:root{
  --navy:#173b67;
  --ink:#303840;
  --muted:#707b84;
  --line:#e2e5e7;
  --soft:#f7f8f9;
  --serif: Georgia, "Noto Serif KR", "Times New Roman", serif;
  --sans:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR",
          "Malgun Gothic",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:var(--sans);font-size:15px;line-height:1.7}
a{text-decoration:none;color:inherit}
.container{width:min(1120px,calc(100% - 64px));margin:0 auto}
.topline{height:4px;background:var(--navy)}

header{
  height:88px;background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:100
}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;color:var(--navy)}
.brand-name{font-family:var(--serif);font-size:29px;line-height:1;white-space:nowrap}
.brand-divider{height:35px;width:1px;background:#cdd3d8;margin:0 18px}
.brand-detail{line-height:1.35}
.brand-detail .main{font-family:var(--serif);font-size:16px;font-weight:600}
.brand-detail .sub{font-size:12px;color:#737e86;margin-top:3px}

nav{display:flex;align-items:center;gap:30px}
nav a{font-size:14px;color:#404950;padding:31px 0 27px;border-bottom:2px solid transparent;white-space:nowrap}
nav a:hover,nav a.active{color:var(--navy);border-color:var(--navy)}

.navToggle{display:none;background:none;border:0;cursor:pointer;padding:8px;margin-left:12px}
.navToggle span{display:block;width:22px;height:2px;background:var(--navy);margin:5px 0;transition:transform .2s,opacity .2s}
.navToggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.navToggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.navToggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.hero-image{width:100%;height:445px;overflow:hidden;background:#e9eef2}
.hero-image img{width:100%;height:100%;object-fit:cover;object-position:center 52%;display:block}

.intro{padding:58px 0 54px;border-bottom:1px solid var(--line)}
.intro h1{
  font-family:var(--serif);font-size:31px;line-height:1.4;font-weight:400;
  color:var(--navy);margin:0 0 15px
}
.rule{width:38px;height:2px;background:var(--navy);margin:0 0 19px}
.intro p{max-width:800px;font-size:14px;color:#606b73;margin:0;line-height:1.9}

section{padding:58px 0;border-bottom:1px solid var(--line)}
.section-head{text-align:left;margin-bottom:37px}
.section-head h2{font-family:var(--serif);font-size:27px;font-weight:400;color:var(--navy);margin:0 0 9px}
.section-head .small-rule{width:35px;height:2px;background:var(--navy);margin:0 0 13px}
.section-head p{font-size:13px;color:var(--muted);margin:0}

.research-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.research{
  padding:7px 27px 5px 0;margin-right:25px;border-right:1px solid var(--line);
}
.research:last-child{border-right:0;margin-right:0}
.research .num{font-family:Georgia,serif;color:var(--navy);font-size:13px}
.research h3{font-size:17px;font-weight:600;color:#273f58;margin:10px 0 12px}
.research ul{list-style:none;padding:0;margin:0}
.research li{font-size:13px;color:#68737b;margin:4px 0}
.research li:before{content:"·";color:#8a969e;margin-right:7px}

.featured{background:var(--soft)}
.featured-grid{display:grid;grid-template-columns:1fr 1fr;gap:65px}
.list-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:12px}
.list-head h2{font-family:var(--serif);font-weight:400;font-size:24px;color:var(--navy);margin:0}
.more{font-size:12px;color:#68737b}
.news,.projects{border-top:1px solid var(--line)}
.news-row{
  display:grid;grid-template-columns:82px 1fr;gap:17px;padding:13px 0;border-bottom:1px solid var(--line)
}
.news-row .date{font-family:Georgia,serif;color:var(--navy);font-size:12px}
.news-row .text{font-size:13.5px;color:#414a51}
.project-row{
  display:grid;grid-template-columns:60px 1fr;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);align-items:center
}
.project-thumb{width:60px;height:43px;background:#e8ecef;overflow:hidden}
.project-thumb span{display:block;width:100%;height:100%;background:linear-gradient(135deg,#d7dee3,#f1f3f4)}
.project-title{font-size:12.5px;color:#414a51}
.project-year{font-size:11px;color:#7b858c;margin-top:2px}

.pub-list{border-top:1px solid var(--line)}
.pub-row{display:grid;grid-template-columns:34px 1fr;gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}
.pub-row .num{font-family:Georgia,serif;color:var(--navy);font-size:13px;padding-top:2px}
.pub-row .pub-title{font-size:13.5px;color:#273f58;font-weight:600;line-height:1.6}
.pub-row .pub-meta{font-size:12px;color:#68737b;margin-top:5px}
.pub-row .pub-meta strong{color:var(--navy);font-weight:600}
.pub-list.muted .pub-title{color:#4c5760}
.pub-note{font-size:12.5px;color:#8a969e;margin-top:10px}

