.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid #167b70;outline-offset:4px}.skip-link{position:fixed;left:16px;top:-100px;z-index:400;background:#143438;color:#fff;padding:12px 20px;border-radius:8px}.skip-link:focus{top:12px}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;color:var(--soft);font-size:14px;padding:28px 0}.breadcrumbs a:hover{text-decoration:underline}.symptoms-intro{padding-bottom:56px}.symptoms-intro-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:64px;align-items:center;padding:24px 0}.symptoms-intro h1{font-size:clamp(38px,5.5vw,64px);line-height:1.1;margin:14px 0 20px;max-width:750px}.section-kicker{font-size:14px;color:#167b70;font-weight:700}.intro-lead{font-size:18px;line-height:1.75;max-width:68ch;margin:0 0 28px}.library-note{padding:34px;border:1px solid #c8e7de;background:#e7faf6;border-radius:24px}.library-note-icon{display:grid;place-items:center;width:52px;height:52px;background:#fff;border-radius:14px;font-size:27px;color:#167b70;margin-bottom:23px}.library-note strong{font-size:27px;line-height:1.25;display:block}.library-note p{font-size:16px;line-height:1.65}.library-note>span:last-child{display:block;border-top:1px solid #b8ddd3;padding-top:18px;font-weight:700;color:#25665d;font-size:14px}.symptoms-section{padding-bottom:76px;scroll-margin-top:110px}.symptoms-section h2{font-size:clamp(28px,3vw,38px);line-height:1.2}.symptoms-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.symptom-card{min-width:0;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:border-color .18s,box-shadow .18s}.symptom-card:hover{border-color:#6bb4a5;box-shadow:0 8px 24px #1434380c}.symptom-card img{display:block;width:100%;height:196px;object-fit:contain;background:#f4f8f6}.symptom-card-copy{padding:23px;flex:1;display:flex;flex-direction:column}.symptom-card h3{font-size:23px;line-height:1.2;margin:0 0 10px}.symptom-card p{font-size:15px;margin:0 0 22px;line-height:1.6;max-width:36ch}.symptom-card-copy>span{display:flex;justify-content:space-between;margin-top:auto;font-size:14px;font-weight:700;color:#167b70}.symptom-card-copy>span>span{font-size:22px;line-height:1}.evidence-note{margin:30px 0 40px;padding:23px 26px;border-left:4px solid #479e8e;background:#f0f7f4;border-radius:0 12px 12px 0}.evidence-note strong{font-size:17px}.evidence-note p{font-size:15px;margin:6px 0 0;max-width:90ch}.topic-hero-art{width:100%;height:auto;border-radius:24px}.topic-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.topic-tabs a{padding:10px 16px;border:1px solid var(--line);border-radius:50px;font-size:14px;background:#fff;font-weight:650}.topic-tabs a[aria-current=page]{background:#143438;color:white;border-color:#143438}.research-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.research-card{display:flex;flex-direction:column;min-width:0;padding:28px;background:#fff;border:1px solid var(--line);border-radius:18px}.research-card-meta{display:flex;gap:12px;justify-content:space-between;color:#526b6e;font-size:13px}.research-card h3{font-size:23px;line-height:1.35;margin:19px 0 12px}.research-card h3 a:hover{color:#167b70;text-decoration:underline}.research-card p{font-size:15px;line-height:1.75;margin:0 0 24px}.research-read{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;margin-top:auto;font-size:14px;color:#167b70;font-weight:750}.research-filters .search-box:focus-within{outline:3px solid #167b70;outline-offset:3px}.research-filters .search-box input{outline:0}.research-filters input,.research-filters select{min-width:0}.source-reference{padding:24px;border:1px solid var(--line);border-radius:14px;background:#fff;overflow-wrap:anywhere}.source-reference p{font-size:14px}.source-reference a{color:#167b70;text-decoration:underline}.article-content a{color:#167b70;text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}.article-content{overflow-wrap:anywhere}.article-toc{padding-left:20px}.article-toc li{margin:10px 0}.article-toc a{font-size:14px;line-height:1.5}.article-content h2{scroll-margin-top:110px}.article-cover.large.topic-cover{background-size:contain;background-repeat:no-repeat;box-shadow:none}.article-hero.research-article h1{font-size:clamp(32px,4.5vw,53px);line-height:1.13}.home-research{padding-top:72px;padding-bottom:72px}.home-research .symptoms-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:15px}.home-research .symptom-card img{height:136px}.home-research .symptom-card-copy{padding:18px}.home-research .symptom-card h3{font-size:20px}.home-research .symptom-card p{font-size:14px}.home-research .section-heading{max-width:700px}.header-inner{gap:16px}.desktop-nav a{padding:10px 9px}.site-footer a,.site-footer button{font-size:14px}.footer-grid p{font-size:14px}.footer-bottom{font-size:12px}.privacy-panel>p{font-size:14px}.privacy-options small,.privacy-options em{font-size:12px}
