:root{
  --paper:#F5F1E8;       /* base */
  --paper-hi:#FBF8F1;    /* raised cards */
  --ink:#22304A;         /* body text (navy ink) */
  --navy:#12233F;        /* headings, strong */
  --faded:#75758B;       /* secondary text */
  --gold:#9A7B1C;        /* gold for text (readable on paper) */
  --gold-hi:#C9A227;     /* gold for lines, dots */
  --line:rgba(18,35,63,.14);
  --gline:rgba(201,162,39,.45);
  --serif:'Noto Serif KR', serif;
  --sans:'Pretendard Variable', Pretendard, sans-serif;
  --mono:'IBM Plex Mono', monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  display:flex;flex-direction:column;min-height:100svh;
}
main{flex:1}
/* paper grain */
body::after{
  content:"";position:fixed;inset:0;z-index:99;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  opacity:.06;mix-blend-mode:multiply;
}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--navy);outline-offset:3px;border-radius:2px}
::selection{background:var(--navy);color:var(--paper)}

.wrap{max-width:1060px;margin:0 auto;padding:0 24px}

/* ── nav ─────────────────────────── */
header{
  position:fixed;top:0;left:0;right:0;z-index:10;
  transition:background .35s ease, border-color .35s ease;
  border-bottom:1px solid transparent;
}
header.solid{background:rgba(245,241,232,.92);backdrop-filter:blur(8px);border-bottom-color:var(--line)}
.nav{display:flex;align-items:baseline;justify-content:space-between;gap:24px;padding:20px 24px;max-width:1060px;margin:0 auto}
.nav .mark{display:flex;align-items:center;gap:11px;white-space:nowrap}
.mk-seal{
  width:31px;height:31px;flex-shrink:0;
  border:1px solid var(--gold-hi);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:'Playfair Display',serif;font-style:italic;font-weight:600;
  font-size:.8rem;color:var(--navy);
}
.mk-name{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.26em;
  color:var(--navy);
}
.nav ul{display:flex;gap:28px;list-style:none}
.nav ul a{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:var(--faded);transition:color .2s}
.nav ul a:hover{color:var(--gold)}
.nav ul a[aria-current="page"]{color:var(--gold)}
@media(max-width:640px){.nav ul{gap:16px}.nav ul a{font-size:.62rem}.nav .mk-name{display:none}}
@media(max-width:480px){
  .nav .mark{display:none}
  .nav ul{width:100%;justify-content:space-between;gap:0}
}

/* ── home hero ────────────────────── */
.hero{
  position:relative;
  display:flex;align-items:center;
  overflow:hidden;
}
#net{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:1;padding:100px 24px 90px;max-width:1060px;margin:0 auto;width:100%}
.eyebrow{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;
  color:var(--gold);margin-bottom:26px;
}
.hero h1{
  font-family:var(--serif);font-weight:700;color:var(--navy);
  font-size:clamp(3rem, 8.5vw, 5.6rem);
  line-height:1.08;letter-spacing:.01em;
}
.hero .h1-role{
  font-size:.4em;font-weight:600;color:var(--gold);
  letter-spacing:.08em;vertical-align:.14em;
}
.hero .en{
  display:block;font-family:'Playfair Display',var(--serif);font-weight:500;
  font-size:clamp(1rem, 2.2vw, 1.35rem);
  color:var(--faded);letter-spacing:.34em;margin-top:14px;
}
.hero .thesis{
  margin-top:52px;max-width:34em;
  font-family:var(--serif);font-weight:400;
  font-size:clamp(1.15rem, 2.4vw, 1.5rem);line-height:1.85;
  color:var(--ink);
}
.hero .thesis strong{font-weight:600;color:var(--gold)}
.hero .sub{margin-top:18px;color:var(--faded);font-size:.95rem;max-width:38em}

