/* 가벼운 단일 CSS. 외부 폰트/CDN 없음: 사용자 기기의 한글 시스템 폰트를 사용한다. */
:root{
  --bg:#f7f8f7;--surface:#fff;--text:#1d2321;--muted:#5c6763;--line:#e1e6e3;
  --accent:#0f766e;--accent-soft:#e3f3f1;--accent-ink:#0b5a54;
  --term:#fff3c4;--term-line:#c79a00;--warn:#fff8e5;--on-accent:#fff;--badge:#c2410c;
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Noto Sans CJK KR","Nanum Gothic","Malgun Gothic","Segoe UI",Roboto,sans-serif;
  --radius:14px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#121615;--surface:#1a201e;--text:#e8eeeb;--muted:#a0aca7;--line:#2c3633;--accent:#4fd1c5;--accent-soft:#17302d;--accent-ink:#7fe3d9;--term:#4a3d0a;--term-line:#e0b72e;--warn:#2a2512;--on-accent:#0b1211;--badge:#c2410c}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:1.0625rem;line-height:1.85;
  word-break:keep-all;overflow-wrap:break-word;text-rendering:optimizeLegibility}
a{color:var(--accent-ink);text-underline-offset:3px}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--on-accent);padding:.6rem 1rem;z-index:100;font-weight:700}
.skip:focus{left:0}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
main:focus{outline:none}
.card:focus-within{outline:3px solid var(--accent);outline-offset:2px}
.card-title a:focus-visible{outline:none}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:720px;margin:0 auto;padding:0 20px}

/* 헤더/푸터 */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-in{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:800;font-size:1.1rem;color:var(--text);text-decoration:none;letter-spacing:-.02em}
.brand-mark{color:var(--accent);margin-right:.45em;letter-spacing:-.15em}
.site-header nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-size:.95rem}
.site-header nav a:hover{color:var(--accent)}
.site-footer{margin-top:64px;padding:32px 0 48px;border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:.9rem;line-height:1.7}
.site-footer .disclosure strong{color:var(--text)}
.foot-note{font-size:.82rem}

/* 읽기 진행 표시 */
.progress{position:fixed;left:0;top:0;width:100%;height:4px;z-index:50;background:transparent}
#progress-bar{height:100%;background:var(--accent);transform:scaleX(0);transform-origin:0 50%}

/* 홈 */
.hero{background:linear-gradient(180deg,var(--accent-soft),var(--bg));padding:48px 0 28px}
.eyebrow{margin:0 0 .5rem;color:var(--accent-ink);font-weight:700;font-size:.9rem}
.hero h1{margin:0 0 .6rem;font-size:clamp(1.7rem,5vw,2.5rem);line-height:1.3;letter-spacing:-.03em}
.hero-sub{margin:0;color:var(--muted);max-width:36em}
.section-title{font-size:1.25rem;margin:2rem 0 1rem}
.section-title small{color:var(--muted);font-weight:400;font-size:.8em}
.feed{display:grid;gap:18px;grid-template-columns:1fr}
.feed-3{grid-template-columns:1fr}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;position:relative;
  display:flex;flex-direction:column;gap:.35rem;transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:0 6px 20px rgba(0,0,0,.08);transform:translateY(-1px)}
.card-top{display:flex;gap:10px;align-items:center;font-size:.82rem;color:var(--muted)}
.badge{background:var(--badge);color:#fff;border-radius:999px;padding:1px 10px;font-weight:700;font-size:.78rem}
.card-title{margin:.1rem 0;font-size:1.2rem;line-height:1.45;letter-spacing:-.02em}
.card-big .card-title{font-size:1.5rem}
.card-title a{color:var(--text);text-decoration:none}
.card-title a::after{content:"";position:absolute;inset:0}
.hook{margin:0;color:var(--muted);font-size:.98rem;line-height:1.65}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:.4rem}
.chip{font-size:.82rem;color:var(--accent-ink);background:var(--accent-soft);border-radius:999px;padding:3px 12px;text-decoration:none;position:relative;z-index:1;line-height:1.5;min-height:24px}
a.chip:hover{background:var(--accent);color:var(--on-accent)}
.reason{margin:.2rem 0 0;font-size:.8rem;color:var(--muted)}
.read-more{margin-top:.4rem;font-weight:700;font-size:.92rem;text-decoration:none;position:relative;z-index:1;align-self:flex-start;padding:6px 0}
@media (min-width:760px){
  .feed{grid-template-columns:1fr 1fr}
  .feed .card-big{grid-column:1/-1;padding:28px 32px}
  .feed-3{grid-template-columns:repeat(3,1fr)}
}

