:root{--ink:#22272b;--soft:#4a5157;--link:#0b5a7a;--rule:#c9cbc8;--line:#e3e4e1;--panel:#efeeea;--green:#2f6b3d}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%}
body{background:#fff;color:var(--ink);font:17px/1.75 "Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:var(--link)}
img{max-width:100%}
.wrap{max-width:1300px;margin:0 auto;padding:0 40px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:6px 10px;z-index:9}
:focus-visible{outline:2px solid var(--link);outline-offset:2px}

/* header */
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:132px}
.logo{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink)}
.logo svg{width:52px;height:52px;flex:none}
.logo span{font:700 30px/1 "Source Sans 3",sans-serif;letter-spacing:-.01em}
.logo small{display:block;font:400 15px/1.3 "Source Sans 3",sans-serif;color:var(--soft);letter-spacing:0;margin-top:6px}
.nav{display:flex;gap:34px;align-items:center;font-size:18px}
.nav a{color:var(--ink);text-decoration:none}
.nav a:hover,.nav a[aria-current]{color:var(--link);text-decoration:underline;text-underline-offset:4px}
.nav svg{width:22px;height:22px;display:block}
.nav a{flex-shrink:0}

/* home feature */
.feature{display:grid;grid-template-columns:65% 35%;background:var(--panel)}
.feature>a{display:block;min-width:0}
.feature img{width:100%;height:340px;object-fit:cover;display:block}
.feature .txt{padding:22px 34px}
.feature .txt div{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:30px 0 34px;height:100%}
.feature h2{font:600 25px/1.3 "Source Sans 3",sans-serif;margin-bottom:18px}
.feature h2 a{text-underline-offset:4px;text-decoration-thickness:1.5px}
.feature p{font:400 17.5px/1.7 "Source Serif 4",Georgia,serif;color:#454a4f}

/* card grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:52px;padding:32px 0 70px}
.item{border-top:3px solid var(--rule);padding-top:16px}
.item img{width:100%;height:auto;aspect-ratio:6/5;object-fit:cover;display:block;margin-bottom:22px;background:var(--panel)}
.item h3{font:400 21px/1.3 "Source Sans 3",sans-serif;margin-bottom:12px}
.item h3 a{text-underline-offset:4px;text-decoration-thickness:1px}
.item p{font-size:16.5px;line-height:1.85;color:var(--soft)}

/* link lists */
.lists{border-top:1px solid var(--rule);padding:56px 0 64px;display:grid;grid-template-columns:repeat(3,1fr);column-gap:52px}
.lists>div{display:grid;grid-row:span 2;grid-template-rows:subgrid}
.lists h2{font:600 22px/1.3 "Source Sans 3",sans-serif;margin-bottom:14px}
.lists h2 a{color:var(--ink);text-decoration:none}
.lists ul{list-style:none;padding:0;display:grid;grid-template-rows:repeat(4,1fr)}
.lists li{padding:9px 0;border-bottom:1px solid var(--line);font-size:17px;line-height:1.5;display:flex;align-items:center}
.lists li a{text-decoration:none}.lists li a:hover{text-decoration:underline}

.about{background:var(--panel)}
.about .wrap{display:grid;grid-template-columns:1fr 2fr;gap:52px;padding-top:48px;padding-bottom:48px}
.about h2{font:600 22px/1.3 "Source Sans 3",sans-serif}
.about p{font:400 17.5px/1.75 "Source Serif 4",Georgia,serif;color:#454a4f;max-width:46em}
.about p+p{margin-top:12px}

/* hub */
.hubhead{background:var(--panel);padding:44px 0 40px}
.hubhead h1{font:600 38px/1.2 "Source Sans 3",sans-serif;margin-bottom:12px}
.hubhead p{font:400 18px/1.7 "Source Serif 4",Georgia,serif;color:#454a4f;max-width:44em}

