:root{
  --bg:#F4F6F8;
  --surface:#FFFFFF;
  --surface-2:#E9EDF1;
  --ink:#152131;
  --ink-2:#4A5868;
  --ink-3:#7B8794;
  --line:#D3DAE2;
  --line-2:#E4E9EE;
  --copper:#B5602A;
  --copper-soft:#F3E3D6;
  --steel:#2E5A86;
  --steel-soft:#DDE7F1;
  --trace3:#2E7D6B;
  --grid:rgba(21,33,49,.06);
  --shadow:0 1px 2px rgba(21,33,49,.06),0 8px 24px -12px rgba(21,33,49,.18);
  --display:"Sora","Noto Sans KR",system-ui,sans-serif;
  --body:"IBM Plex Sans","Noto Sans KR",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0E141C; --surface:#151D27; --surface-2:#1C2733;
    --ink:#E7ECF2; --ink-2:#AEBAC7; --ink-3:#7E8B99;
    --line:#2B3744; --line-2:#222D39;
    --copper:#D98C55; --copper-soft:#3A2A1E;
    --steel:#7FAAD6; --steel-soft:#1D2E41; --trace3:#6FBFA8;
    --grid:rgba(231,236,242,.06);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0E141C; --surface:#151D27; --surface-2:#1C2733;
  --ink:#E7ECF2; --ink-2:#AEBAC7; --ink-3:#7E8B99;
  --line:#2B3744; --line-2:#222D39;
  --copper:#D98C55; --copper-soft:#3A2A1E;
  --steel:#7FAAD6; --steel-soft:#1D2E41; --trace3:#6FBFA8;
  --grid:rgba(231,236,242,.06);
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--copper);outline-offset:3px;border-radius:3px}
h1,h2,h3,h4{font-family:var(--display);margin:0;line-height:1.15;text-wrap:balance;font-weight:600}
p{margin:0}
.wrap{width:min(1120px,100%);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--copper)}
.mono{font-family:var(--mono)}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:env(safe-area-inset-top,0px);z-index:50;
  background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-2);
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.nav .wrap>nav{display:contents}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:18px;letter-spacing:-.01em}
.brand svg{width:28px;height:28px;flex:none}
.brand small{font-family:var(--mono);font-weight:400;font-size:11px;color:var(--ink-3);letter-spacing:.08em;display:none}
@media(min-width:640px){.brand small{display:inline}}
.menu{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.menu a{
  display:block;padding:8px 12px;border-radius:6px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);
  transition:color .15s,background .15s;
}
.menu a:hover{color:var(--ink);background:var(--surface-2)}
.menu a.active{color:var(--copper);background:var(--copper-soft)}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:6px 8px;color:var(--ink);cursor:pointer}
.menu-toggle svg{width:20px;height:20px;display:block}
@media(max-width:720px){
  .menu-toggle{display:block}
  .menu{
    position:absolute;left:0;right:0;top:64px;flex-direction:column;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);padding:8px clamp(16px,4vw,40px) 12px;
    box-shadow:var(--shadow);
  }
  .menu[hidden]{display:none}
  .menu a{padding:12px 8px;border-radius:4px}
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-2);
  background:
    linear-gradient(to right,var(--grid) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(to bottom,var(--grid) 1px,transparent 1px) 0 0/48px 48px,
    var(--surface);
}
.hero .wrap{position:relative;display:grid;gap:28px;padding-block:clamp(48px,8vw,88px) clamp(36px,6vw,64px)}
@media(min-width:900px){.hero .wrap{grid-template-columns:1.1fr .9fr;align-items:end}}
.hero h1{font-size:clamp(34px,5.2vw,58px);font-weight:700;letter-spacing:-.025em;line-height:1.05;margin-top:12px}
.hero h1 span{color:var(--copper)}
.hero .sub{margin-top:16px;font-size:clamp(15px,1.4vw,18px);color:var(--ink-2);max-width:56ch}
.hero .kr{margin-top:6px;font-family:var(--display);font-size:15px;color:var(--ink-3)}
.hero-stats{display:flex;flex-wrap:wrap;gap:24px 36px;margin-top:32px}
.stat{display:grid;gap:2px}
.stat b{font-family:var(--display);font-size:26px;font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat span{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.scope{
  position:relative;background:var(--bg);border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);overflow:hidden;aspect-ratio:16/10;max-width:100%;
}
.scope canvas{display:block;width:100%;height:100%}
.scope .tag{position:absolute;left:12px;top:10px;font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.06em}
.scope .legend{position:absolute;right:12px;bottom:10px;display:flex;gap:14px;font-family:var(--mono);font-size:11px;color:var(--ink-3)}
.legend i{display:inline-block;width:14px;height:2px;vertical-align:middle;margin-right:6px;border-radius:1px}

