:root {
  color-scheme: light;
  --paper: #f4f0e8;
  --paper-deep: #ece5d8;
  --ink: #132238;
  --ink-soft: #455365;
  --muted: #697382;
  --copper: #a86f46;
  --copper-dark: #835335;
  --line: #d7cebf;
  --white: #fffdf8;
  --focus: #d39262;
  --max: 1180px;
  --measure: 68ch;
  --nav-height: 72px;
  --shadow: 0 28px 70px rgb(61 43 27 / 10%);
  --font: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 24px); }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(rgb(19 34 56 / 5%) .6px, transparent .6px);
  background-size: 7px 7px;
  content: "";
  pointer-events: none;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: var(--nav-height);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(14px);
}
.nav-inner {
  width: min(calc(100% - 40px), var(--max));
  min-height: var(--nav-height);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 850; letter-spacing: -.035em; text-decoration: none; }
.brand img { width: 36px; height: 36px; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { padding: 9px 12px; color: var(--ink-soft); font-size: .94rem; text-decoration: none; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--copper-dark); text-decoration: underline; text-underline-offset: 5px; }
.nav-toggle { display: none; padding: 9px 13px; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--ink); cursor: pointer; }

.eyebrow { margin: 0 0 18px; color: var(--copper-dark); font-size: .76rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  background: var(--ink);
  color: var(--white);
  font-weight: 750;
  text-decoration: none;
  transition: transform .2s ease, background-color .2s ease;
}
.button:hover { background: var(--copper-dark); }
.button:active { transform: translateY(1px); }
.text-link { color: var(--ink); font-weight: 750; text-decoration-color: var(--copper); text-decoration-thickness: 2px; text-underline-offset: 5px; }
.text-link:hover { color: var(--copper-dark); }

.hero { padding: clamp(72px, 10vw, 132px) 0 clamp(88px, 12vw, 156px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(330px, .94fr); align-items: center; gap: clamp(48px, 8vw, 118px); }
.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(3.15rem, 7vw, 6.8rem);
  line-height: .98;
  letter-spacing: -.075em;
  text-wrap: balance;
}
.hero-copy { max-width: 620px; margin: 28px 0 0; color: var(--ink-soft); font-size: clamp(1.04rem, 1.7vw, 1.22rem); text-wrap: pretty; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 34px; }
.hero-visual { position: relative; }
.hero-visual img { width: 100%; filter: drop-shadow(0 30px 42px rgb(61 43 27 / 12%)); }
.hero-caption { display: flex; justify-content: space-between; gap: 20px; margin: 14px 8px 0; color: var(--muted); font-size: .75rem; letter-spacing: .08em; }

.section { padding: clamp(76px, 10vw, 132px) 0; }
.section-alt { border-block: 1px solid var(--line); background: color-mix(in srgb, var(--white) 62%, var(--paper)); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .58fr); gap: 44px; align-items: end; margin-bottom: 52px; }
.section-heading h2, .related-section h2 { max-width: 760px; margin: 0; font-size: clamp(2.25rem, 5vw, 4.8rem); line-height: 1.04; letter-spacing: -.06em; text-wrap: balance; }
.section-heading p { max-width: 520px; margin: 0; color: var(--ink-soft); }

.research-list { border-top: 1px solid var(--ink); }
.research-entry {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 52px;
  gap: 24px;
  align-items: center;
  min-height: 154px;
  padding: 26px 10px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background-color .22s ease, padding .22s ease;
}
.research-entry:hover { padding-inline: 22px; background: var(--white); }
.entry-number { align-self: start; color: var(--copper-dark); font: 700 1rem/1.2 ui-monospace, monospace; }
.entry-copy { display: grid; grid-template-columns: minmax(180px, .42fr) minmax(0, 1fr); gap: 10px 34px; align-items: baseline; }
.entry-copy small { grid-column: 1; color: var(--muted); font-size: .72rem; font-weight: 750; letter-spacing: .12em; }
.entry-copy strong { grid-column: 1; font-size: clamp(1.28rem, 2.6vw, 2rem); line-height: 1.25; letter-spacing: -.035em; }
.entry-copy > span { grid-column: 2; grid-row: 1 / span 2; max-width: 580px; color: var(--ink-soft); }
.entry-arrow { color: var(--copper-dark); font-size: 1.45rem; text-align: right; }

.principles-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(44px, 9vw, 128px); }
.principles-grid h2 { margin: 0; font-size: clamp(2.15rem, 4.8vw, 4.4rem); line-height: 1.05; letter-spacing: -.055em; }
.principle-list { border-top: 1px solid var(--ink); }
.principle { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 25px 0; border-bottom: 1px solid var(--line); }
.principle span { color: var(--copper-dark); font: 700 .9rem/1.5 ui-monospace, monospace; }
.principle h3 { margin: 0 0 8px; font-size: 1.2rem; }
.principle p { max-width: var(--measure); margin: 0; color: var(--ink-soft); }