/* 글 페이지 */
.article{padding-top:32px}
.article-head h1{font-size:clamp(1.6rem,5.2vw,2.1rem);line-height:1.4;letter-spacing:-.03em;margin:.3rem 0 .5rem}
.kicker{margin:0;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.subtitle{margin:0 0 .6rem;font-size:1.05rem;color:var(--accent-ink);font-weight:600}
.byline{margin:0 0 1.2rem;font-size:.88rem;color:var(--muted)}
.today-meta{background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:8px;padding:.4rem 1.1rem;margin:0 0 1.5rem;font-size:.95rem}
.today-meta blockquote{margin:0;padding:0;border:0}
.today-meta p{margin:.5rem 0;line-height:1.7}
.prose h2{font-size:1.35rem;line-height:1.45;margin:2.4em 0 .6em;padding-left:.7rem;border-left:5px solid var(--accent);letter-spacing:-.02em}
.prose h3{font-size:1.1rem}
.prose p{margin:1em 0}
.prose hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
.prose blockquote{margin:1.2em 0;padding:.3rem 1.1rem;background:var(--surface);border-left:4px solid var(--line);border-radius:6px;color:var(--text);font-size:.98rem}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:.35em 0}
.prose code{background:var(--accent-soft);padding:0 .35em;border-radius:4px;font-size:.92em}
.prose strong{font-weight:700}
figure{margin:1.8em 0;text-align:center}
figure img{border:1px solid var(--line);border-radius:10px;background:#fff}
.fig-link{display:block;line-height:0}
.fig-link:focus-visible{outline-offset:4px}
figcaption{font-size:.86rem;color:var(--muted);margin-top:.5rem;line-height:1.6}
.table-wrap{overflow-x:auto;margin:1.2em 0;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:.9rem;line-height:1.55;word-break:normal}
th,td{border:1px solid var(--line);padding:6px 10px;vertical-align:top;text-align:left}
th{background:var(--accent-soft)}

/* 용어 링크/카드 */
a.term{color:var(--text);text-decoration:none;background:var(--term);border-bottom:2px dotted var(--term-line);border-radius:3px;padding:0 2px;cursor:pointer}
a.term[aria-expanded="true"]{background:var(--term-line);color:#1d1600}
.inline-card,.gcard{background:var(--warn);border:1px solid var(--term-line);border-radius:10px;padding:12px 16px;font-size:.94rem;line-height:1.7;position:relative}
.inline-card{margin:.8rem 0;animation:pop .18s ease-out}
.inline-card h3,.gcard h3{margin:0 0 .2rem;font-size:1rem;color:var(--accent-ink)}
.inline-card p,.gcard p{margin:.3rem 0}
.analogy span{display:inline-block;background:var(--term-line);color:#1d1600;border-radius:4px;padding:0 6px;font-size:.78rem;font-weight:700;margin-right:4px}
.inline-card-close{position:absolute;top:8px;right:8px;border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:6px;font:inherit;font-size:.82rem;padding:2px 10px;min-height:28px;cursor:pointer}
@keyframes pop{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.glossary{margin-top:2.5rem}
.glossary h2{font-size:1.2rem;margin:0 0 .3rem}
.gcards{display:grid;gap:10px;margin-top:.8rem}
.muted{color:var(--muted);font-size:.9rem;margin:.2rem 0}
.term-sample{background:var(--term);border-bottom:2px dotted var(--term-line);padding:0 2px}

