:root {
  --ink: #0b1925;
  --navy: #0b2942;
  --blue: #154d70;
  --teal: #2a776f;
  --sand: #d8b979;
  --paper: #f6f3ed;
  --paper-2: #ebe7df;
  --white: #fff;
  --muted: #65727c;
  --line: rgba(11, 25, 37, .14);
  --line-light: rgba(255,255,255,.18);
  --shadow: 0 24px 70px rgba(10, 31, 48, .11);
  --shell: min(1240px, calc(100% - 48px));
  --header-h: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Pretendard Variable", "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.68;
  letter-spacing: -.02em;
  text-rendering: optimizeLegibility;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
svg { width: 100%; height: 100%; }
.shell { width: var(--shell); margin-inline: auto; }

.skip-link {
  position: fixed; z-index: 9999; left: 16px; top: 14px;
  transform: translateY(-140%); padding: 10px 14px;
  background: var(--ink); color: #fff; border-radius: 8px;
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(246, 243, 237, .9);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { border-color: var(--line); box-shadow: 0 8px 30px rgba(11,25,37,.04); }
.header-inner { min-height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 13px; min-width: 0; }
.brand-mark {
  width: 42px; height: 42px; border: 1px solid var(--ink); border-radius: 50%;
  display: grid; place-items: center; font-family: Georgia, "Times New Roman", serif; font-size: 22px;
}
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy strong { font-size: 17px; letter-spacing: -.04em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 10px; letter-spacing: .04em; }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 700; }
.site-nav a { position: relative; padding-block: 6px; }
.site-nav a:not(.nav-contact)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--ink); transition: right .2s ease;
}
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }
.nav-contact { padding: 10px 17px !important; color: #fff; background: var(--navy); border-radius: 999px; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; padding: 10px; background: transparent; }
.nav-toggle span { display: block; width: 100%; height: 1.5px; margin: 6px 0; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }

.hero { padding: 58px 0 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(480px, 1.08fr); gap: clamp(44px, 7vw, 96px); align-items: center; }
.hero-copy { padding: 18px 0 72px; }
.eyebrow { margin: 0 0 19px; font-size: 12px; font-weight: 800; letter-spacing: .16em; color: var(--teal); }
.hero h1, .section h2, .field-card h3, .work-item h3 { text-wrap: balance; }
.hero h1 {
  margin: 0; max-width: 720px; font-size: clamp(52px, 6.4vw, 88px); line-height: .99; letter-spacing: -.067em; font-weight: 750;
}
.hero h1 em { color: var(--teal); font-style: normal; font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.055em; }
.hero-lead { margin: 32px 0 0; max-width: 670px; color: #44525d; font-size: clamp(17px, 1.5vw, 20px); line-height: 1.82; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 49px; padding: 0 20px;
  border: 1px solid var(--ink); border-radius: 3px; font-weight: 800; font-size: 14px; transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--navy); border-color: var(--navy); color: #fff; }
.button.ghost { background: transparent; }
.button.ghost:hover { background: var(--ink); color: #fff; }
.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 42px 0 0; border-top: 1px solid var(--line); }
.hero-facts div { padding: 18px 18px 0 0; }
.hero-facts dt { color: var(--muted); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.hero-facts dd { margin: 5px 0 0; font-weight: 750; font-size: 14px; }
.hero-visual { margin: 0; position: relative; }
.hero-image-wrap { position: relative; aspect-ratio: 4 / 4.2; overflow: hidden; background: var(--paper-2); }
.hero-image-wrap::after {
  content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(4,21,34,.30)); pointer-events: none;
}
.hero-image-wrap img { width: 100%; height: 100%; object-fit: cover; object-position: 61% center; transform: scale(1.18); }
.image-index {
  position: absolute; z-index: 2; left: 18px; bottom: 17px; color: rgba(255,255,255,.85); font-size: 10px; font-weight: 800; letter-spacing: .14em;
}
.hero-visual figcaption { display: flex; justify-content: space-between; gap: 18px; margin-top: 12px; color: var(--muted); font-size: 11px; letter-spacing: .05em; }
.hero-ribbon {
  margin-top: 0; min-height: 48px; display: flex; align-items: center; justify-content: center; gap: clamp(18px, 3vw, 50px); overflow: hidden;
  background: var(--navy); color: rgba(255,255,255,.8); white-space: nowrap; font-size: 10px; font-weight: 800; letter-spacing: .18em;
}
.hero-ribbon i { width: 4px; height: 4px; border-radius: 50%; background: var(--sand); }

.section { padding: clamp(92px, 10vw, 148px) 0; }
.section-number { margin: 0 0 12px; color: var(--sand); font: 700 13px/1 Georgia, serif; letter-spacing: .08em; }
.section h2 { margin: 0; font-size: clamp(40px, 5vw, 67px); line-height: 1.08; letter-spacing: -.058em; font-weight: 750; }
.section-grid { display: grid; grid-template-columns: .72fr 1.55fr; gap: clamp(48px, 8vw, 120px); }
.section-intro { position: sticky; top: calc(var(--header-h) + 28px); align-self: start; }
.section-intro h2 { font-size: clamp(38px, 4.2vw, 58px); }

.about { background: #fff; }
.about-content { display: grid; gap: 52px; }
.about-statement { max-width: 780px; }
.lead-quote { margin: 0; font-size: clamp(25px, 2.9vw, 38px); line-height: 1.52; letter-spacing: -.045em; font-weight: 650; }
.about-statement > p:last-child { margin: 24px 0 0; max-width: 720px; color: var(--muted); font-size: 17px; }
.profile-panel { display: grid; grid-template-columns: 235px 1fr; min-height: 310px; background: var(--paper); border-top: 1px solid var(--ink); }
.profile-panel > img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; filter: saturate(.84) contrast(.98); }
.profile-panel-copy { padding: 30px 34px; }
.profile-name { margin: 0; font-size: 27px; font-weight: 800; letter-spacing: -.045em; }
.profile-name span { margin-left: 8px; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .06em; }
.profile-role { margin: 7px 0 24px; color: var(--teal); font-weight: 700; }
.career-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.career-list li { display: grid; grid-template-columns: 54px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.career-list span { color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.career-list strong { font-size: 14px; font-weight: 650; }

.research { background: var(--paper); }
.section-head { display: grid; grid-template-columns: .72fr 1.55fr; gap: clamp(48px, 8vw, 120px); align-items: end; margin-bottom: 52px; }
.section-head > div:last-child > p { margin: 22px 0 0; max-width: 680px; color: var(--muted); font-size: 17px; }
.research-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.research-card {
  grid-column: span 6; min-height: 390px; padding: 30px; position: relative; overflow: hidden;
  background: #fff; border: 1px solid var(--line); transition: transform .25s ease, box-shadow .25s ease;
}
.research-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.research-card.featured { background: #dce9e5; border-color: transparent; }
.research-card.dark { background: var(--navy); border-color: var(--navy); color: #fff; }
.card-index { position: absolute; right: 24px; top: 22px; color: rgba(11,25,37,.28); font: 700 12px/1 Georgia,serif; }
.dark .card-index { color: rgba(255,255,255,.42); }
.card-icon { width: 58px; height: 58px; padding: 13px; border: 1px solid currentColor; border-radius: 50%; }
.card-icon svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.research-card h3 { margin: 54px 0 15px; font-size: clamp(28px, 3vw, 40px); line-height: 1.15; letter-spacing: -.05em; }
.research-card p { margin: 0; max-width: 560px; color: var(--muted); }
.research-card.dark p { color: rgba(255,255,255,.68); }
.research-card ul { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 26px 0 0; padding: 0; }
.research-card li { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; font-size: 11px; font-weight: 800; }
.research-card.dark li { border-color: var(--line-light); color: rgba(255,255,255,.86); }

