .reading-cover-diagram .diagram-stage.count-4 .diagram-node:not(.role-result){display:grid;grid-template-columns:26px 1fr;gap:0 12px}.reading-tromethamine .reading-cover-diagram .diagram-node-mark{grid-row:1/3;font-size:13px;margin-top:3px}.reading-tromethamine .reading-cover-diagram .diagram-node-detail{grid-column:2}.reading-tromethamine .reading-cover-diagram .diagram-formulation-hub .diagram-root{bottom:44px}.reading-tromethamine .reading-cover-diagram .diagram-formulation-hub .role-result{bottom:7px;font-size:12px}
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/* FV: compare the subject of each source, keep formulation scopes visible. */
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