/* 하단 박스들 */
.disclosure{font-size:.92rem}
.inline-disclosure{margin:2.5rem 0 0;padding:.8rem 1rem;background:var(--accent-soft);border-radius:10px;line-height:1.7}
.ad-slot{margin:2rem 0;border:2px dashed var(--line);border-radius:10px;padding:14px;text-align:center;color:var(--muted);font-size:.9rem;min-height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:repeating-linear-gradient(45deg,transparent 0 10px,rgba(127,127,127,.05) 10px 20px)}
.ad-slot p{margin:.2rem 0;line-height:1.5}
.ad-tag{font-size:.72rem;border:1px solid var(--line);border-radius:4px;padding:0 6px;background:var(--surface)}
.paper-box{margin:2rem 0;padding:18px 22px;background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:var(--radius)}
.paper-box h2{margin:0 0 .6rem;font-size:1.2rem}
.paper-box dl{display:grid;grid-template-columns:5em 1fr;gap:.35rem .8rem;margin:0;font-size:.95rem;line-height:1.65}
.paper-box dt{color:var(--muted);font-weight:600}
.paper-box dd{margin:0}
.license-note{font-size:.84rem;color:var(--muted);margin:.7rem 0 0;line-height:1.65}
details.memo{margin:1.5rem 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
details.memo summary{cursor:pointer;padding:12px 18px;font-weight:700}
.memo-body{padding:0 18px 14px;font-size:.88rem;line-height:1.7;overflow-wrap:anywhere}
.memo-body p{margin:.6em 0}
.next-reads{margin-top:3rem;padding:2rem 0;background:var(--accent-soft)}
.next-reads h2{margin:0 0 1rem;font-size:1.35rem}
.page-article{padding-top:32px}
.gcard .also,.inline-card .also{font-size:.84rem;color:var(--muted)}

/* 홈 허브(주제별) */
.hub-section{margin-top:2.5rem}
.hubs{display:grid;gap:14px;grid-template-columns:1fr;margin-top:.8rem}
.hub{display:flex;flex-direction:column;gap:.3rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;text-decoration:none;color:var(--text)}
.hub:hover{box-shadow:0 6px 20px rgba(0,0,0,.08)}
.hub h2,.hub h3{margin:0;font-size:1.05rem;line-height:1.45;color:var(--accent-ink)}
.hub p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.65}
.hub-count{font-weight:700;font-size:.88rem;color:var(--accent-ink)}
.hub-desc{color:var(--muted);max-width:42em;margin:0 0 1.2rem}
@media (min-width:760px){.hubs{grid-template-columns:repeat(3,1fr)}}

/* FAQ·관련 키워드 */
.faq{margin-top:2.5rem;padding:4px 20px 12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.faq h2{font-size:1.25rem;margin:1rem 0 .4rem}
.faq-item h3{font-size:1.02rem;line-height:1.55;margin:1.1rem 0 .2rem;color:var(--accent-ink)}
.faq-item p{margin:.2rem 0;font-size:.97rem;line-height:1.75}
.kw{margin-top:1.5rem}
.kw-h{font-size:.9rem;color:var(--muted);margin:0 0 .4rem;font-weight:700}
.kw ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.kw li{font-size:.82rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 10px;line-height:1.6}

@media (max-width:520px){
  body{font-size:1.02rem}
  .paper-box dl{grid-template-columns:1fr;gap:0}
  .paper-box dt{margin-top:.5rem}
  .card{padding:16px 16px}
  .hero{padding:32px 0 20px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.progress,.ad-slot,.next-reads,.skip{display:none}}
.foot-links a{display:inline-block;padding:4px 2px}