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/* Catalog visual system, October 2026 */
:root{--ink:#202c3c;--muted:#6c7787;--line:#e7ebf0;--bg:#fafbfc}body{background:var(--bg)}.top{padding:18px 22px;border-bottom:1px solid var(--line);background:#fff}.brand{font-size:17px;letter-spacing:-.02em}.brand-mark{width:34px;height:34px;border-radius:10px;background:#2d527c;color:white;font-size:23px}.brand small{font-size:11px}.primary{background:#2d527c;border-radius:10px;font-size:15px}.badge{color:#52687e;background:#edf1f6}.bottom-nav{box-shadow:none;padding-top:4px}.bottom-nav a{color:#748092;font-size:12px;font-weight:400;min-width:80px;gap:0;padding:5px 16px}.bottom-nav a span{display:block;font-size:21px;line-height:24px}.bottom-nav a[aria-current=page]{color:#2d527c;font-weight:700;background:#edf2f8}.page,.card,.review{box-shadow:none;border-radius:12px}.page h1,.page h2{font-size:25px}.account h1{font-size:28px}.account .primary{margin-top:20px}.catalog main{max-width:720px;padding:32px 22px 42px}.catalog-heading{margin-bottom:30px}.catalog-heading h1{font-size:29px;line-height:1.25;letter-spacing:-.04em;margin:8px 0 10px}.catalog-heading p:not(.eyebrow){font-size:14px;color:var(--muted);margin:0}.catalog-heading .eyebrow{font-size:12px;color:#597597}.browse-label{font-size:11px;letter-spacing:.04em;color:#788493;font-weight:700;margin:28px 0 10px}.browse-list{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}.browse-row{display:flex;gap:14px;align-items:center;min-height:91px;padding:17px 16px}.browse-row+.browse-row{border-top:1px solid var(--line)}.browse-row>span:nth-child(2){flex:1;min-width:0}.browse-row strong{font-size:17px;font-weight:700;display:block}.browse-row small{display:block;font-size:12px;color:var(--muted);margin-top:4px}.browse-row>span:last-child{color:#91a0b0}.browse-row:hover,.resource-row:hover{background:#f4f7fb}.browse-icon{width:39px;height:43px;display:grid;place-items:center;color:#577492;flex-shrink:0}.browse-icon svg,.profile-shortcut svg{width:25px;height:25px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.profile-shortcut{display:grid;place-items:center;min-width:44px;min-height:44px;color:#64768b}.study-shortcut{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted);padding:25px 3px}.study-shortcut strong{color:#2d527c;font-size:14px}.catalog-back{display:inline-flex;align-items:center;min-height:44px;color:#627c97;font-size:13px;margin-bottom:14px}.resource-list{background:white;border-top:1px solid var(--line)}.resource-row{display:flex;gap:12px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--line);min-height:90px}.resource-row>span:first-child{flex:1;min-width:0}.resource-row strong{font-size:17px;display:block}.resource-row small{font-size:12px;color:var(--muted);display:block;margin-top:5px}.file-type{font-size:10px;border:1px solid var(--line);padding:3px 6px;border-radius:4px;color:#788493;white-space:nowrap}.chevron{color:#8e9caf}.downloads{margin-top:24px;background:var(--bg)}.downloads summary{font-size:13px;color:#62748a}.source-caption{font-size:12px;color:var(--muted);padding:18px 5px;line-height:1.7}.catalog .bottom-nav a{min-height:54px}@media(min-width:760px){.catalog main{padding-top:54px}.catalog-heading h1{font-size:36px}.browse-row{min-height:100px}.top{padding-inline:max(24px,calc((100vw - 960px)/2))}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
/* Phone-first learning shell */