/* article */
.crumbs{font-size:15px;color:var(--soft);padding:22px 0 0}
.crumbs a{color:var(--soft)}
.art{display:grid;grid-template-columns:minmax(0,720px) 260px;gap:72px;padding:20px 0 72px}
.art article{min-width:0;overflow-wrap:anywhere}
.mobile-toc{display:none;margin-bottom:24px;font-size:16px}
.mobile-toc summary{cursor:pointer;color:var(--link);padding:10px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.mobile-toc ol{padding:12px 0 0 22px}
.mobile-toc li+li{margin-top:8px}
.article-head{max-width:1000px;margin:0 auto;padding:28px 0 12px;text-align:center}
.article-head h1{font:600 40px/1.25 "Source Sans 3",sans-serif;letter-spacing:-.01em;margin:6px 0 16px;text-wrap:balance}
.article-head .dek{max-width:880px;margin:0 auto 28px;text-wrap:balance}
.article-head .byline{justify-content:center;margin-bottom:0}
.dek{font:400 20px/1.6 "Source Serif 4",Georgia,serif;color:#454a4f;margin-bottom:28px}
.byline{display:flex;flex-wrap:wrap;gap:16px;font-size:15px;color:var(--soft);margin:-12px 0 24px}
.hero{margin:0 0 34px}
.hero img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;display:block;background:var(--panel)}
.hero figcaption{font-size:14px;color:var(--soft);padding-top:8px;line-height:1.5}
.hero figcaption a{color:var(--soft)}
.body{font:400 18.5px/1.8 "Source Serif 4",Georgia,serif}
.body>*+*{margin-top:1.1em}
.body h2{font:600 27px/1.3 "Source Sans 3",sans-serif;margin-top:2em;padding-top:18px;border-top:1px solid var(--rule)}
.body h3{font:600 21px/1.35 "Source Sans 3",sans-serif;margin-top:1.6em}
.body ul,.body ol{padding-left:1.3em}
.body li+li{margin-top:.4em}
.body blockquote{border-left:3px solid var(--green);padding:2px 0 2px 18px;color:#454a4f}
.body table{width:100%;border-collapse:collapse;font:16px/1.5 "Source Sans 3",sans-serif;display:block;overflow-x:auto}
.body th,.body td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--line)}
.body th{border-bottom:2px solid var(--ink);font-weight:700;white-space:nowrap}
.body .answer{background:var(--panel);padding:20px 24px;border-top:3px solid var(--green)}
.body .answer>*+*{margin-top:.7em}
.body .product-photo{margin:24px 0;text-align:center}
.product-photo img{display:block;width:100%;height:300px;object-fit:contain;margin:0 auto}
.product-photo figcaption{font-size:14px;line-height:1.5;margin-top:10px}
.sources{font:15.5px/1.6 "Source Sans 3",sans-serif;color:var(--soft)}
.side{position:sticky;top:24px;align-self:start;font-size:16px;line-height:1.5}
.side h2{font:600 16px/1.3 "Source Sans 3",sans-serif;margin-bottom:10px}
.side ol{list-style:none;padding:0;border-top:3px solid var(--rule)}
.side li{border-bottom:1px solid var(--line)}
.side li a{display:block;padding:9px 0;text-decoration:none}
.side li a:hover{text-decoration:underline}
.more{border-top:1px solid var(--rule);padding:40px 0 60px}
.more h2{font:600 22px/1.3 "Source Sans 3",sans-serif;margin-bottom:6px}
.more .grid{grid-template-columns:repeat(3,1fr);padding:20px 0 0}

/* plain pages */
.page{max-width:760px;padding:30px 0 72px}
.page h1{font:600 38px/1.2 "Source Sans 3",sans-serif;margin-bottom:22px}
.hubhead .hub-related{margin-top:14px;font:17px/1.6 "Source Sans 3",sans-serif}
.search{max-width:840px;width:100%}
.search label{display:block;margin-bottom:8px}
.search-input{display:flex;gap:10px}
.search input{font:inherit;min-width:0;flex:1;border:1px solid var(--soft);padding:10px 12px;border-radius:0}
.search button{font:600 17px/1.5 "Source Sans 3",sans-serif;color:#fff;background:var(--green);border:0;padding:10px 20px;cursor:pointer}
.search button:hover{background:#24532f}
#search-status{margin:24px 0 12px;color:var(--soft)}
.search-results{list-style:none;padding:0}
.search-results li{border-top:1px solid var(--rule);padding:22px 0}
.search-results h2{font:400 23px/1.35 "Source Sans 3",sans-serif;margin-bottom:8px}
.search-results p{color:var(--soft)}
.search-results [lang=ko]{word-break:keep-all;overflow-wrap:anywhere}

.foot .wrap{display:flex;justify-content:space-between;gap:30px;padding-top:28px;padding-bottom:40px;font-size:15px;color:var(--soft)}
.foot a{color:var(--soft)}
.foot nav{display:flex;gap:18px;flex-wrap:wrap}

/* korean */
:lang(ko) body,:lang(ko) .body,:lang(ko) .dek,:lang(ko) .feature p,:lang(ko) .about p,:lang(ko) .hubhead p{word-break:keep-all;overflow-wrap:anywhere}
:lang(ko) .body,:lang(ko) .dek{font-family:"Source Serif 4","Apple SD Gothic Neo","Noto Sans KR",sans-serif}

@media (max-width:1100px){.art{grid-template-columns:minmax(0,1fr)}.side{display:none}.mobile-toc{display:block}.top .wrap{height:auto;min-height:132px;gap:24px;flex-wrap:wrap;padding-top:24px;padding-bottom:24px}.nav{gap:24px}}
@media (max-width:1000px){
  .grid{grid-template-columns:repeat(2,1fr);gap:40px 28px}
  .more .grid{grid-template-columns:repeat(2,1fr)}
  .lists{grid-template-columns:1fr;row-gap:36px}.lists>div{grid-row:auto;display:block}
}
@media (max-width:760px){
  .wrap{padding:0 18px}
  .top .wrap{height:auto;padding-top:20px;padding-bottom:16px;flex-direction:column;align-items:flex-start;gap:16px}
  .logo svg{width:42px;height:42px}.logo span{font-size:25px}
  .nav{gap:20px;font-size:16px;flex-wrap:wrap}
  .feature{grid-template-columns:1fr}.feature img{height:220px}
  .feature .txt{padding:0 18px 22px}.feature .txt div{border-top:0;padding-top:20px}
  .grid{gap:30px 18px;padding-top:24px}
  .item h3{font-size:18px}.item p{font-size:15px;line-height:1.7}
  .about .wrap{grid-template-columns:1fr;gap:12px}
  .article-head h1{font-size:31px}.dek{font-size:18px}.body{font-size:17.5px}.body h2{font-size:23px}
  .hubhead h1{font-size:30px}
  .foot .wrap{flex-direction:column;gap:8px}
}