@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800;900&family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');
:root {
  /* Base */
  --bg: #f7f9fc;
  --bg-soft: #ffffff;
  --text: #111827;
  --muted: #64748b;
  --line: #d9e2f0;
  --card: #ffffff;
  --max-width: 1180px;

  /* Navy */
  --navy: #032060;
  --navy-dark: #021743;
  --navy-light: #e8eef9;

  /* Orange */
  --orange: #f28c28;
  --orange-dark: #d96f0f;
  --orange-light: #fff1e3;

  /* Teal */
  --teal: #18a6a6;
  --teal-dark: #0d7f82;
  --teal-light: #e3f5f4;

  /* Accent */
  --accent: #bfd0f2;
}
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Montserrat", "Noto Sans KR", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

.container {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.narrow {
  max-width: 850px;
}


/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 249, 252, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-container {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

/* Header Logo */

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--navy-dark);
}

.site-header .logo .header-logo {
  width: 28px !important;
  height: 28px !important;

  min-width: 28px !important;
  min-height: 28px !important;

  max-width: 28px !important;
  max-height: 28px !important;

  flex: 0 0 28px;

  object-fit: contain;

  position: static !important;
  inset: auto !important;

  transform: none !important;
}

.main-nav {
  display: flex;
  gap: 26px;
  font-size: 14px;
  font-weight: 600;
  color: #334155;
}

.main-nav a {
  transition: color 0.2s ease;
}

.main-nav a:hover {
  color: var(--navy);
}

/* ================================
   Mobile Menu
================================ */

/* PC에서는 햄버거 버튼 숨김 */
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;

  border: 0;
  background: transparent;
  cursor: pointer;

  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

/* 햄버거 선 */
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;

  background: var(--navy-dark);
  border-radius: 2px;

  transition:
    transform 0.25s ease,
    opacity 0.25s ease;
}

/* 메뉴가 열렸을 때 X 모양 */
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ================================
   Tablet / Mobile Navigation
================================ */

@media (max-width: 960px) {

  /* 햄버거 버튼 표시 */
  .menu-toggle {
    display: flex;
  }

  /* 메뉴 기본 상태 = 닫힘 */
  .main-nav {
    display: none;

    position: absolute;
    top: calc(100% + 8px);
    right: 0;

    width: min(300px, calc(100vw - 28px));

    flex-direction: column;
    gap: 0;

    padding: 10px;

    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 16px;

    box-shadow: 0 16px 40px rgba(2, 23, 67, 0.14);

    z-index: 1000;
  }

  /* 햄버거 버튼 클릭했을 때 */
  .main-nav.active {
    display: flex;
  }

  .main-nav a {
    display: block;

    padding: 13px 16px;

    font-size: 15px;
    font-weight: 600;

    border-radius: 10px;
  }

  .main-nav a:hover {
    background: var(--navy-light);
    color: var(--navy-dark);
  }
}


/* 메뉴로 이동했을 때
   sticky header에 제목이 가려지지 않도록 */
section[id] {
  scroll-margin-top: 90px;
}

/* Hero */

.hero {
  min-height: calc(100vh - 32px);
  display: flex;
  align-items: center;
  padding: 80px 0;
  background:
    radial-gradient(
      circle at 82% 25%,
      rgba(242, 140, 40, 0.08),
      transparent 24%
    ),
    radial-gradient(
      circle at top right,
      rgba(24, 166, 166, 0.10),
      transparent 38%
    ),
    linear-gradient(
      180deg,
      #f7f9fc 0%,
      #edf2fb 100%
    );
}

/* Hero Lab Image */

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-lab-image {
  width: 100%;
  max-width: 520px;
  height: auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.eyebrow,
.section-kicker,
.project-tag,
.card-label {
  margin: 0 0 18px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy);
}

/* 랩 이름 - 키우기 */
.hero .eyebrow {
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  max-width: 850px;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.05em;
  color: var(--navy-dark);
}

.hero-description {
  max-width: 720px;
  margin: 28px 0 0;
  font-size: 20px;
  color: #334155;
  word-break: keep-all;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  margin-top: 38px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--navy);
  color: white;
  box-shadow: 0 10px 24px rgba(3, 32, 96, 0.18);
}

.btn-primary:hover {
  background: var(--navy-dark);
  box-shadow: 0 10px 26px rgba(242, 140, 40, 0.18);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.55);
  color: var(--navy-dark);
  border: 1px solid var(--navy);
}

.btn-secondary:hover {
  background: var(--navy-light);
}

.hero-card {
  background: var(--navy-dark);
  color: white;
  padding: 34px;
  border-radius: 28px;
  box-shadow: 0 24px 70px rgba(2, 23, 67, 0.22);
}

