:root {
  color-scheme: light;
  --paper: #f4f0e8;
  --paper-deep: #ece6db;
  --ink: #151515;
  --muted: #6b665e;
  --line: #c9c1b5;
  --line-dark: #7b756d;
  --blue: #1659d8;
  --blue-soft: #dbe6fb;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif;
  --serif: "Noto Serif KR", "Iowan Old Style", "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #e8e2d7; color: var(--ink); font-family: var(--sans); line-height: 1.68; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue); }
.skip-link { position: fixed; left: 1rem; top: -4rem; z-index: 20; background: var(--ink); color: white; padding: .6rem 1rem; }
.skip-link:focus { top: 1rem; }
.site-shell { width: min(1528px, calc(100% - 40px)); margin: 0 auto; min-height: 100vh; background: var(--paper); border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
.masthead { height: 102px; display: grid; grid-template-columns: 230px 1fr 100px; align-items: center; border-bottom: 1px solid var(--line); padding: 0 32px; }
.wordmark { display: flex; align-items: center; gap: 11px; width: max-content; line-height: .86; }
.wordmark .mark { display: grid; place-items: center; width: 44px; height: 44px; background: var(--ink); color: white; font: 700 14px var(--mono); letter-spacing: -.08em; }
.wordmark > span:last-child { display: grid; font: 800 15px/0.9 var(--sans); letter-spacing: -.05em; }
.wordmark b:nth-child(2) { color: var(--blue); }
.masthead p { margin: 0; text-align: center; color: var(--muted); font: 13px var(--mono); letter-spacing: .01em; }
.language-link { justify-self: end; border: 1px solid var(--line); padding: 8px 14px; font: 12px var(--mono); text-transform: uppercase; }
.archive-layout { display: grid; grid-template-columns: 248px minmax(0, 1fr); }
.archive-rail { border-right: 1px solid var(--line); padding: 48px 30px; }
.archive-rail nav { position: sticky; top: 30px; display: grid; gap: 8px; }
.archive-rail a { padding: 8px 6px; color: #403d39; font-size: 14px; }
.archive-rail a::before { content: "□"; margin-right: 12px; font-family: var(--mono); color: var(--muted); }
.archive-rail a:hover::before { content: "■"; color: var(--blue); }
main { min-width: 0; }
.hero { min-height: 610px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(330px, .7fr); border-bottom: 1px solid var(--line); }
.hero-copy { padding: 82px clamp(42px, 7vw, 100px) 68px; }
.eyebrow { display: block; color: var(--blue); font: 11px var(--mono); letter-spacing: .09em; text-transform: uppercase; margin-bottom: 28px; }
.eyebrow::before { content: "■"; margin-right: 8px; }
.hero h1 { max-width: 760px; margin: 0; font: 600 clamp(48px, 5.4vw, 82px)/1.08 var(--serif); letter-spacing: -.055em; text-wrap: balance; }
.hero-copy > p { max-width: 680px; margin: 30px 0 26px; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.primary-action { display: inline-flex; align-items: center; justify-content: center; background: var(--blue); color: white; min-height: 46px; padding: 0 20px; font-weight: 700; }
.primary-action:hover { background: #0e46b1; color: white; }
.hero-actions > span { color: var(--muted); font: 12px var(--mono); }
.check-board { background: var(--paper-deep); border-left: 1px solid var(--line); padding: 68px 42px; }
.check-board > div { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 18px; border-bottom: 2px solid var(--ink); font: 11px var(--mono); }
.check-board > div span { color: var(--blue); }
.check-board ol { list-style: none; margin: 0; padding: 0; }
.check-board li { display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: center; min-height: 84px; border-bottom: 1px solid var(--line); font-size: 15px; }
.check-board li span { color: var(--blue); font: 12px var(--mono); }
.content-section { padding: 54px clamp(34px, 5vw, 68px); border-bottom: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 2px solid var(--ink); color: var(--blue); font: 11px var(--mono); letter-spacing: .05em; }
.section-heading b { color: var(--ink); font-weight: 500; }
.guide-row { display: grid; grid-template-columns: 130px minmax(0, 1fr) 110px; gap: 24px; padding: 27px 0; border-bottom: 1px solid var(--line); }
.guide-index { display: grid; align-content: start; gap: 12px; }