/* home paths */
.paths{padding:70px 0 120px}
.paths-head{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;
  color:var(--gold);margin-bottom:28px;
}
.paths-list{border-top:1px solid var(--line)}
.prow{
  display:grid;grid-template-columns:96px 1fr 1.25fr;
  gap:20px 48px;padding:44px 10px;align-items:start;
  border-bottom:1px solid var(--line);
  transition:background .3s;
}
.prow:hover{background:var(--paper-hi)}
.prow>*{min-width:0}
.prow .p-no{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;color:var(--gold);padding-top:8px}
.prow h2{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1.5rem;margin-bottom:8px}
.prow .p-main p{color:var(--faded);font-size:.9rem;line-height:1.7;max-width:26em}
.prow .p-go{
  display:inline-block;margin-top:16px;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.18em;color:var(--gold);
  transition:color .2s;
}
.prow:hover .p-go{color:var(--navy)}
.peek-lines{list-style:none}
.peek-lines li{
  position:relative;padding:10px 0 10px 22px;
  font-size:.88rem;color:var(--ink);line-height:1.6;
  border-bottom:1px solid var(--line);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.peek-lines li:last-child{border-bottom:0}
.peek-lines li::before{
  content:"";position:absolute;left:3px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;
  border:1px solid var(--gold-hi);
}
.peek-lines li.now{color:var(--navy);font-weight:600}
.peek-lines li.now::before{background:var(--gold-hi)}
.peek-lines li .pk-m{font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;color:var(--faded)}
.peek-book{display:flex;gap:18px;align-items:flex-start}
.peek-book img{
  width:64px;height:auto;flex-shrink:0;
  border:1px solid var(--line);box-shadow:3px 3px 0 rgba(18,35,63,.1);
}
.peek-book .pk-t{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1.05rem;line-height:1.5}
.peek-book .pk-m{font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;color:var(--faded);margin-top:6px}
.peek-book .pk-m.gold{color:var(--gold)}
@media(max-width:820px){
  .prow{grid-template-columns:1fr;gap:14px;padding:36px 4px}
  .prow .p-no{padding-top:0}
  .prow .p-go{margin-top:8px}
}

/* ── subpage head ─────────────────── */
.page-head{padding:170px 0 64px;border-bottom:1px solid var(--line)}
.page-head .label{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;
  color:var(--gold);display:block;margin-bottom:16px;
}
.page-head h1{
  font-family:var(--serif);font-weight:700;color:var(--navy);
  font-size:clamp(2.2rem,5.5vw,3.4rem);letter-spacing:.02em;line-height:1.2;
}
.page-head .lede{margin-top:18px;color:var(--faded);font-size:1rem;max-width:38em}

.page-body{padding:80px 0 130px}

/* profile timeline */
.timeline{list-style:none;max-width:640px}
.timeline li{
  position:relative;padding:0 0 34px 34px;
  border-left:1px solid var(--gline);
}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-4.5px;top:9px;
  width:8px;height:8px;border-radius:50%;
  background:var(--paper);border:1.5px solid var(--gold-hi);
}
.timeline li.now::before{background:var(--gold-hi)}
.timeline .t-year{
  font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;
  color:var(--gold);margin-bottom:3px;
}
.timeline .t-role{font-weight:600;font-size:1.02rem;color:var(--navy)}
.timeline .t-org{color:var(--faded);font-size:.92rem;margin-top:2px}
.timeline .t-tag{
  display:inline-block;margin-left:10px;padding:1px 9px;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;
  color:var(--gold);border:1px solid var(--gline);border-radius:99px;vertical-align:2px;
}
.group-label{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.22em;
  color:var(--gold);margin:64px 0 28px;
}
.group-label:first-child{margin-top:0}

/* research */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
@media(max-width:760px){.cards{grid-template-columns:1fr}}
.card{background:var(--paper-hi);padding:38px 30px;transition:background .3s;border-top:2px solid var(--gold-hi)}
.card:hover{background:#fff}
.card .domain{font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;color:var(--gold);margin-bottom:16px}
.card h3{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1.3rem;margin-bottom:14px}
.card p{color:var(--faded);font-size:.93rem}
.foundation{
  margin-top:44px;display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 22px;
  color:var(--faded);font-size:.92rem;
}
.foundation .k{font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;color:var(--gold)}
.foundation .v{font-family:var(--serif);color:var(--navy)}
.foundation .v + .v::before{content:"·";color:var(--gold-hi);margin-right:22px;margin-left:-11px}

