@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=Libre+Caslon+Display&family=Noto+Sans+KR:wght@400;500;600&family=Noto+Serif+KR:wght@400&display=swap');
:root{--paper:#f4f8fa;--ink:#3a3a3c;--muted:#58585a;--line:#d3e4e5;--green:#176d83;--surface:#e7f3f2;--accent:#5fc6c0;--error:#a33324;--serif:'Libre Caslon Display',Georgia,serif;--sans:'DM Sans',Arial,sans-serif;--space:clamp(22px,5.6vw,94px);--radius:0}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--sans)}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--green);outline-offset:5px}a:hover{text-decoration:underline;text-underline-offset:5px}p,h1,h2,h3{margin:0}h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.06}em{font-weight:400}img{display:block;width:100%;object-fit:cover}svg{display:block}.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}.skip{position:fixed;left:20px;top:-100px;z-index:5;background:var(--paper);padding:10px}.skip:focus{top:12px}[hidden]{display:none!important}
.topnote{margin:0 var(--space);padding:13px 0;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.08em;text-transform:uppercase;display:flex;justify-content:space-between}.header{margin:0 var(--space);display:flex;align-items:center;justify-content:space-between;padding:28px 0}.wordmark{display:flex;align-items:center;gap:14px;font-family:var(--serif);font-size:46px;line-height:.8;letter-spacing:-1px}.wordmark:hover{text-decoration:none}.sigma{font-family:Georgia,serif;font-size:45px}.wordmark-sub{display:block;font:8px/1 var(--sans);letter-spacing:2.5px;margin-top:10px}.header nav{display:flex;gap:35px;align-items:center;font-size:12px}.header nav .active{text-decoration:underline;text-underline-offset:8px}.header nav a:last-child{padding:11px 17px;border:1px solid var(--ink)}
.eyebrow{font-size:10px;letter-spacing:.14em;text-transform:uppercase;font-weight:500}.intro{padding:62px var(--space) 58px}.intro h1{font-size:clamp(64px,8.6vw,134px);letter-spacing:-.045em;margin-top:24px}.intro h1 em{color:var(--green)}.intro-bottom{display:flex;align-items:flex-end;justify-content:space-between;margin-top:32px}.intro-bottom p{color:var(--muted);font-size:15px}.textlink{font-size:12px;border-bottom:1px solid var(--ink);padding-bottom:8px;display:inline-flex;gap:30px;align-items:center}.textlink:hover{text-decoration:none;opacity:.7}
.featured{margin:0 var(--space);display:grid;grid-template-columns:1.4fr 1fr;background:var(--surface);min-height:430px}.featured .feature-image{overflow:hidden;display:block;min-height:430px}.featured img{height:100%;min-height:430px;transition:transform .7s}.featured .feature-image:hover img{transform:scale(1.025)}.feature-copy{padding:clamp(28px,4vw,65px);display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.feature-copy h2{font-size:clamp(38px,4vw,64px);letter-spacing:-.035em;margin:27px 0 18px}.feature-copy>p{color:var(--muted);font-size:13px;line-height:1.8;margin-bottom:23px}.meta{font-size:10px;color:var(--muted);letter-spacing:.035em}.feature-copy .textlink{margin-top:30px}.loading-feature{padding:50px;grid-column:1/-1;color:var(--muted)}
.latest{padding:86px var(--space) 90px}.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:32px}.section-head h2{font-size:clamp(42px,4.4vw,66px);letter-spacing:-.025em;margin-top:12px}.section-head>p{font-size:12px;color:var(--muted)}.tools{display:flex;justify-content:space-between;gap:25px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);align-items:center}.categories{display:flex;gap:9px;flex-wrap:wrap}.categories button{background:transparent;border:1px solid transparent;border-radius:var(--radius);color:var(--muted);font-size:11px;padding:8px 15px}.categories button.selected{background:var(--green);color:var(--paper)}.categories button:hover{border-color:var(--line)}#searchform{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line);min-width:210px}#searchform input{border:0;background:none;color:var(--ink);font-size:11px;padding:10px 