.proj-list{border-top:1px solid var(--line);max-width:760px}
.proj-row{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.proj-row .yr{font-family:Georgia,serif;color:var(--navy);font-size:13px;padding-top:2px;white-space:nowrap}
.proj-row .proj-title{font-size:13.5px;color:#273f58;font-weight:600;line-height:1.6}
.proj-row .proj-meta{font-size:12px;color:#68737b;margin-top:5px}

.people{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}
.person{display:grid;grid-template-columns:135px 1fr;gap:25px}
.person-photo{width:135px;height:165px;background:#eef1f3;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:#879198;font-size:11px;text-align:center;overflow:hidden}
.person-photo img{width:100%;height:100%;object-fit:cover;display:block}
.person h3{font-family:var(--serif);font-size:24px;font-weight:400;color:var(--navy);margin:0 0 4px}
.person .position{font-size:12px;color:var(--muted);margin-bottom:18px}
.person p{font-size:12.5px;margin:5px 0}
.member-list{border-top:1px solid var(--line)}
.member{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);font-size:12.5px}
.member span{color:var(--muted)}

.life{background:#fafafa}
.life-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.life-item{padding:5px 24px 5px 0;margin-right:24px;border-right:1px solid var(--line)}
.life-item:last-child{border:0;margin-right:0}
.life-item h3{font-family:var(--serif);font-weight:400;font-size:18px;color:var(--navy);margin:0 0 6px}
.life-item p{font-size:12px;color:var(--muted);margin:0}

.join{background:var(--navy);color:white;border-bottom:0}
.join-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:80px}
.join .eyebrow{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#b9c7d3}
.join h2{font-family:var(--serif);font-size:22px;line-height:1.4;font-weight:400;margin:8px 0 13px}
.join p{font-size:13px;color:#c7d0d8;margin:0;max-width:520px}
.join-info{border-left:1px solid rgba(255,255,255,.35);padding-left:28px}
.join-info div{font-size:12.5px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.join-info .email{margin-top:12px;color:#fff}
.join-info a{color:#fff}

footer{padding:27px 0;color:#7c878e;font-size:11px}
.footer{display:flex;justify-content:space-between;gap:25px}

@media(max-width:900px){
  .container{width:min(100% - 42px,1120px)}
  nav{gap:15px}
  .research-grid{grid-template-columns:1fr 1fr}
  .research:nth-child(2){border-right:0;margin-right:0}
  .research:nth-child(n+3){border-top:1px solid var(--line);padding-top:23px;margin-top:20px}
  .featured-grid,.people,.join-grid{grid-template-columns:1fr;gap:45px}
  .life-grid{grid-template-columns:1fr 1fr}
  .life-item:nth-child(2){border-right:0;margin-right:0}
}
@media(max-width:680px){
  header{height:auto}
  .header-inner{padding:16px 0;align-items:flex-start}
  .brand-divider,.brand-detail{display:none}
  .brand-name{font-size:25px}
  .navToggle{display:block}
  nav{
    display:none;position:fixed;top:0;left:0;right:0;bottom:0;
    background:#fff;flex-direction:column;align-items:stretch;gap:0;
    padding:90px 24px 24px;z-index:99;overflow-y:auto
  }
  nav.open{display:flex}
  nav a{padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}
  .hero-image{height:300px}
  .intro{padding:42px 0}
  .intro h1{font-size:27px}
  .research-grid,.life-grid{grid-template-columns:1fr}
  .research,.life-item{border-right:0!important;margin-right:0;padding:20px 0;border-top:1px solid var(--line)}
  .research:first-child,.life-item:first-child{border-top:0}
  .person{grid-template-columns:105px 1fr}
  .person-photo{width:105px;height:135px}
  .footer{display:block}
}
/* =========================================================
   JOIN PAGE
========================================================= */

.join-page-hero{
  padding:78px 0 72px;
  background:#fff;
}

.join-page-eyebrow{
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--navy);
  margin-bottom:13px;
}

.join-page-hero h1{
  font-family:var(--serif);
  font-size:34px;
  line-height:1.45;
  font-weight:400;
  color:var(--navy);
  margin:0;
}

.join-page-rule{
  width:40px;
  height:2px;
  background:var(--navy);
  margin:22px 0 20px;
}

.join-page-hero p{
  max-width:820px;
  margin:0;
  font-size:14px;
  line-height:1.95;
  color:#606b73;
}


/* ---------------------------------------------------------
   COMMON
--------------------------------------------------------- */

.join-page-section{
  background:#fff;
}


/* ---------------------------------------------------------
   RESEARCH OPPORTUNITIES
--------------------------------------------------------- */

.join-research-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}

.join-research-item{
  padding:5px 28px 5px 0;
  margin-right:28px;
  border-right:1px solid var(--line);
}

.join-research-item:last-child{
  border-right:0;
  margin-right:0;
}

.join-research-item .num{
  font-family:Georgia,serif;
  font-size:13px;
  color:var(--navy);
}

.join-research-item h3{
  margin:10px 0 12px;
  font-size:16px;
  line-height:1.45;
  font-weight:600;
  color:#273f58;
}

.join-research-item p{
  margin:0;
  font-size:12px;
  line-height:1.8;
  color:#68737b;
}