.guide-index span { color: var(--blue); font: 11px var(--mono); }
.guide-index b { font-size: 12px; font-weight: 500; }
.guide-meta { display: flex; gap: 14px; color: var(--blue); font: 11px var(--mono); }
.guide-meta span + span::before { content: "·"; margin-right: 14px; color: var(--line-dark); }
.guide-summary h2 { margin: 8px 0 5px; font: 600 clamp(21px, 2vw, 29px)/1.28 var(--serif); letter-spacing: -.035em; }
.guide-summary p { margin: 0; color: var(--muted); font-size: 14px; }
.guide-side { display: grid; grid-template-columns: 1fr; justify-items: end; align-content: start; gap: 8px; color: var(--muted); font: 11px var(--mono); }
.guide-side a { display: grid; place-items: center; width: 30px; height: 30px; margin-top: 5px; border: 1px solid var(--line-dark); color: var(--ink); font-size: 16px; }
.topic-board { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); margin-top: 32px; }
.topic-board a { min-height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 14px; }
.topic-board a:hover { background: var(--blue-soft); }
.topic-note { margin: 22px 0 0; color: var(--muted); font-size: 13px; }
footer { min-height: 88px; display: flex; align-items: center; gap: 30px; padding: 20px 32px; border-top: 1px solid var(--line); color: var(--muted); font: 11px var(--mono); }
footer span:first-child { color: var(--ink); font-weight: 700; }
footer a:first-of-type { margin-left: auto; }

.article-shell { padding: 38px clamp(34px, 6vw, 92px) 82px; }
.article-topline { display: flex; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--line); color: var(--muted); font: 11px var(--mono); }
.article-header { padding: 62px 0 52px; border-bottom: 2px solid var(--ink); }
.article-kicker { display: flex; align-items: center; gap: 12px; color: var(--blue); font: 11px var(--mono); }
.article-kicker i { width: 26px; height: 1px; background: var(--line-dark); }
.article-header h1 { max-width: 900px; margin: 20px 0 18px; font: 600 clamp(45px, 5vw, 72px)/1.12 var(--serif); letter-spacing: -.05em; text-wrap: balance; }
.article-header > p { max-width: 790px; margin: 0; color: var(--muted); font-size: 17px; }
.article-facts { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 26px; font: 11px var(--mono); color: var(--muted); }
.article-facts span + span::before { content: "·"; margin-right: 20px; color: var(--blue); }
.article-reading-grid { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 58px; padding-top: 50px; }
.article-body { min-width: 0; }
.article-body section { margin-bottom: 48px; }
.article-body h2 { margin: 0 0 18px; font: 650 28px/1.36 var(--serif); letter-spacing: -.035em; }
.article-body p { margin: 0 0 17px; color: #34312d; font-size: 16px; }
.article-body ol { padding-left: 24px; margin: 24px 0; }
.article-body li { margin: 11px 0; padding-left: 6px; }
.article-body code, .prose-page code { font-family: var(--mono); font-size: .9em; background: var(--paper-deep); padding: .08em .3em; }
.article-body pre { overflow-x: auto; padding: 24px; background: #1b1e22; color: #e7ebf0; border-left: 4px solid var(--blue); font: 13px/1.65 var(--mono); }
.article-body pre code { padding: 0; background: none; color: inherit; }
.guide-figure { margin: 0 0 44px; }
.guide-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); background: #1b1e22; }
.guide-figure figcaption { margin-top: 10px; color: var(--muted); font: 12px/1.55 var(--mono); }
.source-box { display: grid; gap: 6px; padding: 22px; border: 1px solid var(--line); background: var(--paper-deep); }
.source-box span { color: var(--blue); font: 10px var(--mono); text-transform: uppercase; }
.source-box a { font-weight: 700; }
.checklist-card { align-self: start; position: sticky; top: 30px; border-top: 3px solid var(--blue); background: var(--paper-deep); padding: 22px; }
.checklist-card > span { color: var(--blue); font: 10px var(--mono); text-transform: uppercase; }
.checklist-card ul { list-style: none; padding: 0; margin: 16px 0 0; }
.checklist-card li { padding: 10px 0; border-top: 1px solid var(--line); font-size: 13px; }