@media(max-width:1100px){.home-research .symptoms-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.header-cta{display:none}}
@media(max-width:780px){.symptoms-intro-grid{grid-template-columns:1fr;gap:28px;padding-top:16px}.library-note{padding:26px}.library-note strong br{display:none}.symptoms-intro{padding-bottom:25px}.symptoms-grid,.home-research .symptoms-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-hero-art{max-width:420px}.research-grid{gap:16px}.research-card{padding:22px}.research-card h3{font-size:21px}.intro-lead{font-size:17px}.research-filters{flex-wrap:wrap}.research-filters .search-box{flex-basis:100%}.research-filters>label:has(select){flex:1}.research-filters select{width:100%}}
@media(max-width:520px){.research-grid{grid-template-columns:1fr}.symptoms-grid,.home-research .symptoms-grid{grid-template-columns:1fr}.symptom-card{flex-direction:row}.symptom-card img,.home-research .symptom-card img{width:110px;height:auto;min-height:164px;object-fit:contain}.symptom-card-copy,.home-research .symptom-card-copy{padding:18px}.symptom-card h3{font-size:21px}.symptom-card p{font-size:14px;margin-bottom:14px}.symptoms-intro h1{font-size:38px}.symptoms-intro h1 br{display:none}.evidence-note{padding:19px 20px}.research-card-meta{flex-wrap:wrap}.research-filters{flex-direction:row}.research-filters .search-box{width:100%}.research-filters button,.research-filters>a{flex:1}.topic-tabs{gap:7px}.topic-tabs a{font-size:13px;padding:9px 12px}.breadcrumbs{font-size:13px}.home-research{padding-top:52px;padding-bottom:52px}}
.article-hero .back-link{display:block;width:fit-content;margin-bottom:14px;font-size:14px}.article-hero .section-kicker{display:block;margin-bottom:18px}.article-byline{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:13px;line-height:1.6}.article-meta{font-size:12px}.article-content .article-tags{font-size:13px}
.topic-explorer .symptoms-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.topic-explorer .symptom-card{flex-direction:column}
.topic-explorer .symptom-card img{width:100%;height:150px;min-height:0;object-fit:cover}
.topic-explorer .symptom-card-copy{padding:17px;gap:14px}
.topic-explorer .symptom-card h3{font-size:18px;line-height:1.35;margin:0;min-height:49px}
.topic-explorer .symptom-card-copy>span{font-size:13px}
.topic-explorer .symptom-card[aria-current=true]{border-color:var(--teal,#159f8f);box-shadow:0 0 0 2px var(--teal,#159f8f)}
.topic-spotlight{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.65fr);gap:40px;margin-top:36px;padding:30px;background:#f0f7f4;border:1px solid var(--line);border-radius:24px;scroll-margin-top:105px}
.topic-spotlight>img{width:100%;height:100%;max-height:410px;min-height:260px;object-fit:cover;border-radius:15px}
.topic-spotlight-copy{align-self:center;min-width:0}.topic-spotlight h2{margin:12px 0 18px;font-size:clamp(26px,3vw,38px)}
.topic-spotlight p{font-size:16px;line-height:1.75}.topic-spotlight-note{border-top:1px solid var(--line);padding-top:17px}
.topic-spotlight-actions{display:flex;align-items:center;flex-wrap:wrap;gap:20px;margin-top:24px}
.topic-hero-art{max-height:380px;object-fit:cover}.article-cover.large.topic-cover{background-size:cover}
.topic-switcher{margin-bottom:28px;border-bottom:1px solid var(--line)}.topic-switcher summary{cursor:pointer;font-weight:700;padding:16px 0}.topic-switcher .topic-tabs{padding-top:12px}
.topic-sources{padding:0 0 36px;margin-bottom:32px;border-bottom:1px solid var(--line)}.topic-sources h2{font-size:26px}.topic-sources p{font-size:16px}
.topic-source-links{display:flex;flex-wrap:wrap;gap:15px 28px}.topic-source-links a{color:#167b70;text-decoration:underline;overflow-wrap:anywhere;font-weight:650}
.article-reference{margin-top:32px}.article-content .article-reference h2{margin:0 0 12px;font-size:25px}.article-reference p:last-child{margin-bottom:0;color:var(--soft)}
@media(max-width:1100px){.topic-explorer .symptoms-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-spotlight{gap:26px}}
@media(max-width:780px){.topic-explorer .symptoms-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.topic-explorer .symptom-card img{height:135px}.topic-spotlight{grid-template-columns:1fr;padding:24px;gap:24px}.topic-spotlight>img{height:260px;max-width:100%;min-height:0}.topic-spotlight h2{font-size:30px}}
@media(max-width:520px){.topic-explorer .symptoms-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-explorer .symptom-card img{height:125px}.topic-explorer .symptom-card-copy{padding:13px;gap:10px}.topic-explorer .symptom-card h3{font-size:16px;min-height:44px}.topic-explorer .symptom-card-copy>span{font-size:12px}.topic-spotlight{padding:20px;margin-top:26px}.topic-spotlight>img{height:210px}.topic-spotlight-actions{align-items:flex-start;flex-direction:column;gap:16px}.topic-source-links{flex-direction:column}}