/* books */
.book{
  display:flex;gap:56px;align-items:flex-start;flex-wrap:wrap;
  padding:48px;border:1px solid var(--line);background:var(--paper-hi);
}
@media(max-width:640px){.book{padding:32px 24px;gap:36px}}
.book-cover-img{
  flex-shrink:0;width:200px;max-width:100%;height:auto;
  border:1px solid var(--line);
  box-shadow:6px 6px 0 rgba(18,35,63,.12);
}
.book-cover{
  flex-shrink:0;width:190px;aspect-ratio:132/205;
  background:var(--navy);border:1px solid var(--gold-hi);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:26px 20px;
  box-shadow:6px 6px 0 rgba(18,35,63,.12);
}
.book-cover .bc-label{font-family:var(--mono);font-size:.56rem;letter-spacing:.22em;color:var(--gold-hi)}
.book-cover .bc-title{
  font-family:var(--serif);font-weight:700;color:var(--paper);
  font-size:1.35rem;line-height:1.45;letter-spacing:.04em;
}
.book-cover .bc-pub{font-family:var(--mono);font-size:.56rem;letter-spacing:.18em;color:rgba(245,241,232,.6)}
.book-info{flex:1;min-width:260px}
.book-info h3{
  font-family:var(--serif);font-weight:600;color:var(--navy);
  font-size:clamp(1.4rem,3vw,1.8rem);margin-bottom:10px;
}
.book-info .b-sub{
  font-family:var(--serif);color:var(--faded);
  font-size:.95rem;margin:-4px 0 12px;
}
.book-info .b-meta{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;
  color:var(--faded);margin-bottom:26px;
}
.book-info .b-meta b{color:var(--gold);font-weight:400}
.book-info .b-desc{color:var(--ink);font-size:.95rem;max-width:36em}
.book-chapters{list-style:none;margin-top:28px;max-width:36em}
.book-chapters .bch-head{
  font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;
  color:var(--gold);margin-bottom:12px;
}
.book-chapters li{
  display:flex;gap:14px;align-items:baseline;
  padding:12px 2px;border-top:1px solid var(--line);
}
.book-chapters li:last-child{border-bottom:1px solid var(--line)}
.book-chapters .bch-no{font-family:var(--mono);font-size:.64rem;letter-spacing:.12em;color:var(--faded);flex-shrink:0}
.book-chapters .bch-title{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1rem}
.book-link{
  display:inline-block;margin-top:30px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;
  color:var(--gold);border-bottom:1px solid var(--gline);padding-bottom:3px;
  transition:color .2s,border-color .2s;
}
.book-link:hover{color:var(--navy);border-color:var(--navy)}

/* publications */
.pubs{list-style:none;max-width:780px}
.pubs li{
  display:flex;gap:24px;align-items:baseline;
  padding:20px 2px;border-bottom:1px solid var(--line);
}
.pubs li:first-child{border-top:1px solid var(--line)}
.pub-year{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  color:var(--gold);flex-shrink:0;width:46px;
}
a.pub-title{
  font-family:'Playfair Display',var(--serif);font-weight:600;color:var(--navy);
  font-size:1.05rem;line-height:1.55;transition:color .2s;
}
a.pub-title:hover{color:var(--gold)}
.pub-meta{
  font-family:var(--mono);font-size:.64rem;letter-spacing:.1em;
  color:var(--faded);margin-top:5px;
}
.pub-meta b{color:var(--gold);font-weight:400}
.ext-link{
  display:inline-block;margin-top:34px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;
  color:var(--gold);border-bottom:1px solid var(--gline);padding-bottom:3px;
  transition:color .2s,border-color .2s;
}
.ext-link:hover{color:var(--navy);border-color:var(--navy)}

/* horizontal rule */
.hline{
  border:0;height:1px;margin:90px 0 56px;
  background:linear-gradient(90deg, var(--gold-hi), rgba(201,162,39,.12));
}
.hline + .group-label{margin-top:0}

/* press quotes — pulled dialogue */
.quotes{
  list-style:none;max-width:780px;
  border-top:1px solid var(--line);
}
.quote-card{
  position:relative;display:block;
  padding:48px 0 44px 60px;
  border-bottom:1px solid var(--line);
}
.quote-card::before{
  content:"\201C";position:absolute;left:0;top:42px;
  font-family:'Playfair Display',serif;font-weight:600;
  font-size:3.2rem;line-height:1;color:var(--gold-hi);
}
.quote-card blockquote{
  font-family:var(--serif);font-size:1.12rem;line-height:2;
  color:var(--ink);max-width:32em;
}
.q-src{
  display:inline-block;margin-top:20px;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;
  color:var(--faded);transition:color .2s;
}
.q-src::before{content:"";display:inline-block;width:26px;height:1px;background:var(--gold-hi);vertical-align:4px;margin-right:12px}
.q-src:hover{color:var(--gold)}
@media(max-width:640px){
  .quote-card{padding-left:40px}
  .quote-card::before{font-size:2.4rem;top:46px}
}

/* teaching */
.courses{list-style:none;max-width:720px}
.courses li{
  display:flex;align-items:baseline;justify-content:space-between;gap:20px;
  padding:22px 4px;border-bottom:1px solid var(--line);
}
.courses li:first-child{border-top:1px solid var(--line)}
.courses .c-name{font-family:var(--serif);font-weight:600;color:var(--navy);font-size:1.15rem}
.courses .c-en{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;color:var(--faded);text-align:right;flex-shrink:0}