0;width:175px;min-width:0}#searchform button{background:none;border:none;color:var(--ink);padding:8px}.resultlabel{font-size:12px;color:var(--muted);min-height:20px;margin-top:15px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;margin-top:13px}.card-image{display:block;overflow:hidden;aspect-ratio:1.48;background:var(--surface)}.card-image img{height:100%;transition:transform .6s}.card-image:hover img{transform:scale(1.035)}.card .eyebrow{margin-top:22px;font-size:9px}.card h3{font-size:33px;letter-spacing:-.02em;margin:12px 0 15px;max-width:350px}.card>p{font-size:12px;color:var(--muted);margin-bottom:18px;line-height:1.8}.card .meta{border-top:1px solid var(--line);padding-top:15px;display:flex;justify-content:space-between}.paging{text-align:center;margin-top:35px}.button{display:inline-flex;background:var(--green);color:var(--paper);padding:15px 24px;border:1px solid var(--green);gap:40px;font-size:12px;border-radius:var(--radius)}.button:hover{text-decoration:none;background:var(--ink)}.error{color:var(--error);grid-column:1/-1}.error button{margin-top:16px}.empty{grid-column:1/-1;padding:35px 0;color:var(--muted)}
.about{padding:70px var(--space);background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.about-body{display:grid;grid-template-columns:1.35fr 1fr;gap:80px;margin-top:25px}.about h2{font-size:clamp(42px,4.7vw,69px);letter-spacing:-.025em}.about p{font-size:13px;color:var(--muted);margin-bottom:19px;line-height:1.95}.about .textlink{margin-top:9px}.contact{padding:75px var(--space);display:flex;justify-content:space-between;align-items:center;gap:40px}.contact h2{font-size:clamp(45px,4.8vw,70px);letter-spacing:-.025em;margin-top:20px}.contact p{font-size:13px;color:var(--muted);margin-bottom:24px}footer{margin:0 var(--space);border-top:1px solid var(--line);padding:40px 0 20px}.footer-brand{font-family:var(--serif);font-size:35px}.footer-brand em{color:var(--muted)}.footer-details{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);padding:19px 0 32px}.backtop{color:var(--ink)}.footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:25px;font-size:9px;color:var(--muted)}
.article{padding:50px var(--space) 75px}.article-back{margin-bottom:45px}.article-heading{max-width:950px;margin:0 auto;text-align:center}.article-heading h1{font-size:clamp(48px,6.6vw,88px);letter-spacing:-.03em;margin:24px 0}.article-heading .meta{margin:20px 0 40px}.article-cover{max-height:600px;aspect-ratio:2;margin:0 auto 45px}.article-body{max-width:720px;margin:auto;font-size:17px;line-height:1.95}.article-body p{margin-bottom:25px}.article-end{max-width:720px;margin:45px auto 0;display:flex;gap:25px;align-items:center}.article-end button{border:0;background:none;color:var(--ink);font-size:12px;padding:10px 0;border-bottom:1px solid var(--ink)}
@media(min-width:1650px){body{max-width:2000px;margin:auto}}
@media(max-width:900px){.featured{grid-template-columns:1.1fr 1fr;min-height:360px}.featured .feature-image,.featured img{min-height:360px}.feature-copy{padding:28px}.feature-copy h2{font-size:42px}.grid{gap:20px}.card h3{font-size:29px}.about-body{gap:40px}.header nav{gap:20px}.intro{padding-top:45px}}
@media(max-width:640px){.topnote{font-size:8px;letter-spacing:.025em}.topnote span{display:none}.header{padding:25px 0}.wordmark{font-size:39px;gap:10px}.sigma{font-size:36px}.wordmark-sub{font-size:7px}.header nav{gap:18px}.header nav a{font-size:10px}.header nav a:nth-child(2){display:none}.header nav a:last-child{padding:9px 11px}.intro{padding-top:34px;padding-bottom:36px}.intro .eyebrow{font-size:8px}.intro h1{font-size:65px;margin-top:20px}.intro-bottom{display:block;margin-top:22px}.intro-bottom p{font-size:13px}.intro-bottom .textlink{margin-top:24px}.desktop{display:none}.featured{grid-template-columns:1fr}.featured .feature-image,.featured img{min-height:0;height:auto;aspect-ratio:1.5}.feature-copy{padding:32px 