:root{--ink:#203746;--muted:#71808b;--bg:#f5f8fa;--line:#e0e8ed}.catalog main{max-width:760px;padding:26px 20px 32px}.top{padding:12px 20px}.brand-mark{background:#267b87;color:white;border-radius:10px}.brand{font-size:16px}.bottom-nav a{flex:1;gap:5px;padding:8px 5px;border-radius:0}.bottom-nav a svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.bottom-nav a span{font-size:11px;line-height:18px}.bottom-nav a[aria-current=page]{background:transparent;color:#147381}.bottom-nav a[aria-current=page] svg{background:#e7f3f4;border-radius:5px}.welcome h1{font-size:28px;line-height:1.35;max-width:330px;margin:8px 0}.welcome p:last-child{color:var(--muted);font-size:14px;margin:8px 0 24px}.eyebrow{color:#467e89}.home-search,.search-box{display:flex;align-items:center;gap:10px;border:1px solid #d8e3e9;border-radius:12px;background:white;min-height:54px;padding:0 15px}.home-search{justify-content:space-between;color:var(--muted);font-size:14px}.home-search span{font-size:27px;color:#327e89}.search-box svg{width:21px;height:21px;fill:none;stroke:#6c8995;stroke-width:1.8;flex-shrink:0}.search-box input{border:0;background:transparent;width:100%;min-width:0;padding:14px 0;color:var(--ink);outline-offset:1px;font-size:16px}.home-section{margin-top:30px}.home-section h2{font-size:17px;margin:0 0 13px}.section-head{display:flex;align-items:baseline;justify-content:space-between}.section-head a{font-size:12px;color:#267c88}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.quick-grid a{display:flex;flex-direction:column;align-items:start;padding:18px 15px;background:white;border:1px solid var(--line);border-radius:13px;gap:5px}.quick-grid strong{font-size:16px}.quick-grid small{font-size:11px;color:var(--muted)}.quick-symbol{font-size:28px;line-height:32px;color:#267c88}.color-dots{display:flex;gap:3px;height:32px;align-items:center}.color-dots i{width:12px;height:12px;border-radius:50%;background:#225ad6}.color-dots i:nth-child(2){background:#c6373f}.color-dots i:nth-child(3){background:#dfb72b}.color-dots i:nth-child(4){background:#258b51}.color-dots i:nth-child(5){background:white;border:1px solid #b8c4cc}.learning-feature{display:block;background:#edf5f6;border:1px solid #d9e9ec;border-radius:14px;padding:21px}.learning-feature h3{font-size:20px;margin:8px 0}.learning-feature p{font-size:12px;color:#657f88;margin:6px 0 22px}.learning-feature strong{font-size:14px;color:#267581}.library-head h1{font-size:29px;margin:6px 0 18px}.library-head .catalog-back{margin:0 0 8px}.library-head{margin-bottom:24px}.library-head .muted{margin-top:-8px}.library-list{border:1px solid var(--line);border-radius:13px;background:white;overflow:hidden}.library-row{display:flex;align-items:center;gap:13px;padding:18px 15px;min-height:85px}.library-row+.library-row{border-top:1px solid var(--line)}.library-row>span:nth-child(2){flex:1}.library-row strong{font-size:16px;display:block}.library-row small{font-size:12px;color:var(--muted);display:block}.library-row .chevron{font-size:25px}.browse-icon{color:#548593;background:#eff6f7;border-radius:9px;width:38px;height:38px}.resource-list{border:1px solid var(--line);border-radius:12px;overflow:hidden}.resource-row{padding:19px 16px;min-height:83px}.resource-row:last-child{border-bottom:0}.resource-row strong{font-size:16px}.empty-search{padding:18px;font-size:14px}.source-caption{padding:16px}.catalog-back{color:#357d89}.search-box:focus-within{border-color:#318893;box-shadow:0 0 0 3px #31889315}#search-results:not([hidden]){margin-top:16px}.primary,.chapter-nav button{background:#267b87}@media(min-width:760px){.catalog main{padding-top:44px}.quick-grid{gap:18px}.welcome h1{max-width:none;font-size:34px}.library-row{padding:20px}.bottom-nav{justify-content:center}.bottom-nav a{flex:0 1 220px}.top{padding-inline:max(24px,calc((100vw - 720px)/2))}}@media print{.bottom-nav{display:none}}
/* Direct symptom articles */
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/* Reading cards replace print-table columns in symptom articles, at every width. */