/* contact — the navy moment */
main.contact{display:flex;flex-direction:column}
main.contact .contact-block{flex:1}
.contact-block{
  background:var(--navy);color:var(--paper);
  border-top:2px solid var(--gold-hi);
  padding:110px 0 130px;
}
.contact-block .label{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.24em;
  color:var(--gold-hi);display:block;margin-bottom:16px;
}
.contact-block h1,.contact-block h2{
  font-family:var(--serif);font-weight:700;color:var(--paper);
  font-size:clamp(2rem,5vw,3rem);margin-bottom:56px;
}
.contact-grid{display:flex;flex-wrap:wrap;gap:40px 80px;align-items:flex-start}
.contact-grid .big-mail{
  font-family:var(--serif);font-weight:600;color:var(--paper);
  font-size:clamp(1.3rem,3.4vw,2rem);letter-spacing:.02em;
  border-bottom:1px solid var(--gold-hi);padding-bottom:4px;
  transition:color .2s;
}
.contact-grid .big-mail:hover{color:var(--gold-hi)}
.contact-grid .addr{color:rgba(245,241,232,.72);font-size:.93rem;line-height:2}
.contact-grid .addr .k{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;color:var(--gold-hi);display:block;margin-bottom:6px}

/* prev/next pager */
.pager{
  margin-top:90px;padding-top:28px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:20px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;
}
.pager a{color:var(--faded);transition:color .2s}
.pager a:hover{color:var(--gold)}

/* campus banner */
.campus{
  position:relative;min-height:600px;overflow:hidden;
  border-bottom:2px solid var(--gold-hi);
  display:flex;flex-direction:column;justify-content:space-between;
}
@media(max-width:640px){.campus{min-height:520px}}
.campus img{
  position:absolute;inset:0;
  width:100%;height:100%;object-fit:cover;object-position:center 40%;
  filter:grayscale(.45) sepia(.1) brightness(.92);
}
.campus-veil{
  position:absolute;inset:0;
  background:linear-gradient(rgba(10,20,40,.82), rgba(18,35,63,.42) 48%, rgba(10,20,40,.9));
}
.campus-thesis{
  position:relative;z-index:1;
  width:100%;max-width:1060px;margin:0 auto;
  padding:126px 24px 0;
}
.campus-thesis .thesis{
  font-family:'Playfair Display',var(--serif);font-weight:500;font-style:italic;
  font-size:clamp(1.5rem,3.2vw,2.1rem);line-height:1.4;
  letter-spacing:.02em;
  color:var(--paper);max-width:30em;
}
.campus-thesis .thesis-domains{
  margin-top:12px;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.3em;
  color:var(--gold-hi);
}
.campus-inner{
  position:relative;z-index:1;
  width:100%;max-width:1060px;margin:48px auto 0;
  padding:0 24px 52px;
}
.campus-inner .eyebrow{color:var(--gold-hi);margin-bottom:18px}
.campus-inner h1{
  font-family:var(--serif);font-weight:700;color:var(--paper);
  font-size:clamp(2.6rem,6.5vw,4.4rem);
  line-height:1.1;letter-spacing:.01em;
}
.campus-inner .h1-role{
  font-size:.4em;font-weight:600;color:var(--gold-hi);
  letter-spacing:.08em;vertical-align:.14em;
}
.campus-inner .en{
  display:block;font-family:'Playfair Display',var(--serif);font-weight:500;
  font-size:clamp(.9rem,2vw,1.2rem);
  color:rgba(245,241,232,.72);letter-spacing:.34em;margin-top:12px;
}
.campus-caption{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);
  width:92%;
  color:rgba(245,241,232,.9);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.3em;
  text-align:center;
}
@media(max-width:640px){
  .campus-caption{bottom:26px;font-size:.56rem;letter-spacing:.18em;line-height:1.9}
}
.campus-credit{
  position:absolute;right:12px;bottom:8px;
  color:rgba(245,241,232,.35);
  font-family:var(--mono);font-size:.52rem;letter-spacing:.1em;
}
.campus-credit a{color:inherit}

footer{
  background:var(--navy);
  border-top:1px solid rgba(245,241,232,.14);padding:36px 0 46px;
  color:rgba(245,241,232,.55);font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;
}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.contact-block + footer{border-top-color:rgba(245,241,232,.2)}

/* reveal */
.rv{opacity:0;transform:translateY(22px);transition:opacity .8s ease,transform .8s ease}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
}