.next-guide { display: grid; grid-template-columns: 120px 1fr 30px; gap: 20px; align-items: center; margin-top: 58px; padding: 28px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); }
.next-guide span { color: var(--blue); font: 10px var(--mono); text-transform: uppercase; }
.next-guide b { font: 600 23px var(--serif); }

.prose-page { max-width: 920px; padding: 52px clamp(34px, 7vw, 96px) 90px; }
.back-link { display: block; margin-bottom: 60px; color: var(--muted); font: 11px var(--mono); }
.prose-page h1 { margin: 0 0 22px; font: 600 clamp(48px, 6vw, 76px)/1.08 var(--serif); letter-spacing: -.055em; }
.prose-page .lead { max-width: 740px; color: var(--muted); font-size: 18px; }
.prose-page dl { display: grid; grid-template-columns: repeat(2, 1fr); margin: 48px 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.prose-page dl div { padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.prose-page dt { color: var(--blue); font: 10px var(--mono); }
.prose-page dd { margin: 7px 0 0; font-weight: 650; }
.prose-page h2 { margin: 48px 0 16px; font: 650 28px var(--serif); }
.prose-page li, .prose-page section p { color: #34312d; }
.notice { margin: 44px 0 26px; padding: 22px; background: var(--paper-deep); border-left: 3px solid var(--blue); }
.notice span { display: block; color: var(--blue); font: 10px var(--mono); text-transform: uppercase; }
.notice p { margin: 0 0 8px; }
.privacy-page > time { display: block; margin: 32px 0 42px; color: var(--blue); font: 11px var(--mono); }
.privacy-page section { border-top: 1px solid var(--line); }
.not-found { min-height: 600px; padding: 90px; }
.not-found h1 { max-width: 700px; font: 600 64px/1.12 var(--serif); letter-spacing: -.05em; }
.not-found p { color: var(--muted); margin-bottom: 28px; }

@media (max-width: 980px) {
  .site-shell { width: 100%; border: 0; }
  .masthead { grid-template-columns: 160px 1fr 70px; padding: 0 20px; }
  .masthead p { font-size: 10px; }
  .archive-layout { grid-template-columns: 1fr; }
  .archive-rail { border-right: 0; border-bottom: 1px solid var(--line); padding: 0 20px; overflow-x: auto; }
  .archive-rail nav { position: static; display: flex; min-width: max-content; }
  .archive-rail a { padding: 14px 16px 14px 0; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 60px 34px; }
  .check-board { border-left: 0; border-top: 1px solid var(--line); padding: 36px 34px; }
  .check-board ol { display: grid; grid-template-columns: repeat(2, 1fr); }
  .check-board li:nth-child(odd) { border-right: 1px solid var(--line); }
  .article-reading-grid { grid-template-columns: 1fr; }
  .checklist-card { position: static; }
}

@media (max-width: 650px) {
  .masthead { height: 82px; grid-template-columns: 1fr auto; }
  .masthead p { display: none; }
  .wordmark .mark { width: 38px; height: 38px; }
  .hero { min-height: auto; }
  .hero h1 { font-size: 46px; }
  .hero-copy { padding: 50px 22px; }
  .check-board { padding: 30px 22px; }
  .check-board ol { grid-template-columns: 1fr; }
  .check-board li:nth-child(odd) { border-right: 0; }
  .content-section { padding: 42px 22px; }
  .guide-row { grid-template-columns: 52px minmax(0, 1fr); gap: 14px; }
  .guide-side { grid-column: 2; grid-template-columns: repeat(3, auto); justify-content: start; justify-items: start; align-items: center; }
  .guide-side a { margin: 0; }
  .guide-meta { flex-wrap: wrap; gap: 5px; }
  .guide-meta span + span::before { display: none; }
  .topic-board { grid-template-columns: 1fr; }
  footer { align-items: flex-start; flex-direction: column; gap: 8px; }
  footer a:first-of-type { margin-left: 0; }
  .article-shell { padding: 30px 22px 60px; }
  .article-header { padding: 48px 0 40px; }
  .article-header h1 { font-size: 43px; }
  .article-facts { display: grid; gap: 6px; }
  .article-facts span + span::before { display: none; }
  .article-reading-grid { gap: 30px; }
  .next-guide { grid-template-columns: 1fr 28px; }
  .next-guide span { grid-column: 1 / -1; }
  .prose-page { padding: 42px 22px 70px; }
  .prose-page h1 { font-size: 48px; }
  .prose-page dl { grid-template-columns: 1fr; }
  .not-found { padding: 60px 22px; }
  .not-found h1 { font-size: 48px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }