@import url('https://fonts.googleapis.com/css2?family=Gowun+Batang:wght@700&family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');:root{--ink:#18201d;--muted:#64716a;--paper:#f6f5ef;--card:#fff;--accent:#ff5d2e;--green:#174d3c;--line:#dfe2da;--serif:'Gowun Batang',serif;--sans:'Noto Sans KR',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.72}.site-header{height:76px;padding:0 max(24px,calc((100% - 1180px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(246,245,239,.92);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}a{color:inherit;text-decoration:none}.brand{display:flex;gap:10px;align-items:center;font-weight:800;font-size:20px}.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--accent);color:white}.site-header 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@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@500;600;700&display=swap');
:root{--ink:#142033;--muted:#64748b;--paper:#f7f9fc;--card:#fff;--accent:#155eef;--green:#0b3a82;--line:#d7dfea;--serif:'Noto Serif KR',serif;--signal:#f6c445;--danger:#c9382b}
body{background:linear-gradient(90deg,var(--accent) 0 7px,var(--paper) 7px);letter-spacing:-.012em}
a,button{transition:color .16s ease,background-color .16s ease,border-color .16s ease,transform .16s ease}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--signal);outline-offset:3px}
.site-header{height:72px;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(20,32,51,.03)}
.brand{letter-spacing:-.035em}.brand-mark{width:34px;height:34px;border-radius:2px;background:var(--accent);font-size:15px}.site-header nav{letter-spacing:-.02em}
.hero{padding-top:84px;padding-bottom:62px}.hero:after{content:'100';right:8px;top:-26px;font-family:var(--sans);font-size:min(26vw,320px);font-weight:800;letter-spacing:-.12em;color:#eaf0fb}
.eyebrow,.section-kicker{color:var(--accent);font-family:var(--sans);font-size:12px;letter-spacing:.04em;text-transform:none}
.hero h1{font-family:var(--sans);font-weight:800;letter-spacing:-.065em;line-height:1.05}.hero h1 em{color:var(--accent)}.hero-copy p{font-size:17px;max-width:580px}
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.hero-meta span:before{content:'—';color:var(--accent)}
.hierarchy-path{border-radius:0;border:0;border-top:3px solid var(--accent);box-shadow:0 10px 30px rgba(20,32,51,.06)}.hierarchy-path li{position:relative;padding:21px 22px}.hierarchy-path li:after{content:'';position:absolute;right:-5px;top:50%;width:9px;height:9px;background:var(--signal);transform:translateY(-50%) rotate(45deg);z-index:2}.hierarchy-path li:last-child:after{display:none}.hierarchy-path b{color:var(--accent);font-variant-numeric:tabular-nums}
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.brand-card{grid-template-columns:54px 1fr;border:0;border-bottom:1px solid var(--line);border-radius:0;min-height:130px;padding:22px 20px}.brand-card:nth-child(odd){border-right:1px solid var(--line)}.brand-card:hover{border-color:var(--line);background:#edf3ff;transform:none}.brand-letter{width:42px;height:42px;border-radius:2px;background:var(--accent);color:#fff}.brand-card>b{left:94px;color:var(--accent)}
.symptom-strip,.method{border-top:2px solid var(--ink)}.symptom{border-radius:2px;border-left:4px solid var(--line)}.symptom:hover{transform:none;border-left-color:var(--accent);background:#edf3ff}
.method li{border-radius:2px;border-top:3px solid var(--accent)}.method li:before{color:var(--accent)}
.library{background:#0d2a59;color:#fff}.library .section-kicker{color:#8cb4ff}.section-head p{color:#b9c7dd}.filter{border-radius:2px;border-color:#526b90}.filter.active,.filter:hover{color:#0d2a59}.guide-grid{gap:1px;background:#526b90;border:1px solid #526b90}.guide-card{border-radius:0;min-height:220px}.guide-card:hover{transform:none;box-shadow:inset 5px 0 0 var(--signal)}.card-no{font-variant-numeric:tabular-nums;color:#dce5f2}.pill{border-radius:2px;background:#e7efff;color:var(--accent)}.card-link{color:var(--accent)}
.book-head{border-bottom:3px solid var(--accent);margin-bottom:28px}.book-head h1,.article-head h1{font-family:var(--sans);font-weight:800;letter-spacing:-.06em}.device-book-grid{gap:1px;background:var(--line);border:1px solid var(--line)}.device-book-card{border:0;border-radius:0}.device-book-card>span,.symptom-chapter small{color:var(--accent)}
.chapter-list{border-radius:0;border-top:3px solid var(--accent)}.chapter-list-head{background:#0d2a59}.symptom-chapter:hover{background:#edf3ff}.chapter-no{font-variant-numeric:tabular-nums;color:#aebbd0}