.article-hero { padding: clamp(64px, 9vw, 118px) 0 70px; border-bottom: 1px solid var(--line); }
.article-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 210px; gap: 54px; align-items: end; }
.back-link { display: inline-block; margin-bottom: 52px; color: var(--muted); text-decoration: none; }
.back-link:hover { color: var(--copper-dark); }
.article-hero h1 { max-width: 920px; margin: 0; font-size: clamp(2.8rem, 6.4vw, 6rem); line-height: 1.01; letter-spacing: -.065em; text-wrap: balance; }
.article-deck { max-width: 760px; margin: 26px 0 0; color: var(--ink-soft); font-size: clamp(1.05rem, 1.8vw, 1.22rem); }
.issue-stamp { min-height: 210px; display: flex; flex-direction: column; justify-content: space-between; padding: 22px; border: 1px solid var(--ink); background: var(--paper-deep); }
.issue-stamp span, .issue-stamp small { color: var(--muted); font-size: .7rem; letter-spacing: .11em; }
.issue-stamp strong { color: var(--copper-dark); font: 500 5.4rem/1 ui-monospace, monospace; }
.article-section { padding-top: 82px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: clamp(56px, 9vw, 120px); align-items: start; }
.article-body { max-width: 780px; }
.article-body section + section { margin-top: 66px; }
.article-body h2 { margin: 0 0 18px; font-size: clamp(1.65rem, 3vw, 2.45rem); line-height: 1.22; letter-spacing: -.04em; }
.article-body p { max-width: var(--measure); margin: 0 0 18px; color: var(--ink-soft); }
.signal-list { display: grid; gap: 12px; padding: 0; list-style: none; }
.signal-list li { position: relative; padding: 16px 18px 16px 46px; border-top: 1px solid var(--line); color: var(--ink-soft); }
.signal-list li::before { position: absolute; left: 12px; color: var(--copper-dark); content: "—"; }
.article-note { margin-top: 70px; padding: 24px 26px; border-left: 4px solid var(--copper); background: var(--paper-deep); }
.article-note strong { display: block; margin-bottom: 8px; }
.article-note p { margin: 0; }
.article-aside { position: sticky; top: calc(var(--nav-height) + 24px); padding: 24px 0; border-block: 1px solid var(--ink); }
.aside-label { color: var(--copper-dark); font-size: .7rem; font-weight: 800; letter-spacing: .13em; }
.article-aside strong { display: block; margin-top: 12px; }
.article-aside ol { padding-left: 22px; color: var(--ink-soft); }
.article-aside a { color: var(--copper-dark); font-weight: 750; }
.related-section { border-top: 1px solid var(--line); background: var(--paper-deep); }
.related-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.related-links a { display: flex; min-height: 180px; flex-direction: column; padding: 24px; border: 1px solid var(--line); background: var(--paper); text-decoration: none; transition: transform .2s ease, border-color .2s ease; }
.related-links a:hover { border-color: var(--copper); transform: translateY(-3px); }
.related-links small { color: var(--copper-dark); letter-spacing: .11em; }
.related-links strong { margin-top: 12px; font-size: 1.35rem; }
.related-links span { margin-top: auto; color: var(--muted); }

.policy-wrap { width: min(calc(100% - 40px), 820px); margin-inline: auto; padding: clamp(68px, 10vw, 120px) 0; }
.policy-wrap .eyebrow { margin-bottom: 16px; }
.policy-wrap h1 { margin: 0 0 34px; font-size: clamp(2.75rem, 6vw, 5.5rem); line-height: 1; letter-spacing: -.06em; }
.policy-wrap h2 { margin: 54px 0 16px; font-size: clamp(1.45rem, 3vw, 2rem); letter-spacing: -.035em; }
.policy-wrap p, .policy-wrap li { color: var(--ink-soft); }
.policy-wrap ul { padding-left: 22px; }
.fact-block { margin: 30px 0; padding: 22px; border: 1px solid var(--line); background: var(--paper-deep); color: var(--ink-soft); }
.fact-block strong { display: block; color: var(--ink); }
.placeholder-notice { margin: 28px 0; padding: 18px 20px; border-left: 4px solid var(--copper); background: var(--white); color: var(--ink-soft); }

.site-footer { padding: 34px 0; border-top: 1px solid var(--line); background: var(--paper-deep); }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-row p { margin: 0; color: var(--muted); font-size: .86rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; }
.footer-links a { color: var(--ink-soft); font-size: .86rem; }
.back-top { position: fixed; right: 18px; bottom: 18px; z-index: 30; width: 44px; height: 44px; border: 1px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink); cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s ease, transform .2s ease; }
.back-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links { position: fixed; inset: var(--nav-height) 0 auto; display: none; padding: 16px 20px 22px; border-bottom: 1px solid var(--line); background: var(--paper); flex-direction: column; align-items: stretch; }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 12px 0; }
  .hero-grid, .section-heading, .principles-grid, .article-hero-grid, .article-layout { grid-template-columns: 1fr; }
  .hero { padding-top: 60px; }
  .hero-visual { max-width: 620px; }
  .section-heading { align-items: start; }
  .issue-stamp { width: min(100%, 260px); min-height: 170px; }
  .article-aside { position: static; }
}

@media (max-width: 620px) {
  .container, .nav-inner { width: min(calc(100% - 28px), var(--max)); }
  .brand span { font-size: .9rem; }
  .hero h1 { font-size: clamp(2.9rem, 15vw, 4.4rem); }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .research-entry { grid-template-columns: 44px minmax(0, 1fr) 26px; gap: 10px; min-height: 174px; padding-inline: 0; }
  .research-entry:hover { padding-inline: 8px; }
  .entry-copy { grid-template-columns: 1fr; }
  .entry-copy small, .entry-copy strong, .entry-copy > span { grid-column: 1; grid-row: auto; }
  .entry-copy > span { font-size: .9rem; }
  .related-links { grid-template-columns: 1fr; }
  .footer-row { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}