/* ---------------------------------------------------------
   WHAT YOU WILL LEARN
--------------------------------------------------------- */

.join-learning{
  background:var(--soft);
}

.join-learning-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  column-gap:45px;
  row-gap:28px;
}

.join-learning-item{
  border-top:1px solid #d8dde1;
  padding-top:17px;
}

.join-learning-item h3{
  margin:0 0 7px;
  font-family:var(--serif);
  font-size:17px;
  font-weight:400;
  color:var(--navy);
}

.join-learning-item p{
  margin:0;
  font-size:12px;
  line-height:1.8;
  color:#68737b;
}


/* ---------------------------------------------------------
   STUDENTS / POSITIONS
--------------------------------------------------------- */

.join-candidate-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:85px;
}

.join-check-list{
  list-style:none;
  margin:0;
  padding:0;
  border-top:1px solid var(--line);
}

.join-check-list li{
  position:relative;
  padding:11px 0 11px 20px;
  border-bottom:1px solid var(--line);
  font-size:12.5px;
  color:#4f5961;
}

.join-check-list li:before{
  content:"—";
  position:absolute;
  left:0;
  color:var(--navy);
}

.join-note{
  margin:18px 0 0;
  padding-left:15px;
  border-left:2px solid #bcc8d2;
  font-size:11.5px;
  line-height:1.8;
  color:#78838b;
}

.join-position{
  padding:17px 0 20px;
  border-top:1px solid var(--line);
}

.join-position:last-child{
  border-bottom:1px solid var(--line);
}

.join-position-label{
  font-family:Georgia,serif;
  font-size:11px;
  color:var(--navy);
  letter-spacing:.04em;
}

.join-position h3{
  margin:4px 0 2px;
  font-size:15px;
  color:#334b61;
}

.join-position p{
  margin:0;
  font-size:12px;
  color:var(--muted);
}


/* ---------------------------------------------------------
   HOW TO APPLY
--------------------------------------------------------- */

.join-page-apply{
  background:var(--navy);
  color:#fff;
  border-bottom:0;
  padding:65px 0;
}

.join-page-apply-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:85px;
  align-items:start;
}

.join-page-eyebrow.light{
  color:#b9c7d3;
}

.join-page-apply h2{
  margin:8px 0 15px;
  font-family:var(--serif);
  font-size:23px;
  line-height:1.5;
  font-weight:400;
  color:#fff;
}

.join-page-apply > .container > div:first-child > p{
  max-width:520px;
  margin:0;
  font-size:12.5px;
  line-height:1.9;
  color:#c7d0d8;
}

.join-apply-info{
  border-left:1px solid rgba(255,255,255,.32);
  padding-left:30px;
}

.join-apply-row{
  display:grid;
  grid-template-columns:28px 1fr;
  gap:12px;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}

.join-apply-row > span{
  font-family:Georgia,serif;
  font-size:11px;
  color:#aebdca;
}

.join-apply-row strong{
  display:block;
  font-size:12.5px;
  font-weight:600;
  color:#fff;
}

.join-apply-row p{
  margin:2px 0 0;
  font-size:11.5px;
  line-height:1.6;
  color:#bbc7d1;
}

.join-email-button{
  display:inline-block;
  margin-top:25px;
  padding:10px 17px;
  border:1px solid rgba(255,255,255,.6);
  font-size:12px;
  color:#fff;
  transition:background .2s,color .2s;
}

.join-email-button:hover{
  background:#fff;
  color:var(--navy);
}


/* =========================================================
   JOIN PAGE RESPONSIVE
========================================================= */

@media(max-width:900px){

  .join-research-grid{
    grid-template-columns:1fr 1fr;
  }

  .join-research-item{
    padding:20px 25px 20px 0;
  }

  .join-research-item:nth-child(2){
    border-right:0;
    margin-right:0;
  }

  .join-research-item:nth-child(n+3){
    border-top:1px solid var(--line);
  }

  .join-learning-grid{
    grid-template-columns:1fr 1fr;
  }

  .join-candidate-grid,
  .join-page-apply-grid{
    grid-template-columns:1fr;
    gap:50px;
  }

}


@media(max-width:680px){

  .join-page-hero{
    padding:52px 0 48px;
  }

  .join-page-hero h1{
    font-size:27px;
  }

  .join-page-hero h1 br{
    display:none;
  }

  .join-research-grid,
  .join-learning-grid{
    grid-template-columns:1fr;
  }

  .join-research-item{
    margin:0;
    padding:20px 0;
    border-right:0;
    border-top:1px solid var(--line);
  }

  .join-research-item:first-child{
    border-top:0;
    padding-top:0;
  }

  .join-learning-grid{
    row-gap:22px;
  }

  .join-candidate-grid{
    gap:55px;
  }

  .join-page-apply{
    padding:52px 0;
  }

  .join-page-apply-grid{
    gap:38px;
  }

  .join-apply-info{
    border-left:0;
    border-top:1px solid rgba(255,255,255,.32);
    padding-left:0;
    padding-top:18px;
  }

}