.article-wrap{max-width:1120px}.article-head{border-bottom:3px solid var(--accent);padding-bottom:34px}.article-layout{grid-template-columns:minmax(0,720px) 270px;gap:72px}.article-body{font-family:var(--serif);line-height:1.95}.article-body h2,.article-body h3,.verified,.warning{font-family:var(--sans)}.article-body h2{border-top:1px solid var(--ink);font-size:27px;letter-spacing:-.04em}.article-body p,.article-body li{font-size:17px}.symptom-definition{border-radius:0;border-left:0;border-top:5px solid var(--accent);box-shadow:0 10px 28px rgba(20,32,51,.06)}.symptom-definition p{font-family:var(--serif);font-size:18px;line-height:1.9}.warning{border-radius:0;background:#fff6dd;border-left-color:var(--signal)}.verified{border-radius:2px;background:#edf3ff}.toc,.trust{border-radius:2px}.toc{border-top:4px solid var(--accent)}.chapter-nav a{border-radius:2px}.chapter-nav a:hover{background:#edf3ff;border-color:var(--accent)}
.review-pill{border-radius:2px;background:#fff0c2;color:#704b00}.review-banner{border-radius:2px;background:#fff6dd;border-color:#e9c34c}
footer{background:#0b1930;border-top:7px solid var(--accent)}
@media(max-width:900px){body{background:var(--paper)}.brand-grid{grid-template-columns:1fr}.brand-card:nth-child(odd){border-right:0}.article-layout{grid-template-columns:1fr}.hero:after{font-size:260px}}
@media(max-width:600px){.hero{padding-top:52px}.hero h1{font-size:43px}.hero:after{top:10px;font-size:160px}.hierarchy-path{border-top-width:3px}.hierarchy-path li:after{display:none}.brand-index{padding-top:54px}.brand-card{min-height:122px}.article-body p,.article-body li{font-size:16px}.search-box{box-shadow:5px 5px 0 var(--signal)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.article-wrap{max-width:1160px;padding-top:32px;overflow:visible}
.article-wrap .breadcrumbs{margin-bottom:32px;font-size:13px;gap:8px}
.article-wrap article{background:transparent}
.article-head{max-width:none;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:56px;align-items:end;margin:0 0 46px;padding:28px 0 46px;border-bottom:1px solid var(--line)}
.article-heading{min-width:0}.article-head h1{font-size:clamp(40px,5.2vw,66px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.055em;text-wrap:balance;word-break:keep-all}
.article-head .dek{max-width:620px;margin:0;color:#637083;font-size:16px;line-height:1.65;word-break:keep-all;text-wrap:pretty}
.article-head .pill{padding:6px 10px;border-radius:999px;background:#e8f0ff;font-size:12px}
.symptom-definition{align-self:stretch;display:flex;flex-direction:column;justify-content:center;margin:0;padding:26px 28px;border:1px solid #cddcff;border-left:0;border-top:0;border-radius:20px;background:linear-gradient(145deg,#f5f8ff,#fff);box-shadow:0 14px 36px rgba(36,82,155,.08)}
.symptom-definition span{display:flex;align-items:center;gap:8px;color:#245dc1;font-size:13px;letter-spacing:0}.symptom-definition span:before{content:'i';display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#245dc1;color:#fff;font:700 12px/1 var(--sans)}
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.article-layout{grid-template-columns:minmax(0,680px) 250px;justify-content:space-between;gap:64px;align-items:start}
.article-body{font-family:var(--sans);line-height:1.78;letter-spacing:-.02em;min-width:0}
.article-body p,.article-body li{font-size:17px;word-break:keep-all;overflow-wrap:anywhere;text-wrap:pretty}
.article-body p{margin:0 0 18px;color:#344054}
.article-body ul{list-style:none;margin:0 0 28px;padding:0;display:grid;gap:10px}
.article-body li{position:relative;margin:0;padding:13px 16px 13px 46px;border:1px solid #e1e7ef;border-radius:12px;background:#fff;color:#344054}
.article-body li:before{content:'✓';position:absolute;left:16px;top:13px;display:grid;place-items:center;width:21px;height:21px;border-radius:50%;background:#e8f6ed;color:#137a3d;font-size:12px;font-weight:800}
.article-body h2{position:relative;margin:64px 0 22px;padding:0 0 14px 22px;border:0;border-bottom:1px solid #dce3ec;font:800 27px/1.35 var(--sans);letter-spacing:-.045em;word-break:keep-all;text-wrap:balance}
.article-body h2:first-child{margin-top:0}.article-body h2:before{content:'';position:absolute;left:0;top:.25em;width:7px;height:1em;border-radius:999px;background:#2864d7}
.article-body h3{margin:22px 0 14px;padding:18px 20px;border:1px solid #d9e3f2;border-left:5px solid #2864d7;border-radius:14px;background:#f8faff;color:#202c3d;font:700 17px/1.62 var(--sans);letter-spacing:-.025em;word-break:keep-all;text-wrap:pretty}
.article-body h3+p{padding-left:2px}
.warning{margin:28px 0;padding:18px 20px;border:1px solid #f1d48a;border-left:5px solid #e8a923;border-radius:12px;background:#fff9e9;color:#513c0b;font-size:15px;line-height:1.7}
.verified{display:inline-block!important;margin:16px 0 8px!important;padding:8px 11px!important;border-radius:8px!important;background:#eef3fa!important;color:#687589!important;font-size:12px!important}
.article-aside{position:relative}.toc,.trust{border:1px solid #dfe6ef;border-radius:16px;background:rgba(255,255,255,.92);box-shadow:0 10px 28px rgba(29,46,74,.05)}
.toc{top:96px;padding:20px 18px;border-top:1px solid #dfe6ef}.toc b{display:block;margin-bottom:11px;font-size:14px}.toc a{padding:8px 4px;border-bottom:1px solid #edf0f4;color:#647184;font-size:13px}.toc a:hover{color:#155eef}.toc .toc-back{border-bottom:0}
.trust{padding:17px 18px}.trust b{color:#344054}.trust p{margin:7px 0 0;line-height:1.65}
.chapter-nav{margin-top:70px}.chapter-nav a{border-radius:12px;background:#fff}.chapter-nav a:hover{background:#f5f8ff}
.ad-slot{display:block;min-height:120px;margin:36px 0;padding:14px 0;border-top:1px solid #e7ebf1;border-bottom:1px solid #e7ebf1;background:#fff;text-align:center;overflow:hidden}.ad-slot>span{display:block;margin-bottom:8px;color:#98a2b3;font:500 10px/1 var(--sans);letter-spacing:.04em}.ad-slot ins{min-height:90px}
.pencil-chooser{margin:-6px 0 52px;padding:28px;border:1px solid #d9e2ef;border-radius:22px;background:#fff;box-shadow:0 18px 48px rgba(30,56,92,.06)}
.pencil-chooser>header{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:22px}.pencil-chooser>header span{color:#155eef;font-size:13px;font-weight:800}.pencil-chooser>header h2{margin:6px 0 0;font-size:25px;line-height:1.35;letter-spacing:-.045em}.pencil-chooser>header p{max-width:300px;margin:0;color:#677489;font-size:14px;line-height:1.6;text-align:right;word-break:keep-all}
.pencil-primary{display:grid;grid-template-columns:1fr 1fr;gap:12px}.pencil-model{position:relative;display:grid;grid-template-columns:58px 1fr;gap:17px;min-height:250px;padding:24px;border-radius:16px;overflow:hidden}.pencil-model.is-first{background:#f2f4f7;color:#202b3a}.pencil-model.is-second{background:#172c52;color:#fff}.pencil-no{display:grid;place-items:center;align-self:start;width:54px;height:54px;border:2px solid currentColor;border-radius:50%;font-size:27px;font-weight:800}.pencil-model .model-name{font-size:13px;font-weight:800;opacity:.7}.pencil-model h3{margin:8px 0 12px;font-size:22px;line-height:1.35;letter-spacing:-.04em}.pencil-model h3 b{color:#155eef}.pencil-model.is-second h3 b{color:#8db7ff}.pencil-model p{margin:0;max-width:350px;font-size:14px;line-height:1.65;opacity:.76;word-break:keep-all}.pencil-model>strong{position:absolute;left:99px;bottom:21px;font-size:13px}.pencil-model.is-first>strong{color:#155eef}.pencil-model.is-second>strong{color:#a9c8ff}
.pencil-secondary{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.pencil-secondary>div{display:flex;justify-content:space-between;gap:16px;padding:14px 17px;border:1px solid #e2e7ee;border-radius:12px;background:#fafbfc;font-size:13px}.pencil-secondary span{color:#687589;text-align:right}.pencil-jump{display:block;margin-top:18px;padding:12px;text-align:center;border-radius:10px;background:#edf3ff;color:#155eef;font-size:13px;font-weight:800}.pencil-jump:hover{background:#dfeaff}
@media(max-width:900px){.article-head{grid-template-columns:1fr;gap:28px}.symptom-definition{min-height:0}.article-layout{grid-template-columns:minmax(0,680px);justify-content:center}.article-aside{display:none}}
@media(max-width:600px){.article-wrap{padding:18px 20px 68px}.article-wrap .breadcrumbs{margin-bottom:18px}.article-head{padding:18px 0 34px;margin-bottom:36px;gap:22px}.article-head h1{font-size:40px}.article-head .dek{font-size:15px}.symptom-definition{padding:21px 20px;border-radius:15px}.symptom-definition p{font-size:16px}.article-body p,.article-body li{font-size:16px}.article-body h2{margin-top:52px;font-size:24px;padding-left:18px}.article-body h3{padding:16px 16px;font-size:16px}.article-body li{padding-left:43px}.chapter-nav{margin-top:52px}.pencil-chooser{margin-top:0;padding:20px 16px;border-radius:16px}.pencil-chooser>header{display:block}.pencil-chooser>header h2{font-size:22px}.pencil-chooser>header p{margin-top:8px;text-align:left}.pencil-primary{grid-template-columns:1fr}.pencil-model{min-height:230px;padding:20px;grid-template-columns:48px 1fr}.pencil-no{width:46px;height:46px;font-size:23px}.pencil-model>strong{left:85px}.pencil-secondary{grid-template-columns:1fr}.pencil-secondary>div{display:block}.pencil-secondary span{display:block;margin-top:3px;text-align:left}}