:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #111111;
  --muted: #6b6b6b;
  --line: #d9d9d9;
  --line-strong: #bdbdbd;
  --accent: #1f1f1f;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

html {
  scrollbar-gutter: stable;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1200px, calc(100% - 56px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 22px 0 18px;
}

.nav .logo {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: stretch;
  justify-content: flex-start;
  gap: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  width: fit-content;
}

.logo-mark-wrap {
  width: 132px;
  min-width: 132px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 14px;
}

.logo-mark {
  width: 125px;
  height: 42px;
  display: block;
  object-fit: contain;
  object-position: center center;
}

.logo-text-wrap {
  min-height: 45px;
  display: flex;
  align-items: center;
}

.logo-text {
  display: block;
  min-width: 0;
}

.logo small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
}

.nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0;
  margin: 0;
  padding: 0;
}

.nav li {
  border-left: 1px solid var(--line);
}

.nav li:last-child {
  border-right: 1px solid var(--line);
}

.nav ul a {
  min-width: 118px;
  padding: 10px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}

.nav a.active {
  background: #ffffff;
}

.nav-ko {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-en {
  font-size: 0.74rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-main {
  padding: 20px 0 48px;
}

.hero {
  display: block;
  padding: 4px 0 28px;
  border-bottom: 1px solid var(--line);
}

.hero-copy .eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  font-size: 2rem;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-copy .subtitle {
  margin: 18px 0 0;
  max-width: 920px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-copy .title-en {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  color: var(--muted);
  letter-spacing: 0.02em;
}

.hero-media-wrap {
  margin-top: 28px;
}

.hero-media {
  border: 1px solid var(--line);
  background: #fff;
  position: relative;
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  aspect-ratio: 16 / 9;
  background: #fff;
}

.hero-slider-track {
  display: flex;
  transition: transform 0.55s ease;
  will-change: transform;
}

.hero-slide {
  flex: 0 0 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.hero-slider-dots {
  position: absolute;
  left: 50%;
  bottom: 16px;
  display: flex;
  gap: 8px;
  transform: translateX(-50%);
}

.hero-slider-dot {
  width: 14px;
  height: 14px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(160, 160, 160, 0.8);
  cursor: pointer;
}

.hero-slider-dot.is-active {
  background: #6f6f6f;
}

.hero-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.section {
  padding: 24px 0 0;
}

.compact-section {
  padding-top: 20px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.section-title {
  margin: 0;
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-title-compact {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  letter-spacing: -0.02em;
}

.section-title-compact .section-en {
  margin-top: 4px;
  font-size: 0.72rem;
}

.section-title .section-en {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-copy {
  margin: 0;
  max-width: 780px;
  color: var(--muted);
}

.line-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.line-card {
  min-height: 210px;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.line-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.line-card p {
  margin: 0;
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 36px;
  align-items: start;
}

.detail-block,
.line-panel {
  border-top: 1px solid var(--line);
}

.detail-row,
.notice-item,
.pub-item,
.contact-row {
  display: grid;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.detail-row {
  grid-template-columns: 150px minmax(0, 1fr);
}

.detail-label,
.notice-date,
.pub-year,
.contact-label {
  color: var(--muted);
  font-weight: 600;
}

.detail-value,
.notice-body,
.pub-title,
.contact-value {
  min-width: 0;
}

.notice-board {
  border-top: 1px solid var(--line);
}

.notice-layout {
  display: grid;
  grid-template-columns: minmax(340px, 0.9fr) minmax(0, 1.1fr);
  gap: 32px;
}

.notice-list-head {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}

.notice-board-list {
  border-top: 0;
}

.notice-item {
  grid-template-columns: 140px minmax(0, 1fr);
}

.notice-trigger {
  width: 100%;
  border: 0;
  background: #ffffff;
  text-align: left;
  cursor: pointer;
}

.notice-trigger.is-active {
  background: #ffffff;
}

.notice-trigger:hover .notice-title,
.notice-trigger.is-active .notice-title {
  text-decoration: underline;
}

.notice-title {
  margin: 0 0 8px;
  font-size: 1.12rem;
}

.notice-detail-panel {
  border-top: 1px solid var(--line);
}

.notice-view {
  padding: 18px 0 0;
}

.notice-view-title {
  margin: 12px 0 14px;
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: -0.03em;
}