@media(prefers-reduced-motion:reduce){.topic-explorer .symptom-card{transition:none}}

/* Authors and video library — 2.2.0 */
.hero-authors{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:28px;background:var(--white);box-shadow:var(--small-shadow);min-width:0}
.hero-authors>img{display:block;width:100%;height:365px;object-fit:cover;object-position:50% 53%}
.hero-authors figcaption{padding:20px 24px 22px}
.hero-authors figcaption>strong{display:block;font-size:24px;line-height:1.3;margin:6px 0}
.hero-authors figcaption>span:last-of-type{font-size:13px;color:var(--soft)}
.author-emails{display:grid;gap:9px;margin-top:15px;padding-top:15px;border-top:1px solid var(--line)}
.author-emails a{display:flex;gap:12px;align-items:baseline;font-size:14px;font-weight:650;overflow-wrap:anywhere}
.author-emails small{min-width:32px;font-size:12px;color:var(--soft);font-weight:400}
.author-emails a:hover,.student-email:hover,.contact-card a:hover{text-decoration:underline}
.student-email{display:block;margin-top:7px;font-size:13px;color:var(--mint-deep);overflow-wrap:anywhere}
.student-card>div,.contact-card>div{min-width:0}.contact-card a{overflow-wrap:anywhere}
.school-contact{margin-top:34px}.school-contact h2{font-size:28px}
.video-empty{max-width:720px;margin:0 auto;padding:45px 36px;text-align:center;border:1px solid var(--line);border-radius:26px;background:var(--white)}
.video-empty-icon{display:grid;place-items:center;width:76px;height:76px;margin:0 auto 24px;border-radius:22px;background:var(--mint-pale);color:var(--ink);font-size:43px;line-height:1}
.video-empty h2{font-size:clamp(28px,4vw,40px);margin:14px 0}.video-empty p{max-width:54ch;margin:0 auto 27px;font-size:16px;line-height:1.8}
.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.video-card{min-width:0;overflow:hidden;background:var(--white);border:1px solid var(--line);border-radius:22px;scroll-margin-top:110px}
.video-player{aspect-ratio:16/9;background:var(--mint-pale);position:relative}.video-play{position:relative;width:100%;height:100%;display:grid;place-items:center;border:0;padding:0;background:var(--mint-pale);cursor:pointer}
.video-play img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.play-symbol{z-index:1;display:grid;place-items:center;width:68px;height:68px;border-radius:50%;background:var(--ink);color:var(--white);font-size:27px;padding-left:4px}
.video-play:focus-visible{outline:4px solid var(--ink);outline-offset:-5px}.video-play:hover .play-symbol{background:var(--mint-deep)}
.video-player iframe,.video-player video{display:block;width:100%;height:100%;border:0;background:var(--ink)}.video-card-copy{padding:25px}.video-card-copy h2{font-size:24px;line-height:1.3;overflow-wrap:anywhere;margin-bottom:12px}.video-card-copy p{font-size:15px;line-height:1.7;overflow-wrap:anywhere}.video-service-note{font-size:13px;margin-top:24px}
@media(max-width:1100px){.desktop-nav{gap:2px}.desktop-nav a{padding:10px 11px}.hero-authors>img{height:330px}}
@media(max-width:780px){.hero-authors{width:100%;max-width:500px;margin:12px auto 0}.hero-authors>img{height:370px}.video-grid{grid-template-columns:1fr}}
@media(max-width:540px){.hero-authors>img{height:320px}.hero-authors figcaption{padding:20px}.hero-authors figcaption>strong{font-size:22px}.author-emails a{font-size:13px}.video-empty{padding:30px 20px}.video-card-copy{padding:20px}}

/* Author portraits, school photograph and native YouTube player — 2.3.0 */
.student-card{grid-template-columns:90px minmax(0,1fr);gap:18px;padding:20px}.student-card+.student-card{margin-left:0}
.student-portrait{position:relative;display:block;width:90px;aspect-ratio:1;overflow:hidden;border-radius:20px;background:var(--mint-pale)}
.student-portrait img{position:absolute;display:block;width:342.857%;max-width:none;height:auto}
.student-portrait-inci img{left:-75%;top:-150%}.student-portrait-seid img{left:-178.571%;top:-146.429%}
.school-feature{grid-template-columns:1.1fr 1fr;align-items:stretch}.school-photo{margin:0;display:flex;flex-direction:column;background:var(--mint-pale);color:var(--ink);min-width:0}
.school-photo>img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}.school-photo figcaption{padding:14px 22px;font-size:12px;margin-top:auto}.school-photo a{text-decoration:underline;text-underline-offset:3px}
.school-feature .fact-copy{padding:36px}.school-feature h2{font-size:32px}.video-player{min-height:200px}
@media(max-width:780px){.school-feature{grid-template-columns:1fr}.school-feature .fact-copy{padding:30px}.school-photo>img{max-height:440px}}
@media(max-width:400px){.student-card{grid-template-columns:76px minmax(0,1fr);gap:13px;padding:16px}.student-portrait{width:76px;border-radius:16px}.student-email{font-size:12px}.school-feature .fact-copy{padding:26px}.school-feature h2{font-size:28px}}