/* ---------- sections ---------- */
.section{padding-block:clamp(56px,7vw,88px);border-bottom:1px solid var(--line-2)}
.section:last-of-type{border-bottom:0}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:12px 32px;margin-bottom:clamp(28px,4vw,44px)}
.sec-head h2{font-size:clamp(26px,3vw,36px);letter-spacing:-.02em;margin-top:8px}
.sec-head p{color:var(--ink-2);max-width:52ch}

/* notice */
.notice{display:grid;gap:24px}
@media(min-width:880px){.notice{grid-template-columns:1.25fr .75fr}}
.notice-card{
  background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--copper);border-radius:10px;
  padding:clamp(22px,3vw,32px);display:grid;gap:14px;
}
.notice-card h3{font-size:20px}
.notice-card p{font-family:var(--body);font-size:16.5px;line-height:1.8;color:var(--ink-2);max-width:62ch;word-break:keep-all}
.contact{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:clamp(22px,3vw,28px);display:grid;gap:14px;align-content:start}
.contact dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:10px 16px;font-size:15px}
.contact dt{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);padding-top:3px}
.contact dd{margin:0;color:var(--ink)}
.contact dd a{color:var(--steel);border-bottom:1px solid transparent}
.contact dd a:hover{border-bottom-color:var(--steel)}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-self:start;
  background:var(--copper);color:#fff;font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;
  padding:11px 16px;border-radius:6px;transition:filter .15s;
}
.btn:hover{filter:brightness(1.08)}
.btn svg{width:16px;height:16px}

/* members */
.prof{display:grid;gap:28px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:clamp(22px,3vw,36px)}
@media(min-width:840px){.prof{grid-template-columns:260px 1fr}}
.prof-id{display:grid;gap:14px;align-content:start}
.portrait{
  aspect-ratio:4/5;width:100%;max-width:260px;border-radius:10px;
  background:
    radial-gradient(circle at 50% 38%,var(--steel-soft) 0 24%,transparent 25%),
    radial-gradient(ellipse at 50% 92%,var(--steel-soft) 0 40%,transparent 41%),
    var(--surface-2);
  border:1px solid var(--line);display:grid;place-items:end center;padding:12px;
}
.portrait span{font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.06em}
.prof-id h3{font-size:24px;letter-spacing:-.01em}
.prof-id .role{color:var(--ink-2);font-size:15px}
.prof-id .links{display:grid;gap:6px;font-size:14.5px}
.prof-id .links a{color:var(--steel);display:inline-flex;gap:8px;align-items:center}
.prof-id .links svg{width:15px;height:15px;color:var(--ink-3)}
.cv{display:grid;gap:28px}
@media(min-width:1000px){.cv{grid-template-columns:1fr 1fr}}
.cv h4{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--copper);font-weight:500;margin-bottom:14px}
.timeline{list-style:none;margin:0;padding:0;display:grid;gap:0;border-left:2px solid var(--line)}
.timeline li{position:relative;padding:0 0 18px 20px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-7px;top:7px;width:10px;height:10px;border-radius:50%;background:var(--surface);border:2px solid var(--copper)}
.timeline .when{font-family:var(--mono);font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.timeline .what{font-weight:500;margin-top:2px}
.timeline .where{color:var(--ink-2);font-size:14.5px}
.members-sub{margin-top:44px;display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.members-sub h3{font-size:22px}
.members-sub p{color:var(--ink-3);font-family:var(--mono);font-size:12.5px}
.grid-3{display:grid;gap:16px;margin-top:20px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.member{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start}
.avatar{
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  background:var(--steel-soft);color:var(--steel);font-family:var(--display);font-weight:600;font-size:16px;
}
.member h4{font-size:17px;font-weight:600}
.member h4 small{font-family:var(--body);font-weight:400;color:var(--ink-3);font-size:13.5px;margin-left:6px}
.member .deg{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--copper);margin-top:2px}
.member .topic{color:var(--ink-2);font-size:14.5px;margin-top:8px}
.member .topic.tbd{color:var(--ink-3);font-style:italic}
.member a{display:block;font-size:13.5px;color:var(--steel);margin-top:8px;word-break:break-all}

/* research */
.areas{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
@media(min-width:1000px){
  .areas{grid-template-columns:repeat(6,1fr)}
  .areas .area{grid-column:span 2}
  .areas .area:nth-child(n+4){grid-column:span 3}
}
.area{
  background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:24px;display:grid;gap:14px;align-content:start;
  transition:transform .2s,box-shadow .2s;
}
.area:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
@media(prefers-reduced-motion:reduce){.area,.area:hover{transform:none;transition:none}}
.area .ico{width:44px;height:44px;border-radius:8px;background:var(--copper-soft);color:var(--copper);display:grid;place-items:center}
.area .ico svg{width:24px;height:24px}
.area h3{font-size:18px}
.area p{color:var(--ink-2);font-size:15px;line-height:1.6}
.area .kw{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px}
.kw span{font-family:var(--mono);font-size:11px;padding:3px 8px;border-radius:4px;background:var(--surface-2);color:var(--ink-2)}

/* publications */
.filters{display:flex;flex-wrap:wrap;gap:8px}
.filters button{
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-2);padding:8px 14px;border-radius:999px;cursor:pointer;
  display:inline-flex;gap:8px;align-items:center;transition:background .15s,color .15s,border-color .15s;
}
.filters button b{font-weight:500;color:var(--ink-3);font-variant-numeric:tabular-nums}
.filters button:hover{border-color:var(--ink-3)}
.filters button[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.filters button[aria-pressed="true"] b{color:var(--bg);opacity:.7}
.pub-group{margin-top:36px}
.pub-group:first-of-type{margin-top:0}
.pub-group h3{font-size:14px;font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--copper);font-weight:500;padding-bottom:12px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between}
.pub-group h3 span{color:var(--ink-3)}
.pubs{list-style:none;margin:0;padding:0}
.pub{display:grid;grid-template-columns:52px 1fr;gap:12px;padding:16px 0;border-bottom:1px solid var(--line-2);font-size:15px;line-height:1.55}
.pub:last-child{border-bottom:0}
.pub .num{font-family:var(--mono);font-size:13px;color:var(--ink-3);padding-top:2px;font-variant-numeric:tabular-nums}
.pub .au{color:var(--ink-2)}
.pub .au b{color:var(--ink);font-weight:600}
.pub .ti{font-weight:500;display:block;margin:2px 0}
.pub .ve{color:var(--ink-2);font-size:14.5px}
.pub .ve i{font-style:italic}
.pub .yr{font-family:var(--mono);font-size:12px;color:var(--copper);margin-left:8px}
.pub-note{margin:-12px 0 22px;font-size:13px;color:var(--ink-3)}

/* projects */
.proj-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:720px;font-size:15px}
thead th{
  text-align:left;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-weight:500;
  padding:14px 18px;border-bottom:1px solid var(--line);background:var(--surface-2);
}
tbody td{padding:16px 18px;border-bottom:1px solid var(--line-2);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
td.t{font-weight:500;line-height:1.5}
td.s{color:var(--ink-2);white-space:nowrap}
td.p{font-family:var(--mono);font-size:13px;color:var(--ink-2);white-space:nowrap;font-variant-numeric:tabular-nums}
.pill{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.06em;padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--ink-2)}
.pill.on{background:var(--steel-soft);color:var(--steel)}

/* footer */
footer{background:var(--surface);border-top:1px solid var(--line)}
footer .wrap{display:grid;gap:24px;padding-block:40px 32px}
@media(min-width:800px){footer .wrap{grid-template-columns:minmax(0,1fr) auto;gap:24px 48px}}
footer .addr{color:var(--ink-2);font-size:14.5px;line-height:1.7}
footer .fine{display:flex;flex-wrap:wrap;gap:8px 20px;font-family:var(--mono);font-size:12px;color:var(--ink-3);grid-column:1/-1;border-top:1px solid var(--line-2);padding-top:18px}
footer .fine a{color:var(--steel)}
.flinks{display:grid;gap:8px;font-size:14.5px;align-content:start}
.flinks a{color:var(--steel);display:inline-flex;gap:8px;align-items:center}
.flinks svg{width:15px;height:15px;color:var(--ink-3)}

/* photos */
img.portrait{width:160px;max-width:160px;height:auto;aspect-ratio:7/10;object-fit:cover;padding:0;display:block;background:var(--surface-2)}
@media(min-width:840px){.prof{grid-template-columns:200px 1fr}}
.member{grid-template-columns:104px 1fr;gap:18px}
.avatar{width:104px;height:136px;border-radius:10px}
img.avatar{object-fit:cover;object-position:center top;display:block;border:1px solid var(--line-2)}
.area{overflow:hidden}
.area-img{display:block;width:calc(100% + 48px);max-width:none;margin:-24px -24px 0;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--line-2)}
#notice{position:relative;background:linear-gradient(rgba(12,18,26,.78),rgba(12,18,26,.78)),url("img/campus.jpg") center/cover no-repeat;border-bottom:0}
#notice .notice-card,#notice .contact{box-shadow:0 12px 40px -16px rgba(0,0,0,.6)}

/* former inline styles */
.sw-steel{background:var(--steel)}
.sw-copper{background:var(--copper)}
.sw-green{background:var(--trace3)}
.brand-foot{margin-bottom:12px}
.col-no{width:44px}
.td-no{color:var(--ink-3)}