.notice-view-content {
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  white-space: pre-wrap;
}

.notice-source {
  display: none;
}

.notice-body p {
  margin: 0;
  color: var(--muted);
}

.notice-guide {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.people-grid-single {
  grid-template-columns: 1fr;
}

.person-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.person-photo {
  border: 1px solid var(--line);
  aspect-ratio: 4 / 5;
  background: #ffffff;
}

.person-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.person-name {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.person-role {
  margin: 0 0 8px;
  color: var(--muted);
}

.person-meta {
  margin: 0;
  padding: 0;
  list-style: none;
}

.person-meta li {
  padding: 6px 0;
  border-top: 1px solid var(--line);
}

.person-meta li:last-child {
  border-bottom: 1px solid var(--line);
}

.person-profile-groups {
  border-top: 1px solid var(--line);
}

.person-profile-group + .person-profile-group {
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

.person-group-title {
  margin: 0 0 2px;
  font-size: 0.92rem;
}

.person-profile-link {
  margin: 0 0 8px;
}

.person-profile-link a:hover {
  text-decoration: underline;
}

.person-profile-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.person-profile-list li {
  padding: 1px 0;
}

.person-line-ko,
.person-line-en {
  display: block;
}

.person-line-en {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.pub-list {
  border-top: 1px solid var(--line);
}

.pub-more {
  margin-top: 10px;
}

.pub-more summary {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
}

.pub-more summary::-webkit-details-marker {
  display: none;
}

.pub-more .less-label {
  display: none;
}

.pub-more[open] .more-label {
  display: none;
}

.pub-more[open] .less-label {
  display: inline;
}

.pub-more[open] summary {
  margin-bottom: 0;
}

.pub-item {
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
}

.research-page .research-section {
  padding-top: 40px;
}

.research-page .section-head {
  margin-bottom: 28px;
}

.research-page .detail-row,
.research-page .pub-item {
  padding: 5px 0;
}

.research-page .pub-item {
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 20px;
}

.research-page .line-grid {
  margin-top: 8px;
}

.research-page .line-card {
  min-height: 0;
  padding: 14px;
}

.research-page .line-card h3 {
  margin-bottom: 6px;
}

.research-page .line-card p {
  line-height: 1.55;
}

.research-page .bilingual-ko,
.research-page .bilingual-en {
  display: block;
}

.research-page .bilingual-en {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.88em;
  line-height: 1.45;
  font-weight: 500;
}

.research-page .detail-label .bilingual-en {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.research-page .detail-value .bilingual-en,
.research-page .pub-title .bilingual-en,
.research-page .line-card p .bilingual-en {
  margin-top: 2px;
}

.contact-page .bilingual-ko,
.contact-page .bilingual-en {
  display: block;
}

.contact-page .bilingual-en {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.88em;
  line-height: 1.45;
  font-weight: 500;
}

.contact-page .contact-label .bilingual-en {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pub-title {
  font-weight: 600;
  font-size: 0.94rem;
  line-height: 1.45;
}

.pub-authors {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

.pub-meta {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.35;
}

.outline-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
}

.outline-button:hover {
  border-color: var(--line-strong);
}

.contact-list {
  border-top: 1px solid var(--line);
}

.contact-row {
  grid-template-columns: 180px minmax(0, 1fr);
}

.site-footer {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer .container {
  padding: 20px 0 36px;
  font-size: 0.92rem;
}

@media (max-width: 1080px) {
  .nav {
    flex-direction: column;
    align-items: stretch;
  }

  .nav ul {
    justify-content: flex-start;
  }

  .two-column,
  .notice-layout {
    grid-template-columns: 1fr;
  }

  .line-grid,
  .people-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100%, calc(100% - 28px));
  }

  .logo-mark-wrap {
    width: 92px;
    min-width: 92px;
  }

  .logo-mark {
    width: 85px;
    height: 31px;
  }

  .logo-text-wrap {
    min-height: 31px;
  }

  .nav ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nav li:nth-child(2n) {
    border-right: 1px solid var(--line);
  }

  .nav li:last-child {
    border-right: 1px solid var(--line);
  }

  .person-card {
    grid-template-columns: 1fr;
  }

  .detail-row,
  .notice-item,
  .pub-item,
  .contact-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}