.topic .fact-list{display:grid;gap:12px;margin:20px 0}.topic .fact-card{border:1px solid #dce6eb;border-radius:12px;overflow:hidden;background:#fff;min-width:0}.topic .fact-card h4{font-size:17px;line-height:1.5;margin:0;padding:13px 16px;background:#edf4f5;color:#244a54;overflow-wrap:normal;word-break:normal}.topic .fact-body{padding:14px 16px;font-size:16px;line-height:1.8;overflow-wrap:break-word}.topic .fact-label{font-size:12px;font-weight:700;color:#687e88;margin:0 0 7px}.topic .page{overflow-wrap:break-word;word-break:normal}.topic .page h2{font-size:24px;line-height:1.4}.topic .page p,.topic .page li{line-height:1.85}.topic .topic-related>.page{padding:18px 14px}.topic-related>summary{line-height:1.55;padding:17px 14px}.topic .note{padding:16px}.topic .note h3{font-size:19px;line-height:1.5}.topic .doctor{overflow-wrap:anywhere}.topic .source{overflow-wrap:anywhere}@media(max-width:480px){.topic main{padding:20px 12px 32px}.topic-main .page{padding:18px 12px}.topic .page h2{font-size:23px}.topic .page ul,.topic .page ol{padding-inline-start:21px}.topic .fact-card h4{padding:12px 14px}.topic .fact-body{padding:13px 14px}.topic .metrics{grid-template-columns:1fr}.topic .top{padding:10px 14px}.topic .top a{font-size:14px}}
.topic-toc{background:white;border:1px solid var(--line);border-radius:10px;margin:16px 0}.topic-toc>summary{font-size:14px;padding:12px 16px;color:#286f7b}.topic-toc nav{display:grid;padding:0 16px 12px}.topic-toc nav a{display:flex;align-items:center;min-height:48px;border-top:1px solid var(--line);font-size:14px}.topic [id]{scroll-margin-top:18px}.algorithm-loading{font:14px/1.6 Rubik,Arial,sans-serif;padding:18px;max-width:290px}.topic-downloads .secondary{text-align:start;background:white;border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:10px 0;font-size:14px;line-height:1.6}.topic .fact-card bdi{white-space:normal}.topic .page .source{font-size:12px!important;line-height:1.7}.topic main{padding-bottom:50px}
/* Plain-language topic content */
.lesson-definition{background:#eaf4f5;border:1px solid #d2e7e9;border-radius:15px;padding:22px;margin:18px 0 24px}.lesson-definition h2{font-size:24px;margin:8px 0 12px}.lesson-definition p{margin:8px 0}.lesson-step{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px;margin:18px 0;position:relative}.lesson-step h2{font-size:22px;margin:8px 0 18px}.step-number{display:inline-block;color:#2c7a85;font-size:12px;font-weight:700;letter-spacing:.08em}.question-list{margin:0}.question-list dt{font-weight:700;font-size:16px;margin-top:18px}.question-list dd{margin:6px 0 0;color:#465d6b;font-size:15px;line-height:1.7}.precision-note{background:#f3f6f8;border-inline-start:3px solid #6b95a3;padding:14px;font-size:14px;line-height:1.7;margin:18px 0}.precision-note strong{display:block;margin-bottom:4px}.vital-strip{display:flex;gap:8px;margin:12px 0 18px}.vital-strip strong{flex:1;background:#eef5f6;border-radius:8px;padding:10px 5px;text-align:center;font-size:13px}.term-link{color:#176c7d;font-weight:700;text-decoration:underline;text-decoration-style:dotted;text-underline-offset:4px}.inline-detail{font-size:14px;color:#176c7d;text-decoration:underline}.lesson-step li{margin:11px 0}.lesson-step ul{padding-inline-start:22px}.lesson-step h3{font-size:18px;margin:24px 0 10px}.urgent-note{border-inline-start:3px solid #b5414e;background:#fff1f2;padding:14px;font-size:14px}.lesson-step .source{line-height:1.7}.topic-downloads small{display:block;color:var(--muted);font-size:12px;text-align:center}.lesson-step,.lesson-definition{scroll-margin-top:15px}@media(max-width:420px){.lesson-step,.lesson-definition{padding:18px}.lesson-step h2{font-size:21px}}