28px}.feature-copy h2{font-size:43px;margin:18px 0}.feature-copy .textlink{margin-top:12px}.latest{padding-top:52px;padding-bottom:50px}.section-head>p{display:none}.section-head h2{font-size:43px}.tools{display:block;padding:12px 0 18px}.categories{gap:3px}.categories button{font-size:10px;padding:8px 10px}#searchform{margin-top:13px}#searchform input{width:100%;font-size:12px}.grid{grid-template-columns:1fr;gap:38px}.card h3{max-width:none;font-size:36px}.card>p{font-size:13px}.card-image{aspect-ratio:1.6}.about{padding:43px var(--space)}.about-body{grid-template-columns:1fr;gap:28px}.about h2{font-size:43px}.contact{display:block;padding:48px var(--space)}.contact h2{font-size:50px}.contact>div+div{margin-top:28px}.footer-details{align-items:flex-end;gap:10px;font-size:10px}.footer-bottom{flex-direction:column;gap:9px;font-size:9px}.article{padding-top:30px}.article-heading h1{font-size:52px}.article-cover{aspect-ratio:1.5}.article-body{font-size:16px}.article-end{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Sigma clinic identity and bilingual typography */
.header-right{display:flex;align-items:center;gap:28px}.wordmark{display:block;line-height:1;letter-spacing:normal}.clinic-logo{width:190px;height:auto;object-fit:contain}.wordmark-sub{font:8px/1.4 var(--sans);letter-spacing:2.5px;margin-top:9px;text-align:right;color:var(--muted)}.language-switch{display:flex;gap:9px;white-space:nowrap;align-items:center;font-size:11px}.language-switch a{padding:6px 0}.language-switch a[aria-current]{color:var(--green);font-weight:600;border-bottom:2px solid var(--accent)}.language-switch span{color:var(--line)}.footer-brand img{width:185px;height:auto;object-fit:contain}.intro h1 em,.about h2 em,.contact h2 em{color:var(--green)}.topnote{border-bottom:2px solid var(--accent)}html[lang="ko"]{--sans:'Noto Sans KR','Apple SD Gothic Neo','Malgun Gothic',Arial,sans-serif;--serif:'Noto Serif KR','Batang',Georgia,serif}html[lang="ko"] h1,html[lang="ko"] h2,html[lang="ko"] h3{word-break:keep-all;line-height:1.35;letter-spacing:-.055em}html[lang="ko"] .intro h1{font-size:clamp(54px,6.5vw,92px);font-weight:400}html[lang="ko"] .feature-copy h2{font-size:clamp(31px,3.2vw,45px)}html[lang="ko"] .card h3{font-size:27px}html[lang="ko"] .about h2{font-size:clamp(34px,3.7vw,52px)}html[lang="ko"] .article-heading h1{font-size:clamp(38px,5vw,65px)}html[lang="ko"] em{font-style:normal}html[lang="ko"] .eyebrow{letter-spacing:.065em}html[lang="ko"] .article-body{line-height:2.1;word-break:keep-all}.translation-note{font:12px/1.8 var(--sans);color:var(--muted);background:var(--surface);padding:15px;margin-bottom:25px}.feature-copy>p{word-break:keep-all}
@media(max-width:900px){.header-right{gap:18px}.clinic-logo{width:165px}.header nav{gap:16px}.language-switch{font-size:10px}}
@media(max-width:640px){.header{flex-wrap:wrap;gap:18px;align-items:center}.clinic-logo{width:150px}.header-right{gap:15px}.header nav a:nth-child(1){display:none}.header nav a:last-child{font-size:10px;padding:8px}.language-switch{gap:6px;font-size:10px}.wordmark-sub{font-size:7px;letter-spacing:1.5px}html[lang="ko"] .intro h1{font-size:52px}html[lang="ko"] .section-head h2{font-size:36px}html[lang="ko"] .about h2{font-size:32px}html[lang="ko"] .contact h2{font-size:41px}html[lang="ko"] .feature-copy h2{font-size:32px}html[lang="ko"] .card h3{font-size:28px}html[lang="ko"] .article-heading h1{font-size:37px}}
@media(max-width:370px){.clinic-logo{width:126px}.header-right{gap:9px}.header nav a:last-child{padding:6px}.language-switch{font-size:9px}}

.article-sources{max-width:720px;margin:30px auto 0;font:12px/1.8 var(--sans)}.article-sources:empty{display:none}.article-sources h2{font:500 12px/1.8 var(--sans);margin-bottom:10px}.article-sources ul{padding-left:18px;margin:0}.article-sources li{margin:7px 0}.article-sources a{text-decoration:underline;text-underline-offset:3px;color:var(--green)}