.work { background: var(--navy); color: #fff; }
.work-layout { display: grid; grid-template-columns: .72fr 1.55fr; gap: clamp(48px, 8vw, 120px); }
.work-heading { position: sticky; top: calc(var(--header-h) + 28px); align-self: start; }
.work .eyebrow { color: #7eb9b1; }
.work-heading h2 { font-size: clamp(40px, 4.3vw, 58px); }
.work-heading > p:not(.section-number):not(.eyebrow) { margin: 22px 0 0; color: rgba(255,255,255,.63); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 32px; border-bottom: 1px solid rgba(255,255,255,.35); padding-bottom: 4px; font-weight: 750; }
.work-list { border-top: 1px solid rgba(255,255,255,.28); }
.work-item { padding: 27px 0 29px; border-bottom: 1px solid rgba(255,255,255,.18); }
.work-item > div { display: flex; justify-content: space-between; gap: 18px; color: rgba(255,255,255,.52); font-size: 11px; letter-spacing: .1em; }
.work-type { color: #d6c28f; font-weight: 800; }
.work-item h3 { margin: 12px 0 0; max-width: 850px; font-size: clamp(23px, 2.5vw, 33px); line-height: 1.32; letter-spacing: -.04em; font-weight: 650; }

.field { background: #fff; }
.field-gallery { display: grid; grid-template-columns: 1.25fr .75fr; grid-template-rows: repeat(2, minmax(270px, 1fr)); gap: 16px; }
.field-card { position: relative; overflow: hidden; min-height: 310px; background: var(--ink); }
.field-card.large { grid-row: 1 / span 2; min-height: 650px; }
.field-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .65s cubic-bezier(.2,.7,.2,1); }
.field-card.large img { object-position: 50% 35%; }
.field-card.sea img { object-position: center 68%; }
.field-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(2,18,29,.76)); }
.field-card:hover img { transform: scale(1.035); }
.field-card-copy { position: absolute; z-index: 2; left: 28px; right: 28px; bottom: 26px; color: #fff; }
.field-card-copy span { font-size: 10px; font-weight: 800; letter-spacing: .16em; color: rgba(255,255,255,.72); }
.field-card-copy h3 { margin: 9px 0 0; max-width: 700px; font-size: clamp(26px, 3vw, 41px); line-height: 1.2; letter-spacing: -.045em; }
.field-card:not(.large) .field-card-copy h3 { font-size: clamp(22px, 2vw, 29px); }
.field-card-copy p { margin: 12px 0 0; max-width: 620px; color: rgba(255,255,255,.78); font-size: 14px; }

.contact { background: var(--paper); }
.contact-grid { display: grid; grid-template-columns: .86fr 1.14fr; gap: clamp(48px, 8vw, 110px); align-items: start; }
.contact-copy { position: sticky; top: calc(var(--header-h) + 28px); }
.contact-copy h2 { font-size: clamp(40px, 4.6vw, 62px); }
.contact-copy > p:not(.section-number):not(.eyebrow) { max-width: 600px; margin: 22px 0 0; color: var(--muted); }
.contact-details { margin-top: 42px; border-top: 1px solid var(--line); }
.contact-details > div { display: grid; grid-template-columns: 95px 1fr; gap: 18px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.contact-details span { color: var(--muted); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.contact-details a, .contact-details strong { font-size: 14px; font-weight: 700; overflow-wrap: anywhere; }
.contact-form { background: #fff; padding: clamp(26px, 4vw, 44px); border: 1px solid var(--line); box-shadow: var(--shadow); }
.contact-form label { display: block; margin-bottom: 22px; }
.contact-form label > span { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 800; letter-spacing: .02em; }
.form-row.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; border: 0; border-bottom: 1px solid #bfc6c8; border-radius: 0; background: transparent; color: var(--ink); padding: 12px 2px;
  outline: none; transition: border-color .18s ease, box-shadow .18s ease;
}
.contact-form textarea { min-height: 150px; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--teal); box-shadow: 0 1px 0 var(--teal); }
.contact-form ::placeholder { color: #a2aaad; }
.submit { width: 100%; margin-top: 6px; border-radius: 0; min-height: 55px; }
.form-note { margin: 12px 0 0; color: var(--muted); font-size: 11px; }

.site-footer { padding: 42px 0; background: #081c2b; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: end; }
.footer-name { margin: 0; font-size: 20px; font-weight: 800; }
.footer-name span { margin-left: 6px; color: rgba(255,255,255,.46); font-size: 10px; letter-spacing: .12em; }
.footer-grid > div:first-child > p:last-child { margin: 6px 0 0; color: rgba(255,255,255,.55); font-size: 12px; }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; font-size: 12px; font-weight: 700; }
.copyright { grid-column: 1 / -1; margin: 10px 0 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.42); font-size: 10px; letter-spacing: .08em; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .72s ease, transform .72s cubic-bezier(.2,.7,.2,1); }
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .08s; }
.delay-2 { transition-delay: .16s; }

:focus-visible { outline: 3px solid rgba(42,119,111,.34); outline-offset: 4px; }

@media (max-width: 1020px) {
  :root { --shell: min(100% - 36px, 900px); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { padding-bottom: 22px; }
  .hero-visual { width: min(100%, 760px); margin-left: auto; }
  .hero-image-wrap { aspect-ratio: 16 / 10; }
  .hero-image-wrap img { object-position: 61% 36%; transform: scale(1.08); }
  .section-grid, .section-head, .work-layout, .contact-grid { grid-template-columns: 1fr; }
  .section-intro, .work-heading, .contact-copy { position: static; }
  .about-content { gap: 38px; }
  .research-card { grid-column: span 6; }
  .field-gallery { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .field-card.large { grid-column: 1 / -1; grid-row: auto; min-height: 520px; }
  .field-card:not(.large) { min-height: 360px; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100% - 28px); --header-h: 68px; }
  .brand-copy small { display: none; }
  .brand-mark { width: 38px; height: 38px; }
  .site-nav {
    position: fixed; inset: var(--header-h) 0 auto 0; display: grid; gap: 0; padding: 12px 20px 22px;
    background: var(--paper); border-bottom: 1px solid var(--line); transform: translateY(-130%); opacity: 0; pointer-events: none;
    transition: transform .25s ease, opacity .25s ease;
  }
  .site-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .site-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-contact { margin-top: 10px; padding: 12px 16px !important; text-align: center; border-bottom: 0 !important; }
  .nav-toggle { display: block; }
  .nav-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  .hero { padding-top: 34px; }
  .hero h1 { font-size: clamp(46px, 14vw, 67px); }
  .hero-lead { margin-top: 24px; font-size: 16px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts div { display: grid; grid-template-columns: 70px 1fr; gap: 14px; padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero-facts dd { margin: 0; }
  .hero-image-wrap { aspect-ratio: 4 / 3.4; }
  .hero-visual figcaption { flex-direction: column; gap: 1px; }
  .hero-ribbon { justify-content: flex-start; padding-inline: 18px; }

  .section { padding: 82px 0; }
  .section h2 { font-size: clamp(36px, 11vw, 52px); }
  .section-head { margin-bottom: 34px; }
  .profile-panel { grid-template-columns: 1fr; }
  .profile-panel > img { height: 310px; object-position: center 16%; }
  .profile-panel-copy { padding: 24px 20px; }
  .career-list li { grid-template-columns: 48px 1fr; }
  .research-grid { display: grid; grid-template-columns: 1fr; }
  .research-card { grid-column: auto; min-height: 350px; padding: 24px; }
  .research-card h3 { margin-top: 42px; }
  .field-gallery { grid-template-columns: 1fr; }
  .field-card.large, .field-card:not(.large) { min-height: 420px; }
  .field-card-copy { left: 20px; right: 20px; bottom: 20px; }
  .form-row.two { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 24px 20px; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; }
  .footer-nav { gap: 16px; }
}

@media (max-width: 430px) {
  .hero-actions .button { width: 100%; }
  .hero-image-wrap { aspect-ratio: 1 / 1.05; }
  .hero-image-wrap img { object-position: 62% center; transform: scale(1.12); }
  .lead-quote { font-size: 24px; }
  .profile-panel > img { height: 280px; }
  .work-item h3 { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}