.hero-card .card-label {
  color: var(--accent);
}

.hero-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero-card li {
  position: relative;
  padding: 16px 0 16px 28px;
  border-bottom: 1px solid rgba(255,255,255,0.16);
  font-size: 17px;
}

.hero-card li:last-child {
  border-bottom: 0;
}

.hero-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Common Sections */

.section {
  padding: 100px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 30px;
  margin-bottom: 42px;
}

.section h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.05em;
  color: var(--navy-dark);
}

.section p {
  font-size: 18px;
  color: #334155;
  word-break: keep-all;
}

.about-section {
  background: var(--bg-soft);
}

.about-section p {
  max-width: 820px;
}

/* Research */

.research-section {
  padding: 100px 0;
}

.research-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 40px;
}

.research-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(24, 166, 166, 0.22);
}

.section-kicker {
  color: var(--teal-dark);
}

.projects-section .section-kicker {
  color: var(--orange-dark);
}

.research-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;

  border-radius: 50%;
  background: var(--orange-light);
}

.research-icon .material-symbols-outlined {
  font-size: 26px;
  color: var(--orange-dark);

  font-variation-settings:
    'FILL' 0,
    'wght' 400,
    'GRAD' 0,
    'opsz' 32;
}

.research-item p {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.4;
  font-weight: 600;
  color: #0d2a66;
}

/* =========================================
   Projects
========================================= */

.projects-section {
  background: #f6f8fb;
}


/* Section Header */

.projects-section .section-header {
  margin-bottom: 30px;
}

.projects-section .section-kicker {
  margin-bottom: 8px;
  color: var(--orange);
}

.projects-section .section-header h2 {
  margin-bottom: 0;
}

.projects-intro {
  max-width: 820px;
  margin: 12px 0 0;

  font-size: 15px;
  line-height: 1.6;
  color: #64748b;
}


/* Project Grid */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}


/* Project Card */

.project-card {
  position: relative;

  display: flex;
  flex-direction: column;

  min-width: 0;
  height: 100%;

  padding: 28px 26px 30px;

  background: #ffffff;

  border: 1px solid var(--line);
  border-radius: 18px;

  box-shadow:
    0 8px 24px rgba(2, 23, 67, 0.06);

  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.project-card:hover {
  transform: translateY(-3px);

  border-color: #d5dce7;

  box-shadow:
    0 14px 32px rgba(2, 23, 67, 0.09);
}


/* Project Number */

.project-number {
  margin: 0 0 8px;

  font-size: 13px !important;
  font-weight: 800;

  text-transform: uppercase;
  letter-spacing: 0.06em;

  color: var(--orange) !important;
}


/* Project Title */

.project-card h3 {
  margin: 0 0 24px;

  min-height: 86px;

  font-size: 23px;
  line-height: 1.18;
  letter-spacing: -0.03em;

  color: var(--navy-dark);
}


/* Focus / Approach */

.project-info-group {
  padding: 15px 0;

  border-top: 1px solid #e5e9ef;
}

.project-label {
  margin: 0 0 10px;

  font-size: 12px;
  line-height: 1;
  font-weight: 800;

  letter-spacing: 0.03em;

  color: var(--navy-dark);
}


/* Tags */

.project-tags {
  display: flex;
  flex-wrap: wrap;

  gap: 8px;
}

.project-tags span {
  display: inline-flex;
  align-items: center;

  min-height: 30px;

  padding: 5px 12px;

  border-radius: 7px;

  font-size: 12px;
  line-height: 1.3;
  font-weight: 500;
}


/* Focus Tags - Orange */

.focus-tags span {
  color: var(--orange-dark);

  background: #fff8f3;

  border: 1px solid #ffcaaa;
}


/* Approach Tags - Blue */

.approach-tags span {
  color: var(--navy);

  background: #f3f8ff;

  border: 1px solid #bfd8f6;
}


/* Description */

.project-description {
  margin: 3px 0 0 !important;
  padding-top: 3px;

  font-size: 13.5px !important;
  line-height: 1.7;

  color: #64748b !important;
}


/* Tablet */

@media (max-width: 1050px) {

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

  .project-card h3 {
    min-height: auto;
  }
}


/* Mobile */

@media (max-width: 720px) {

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .project-card {
    padding: 24px 22px 26px;
  }

  .project-card h3 {
    min-height: auto;

    font-size: 22px;
  }

  .projects-intro {
    font-size: 14px;
  }
}
/* Tablet */
@media (max-width: 960px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}
/* People */

.people-section {
  background: var(--bg-soft);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: start;
}

.people-text p {
  margin-top: 0;
}

.text-link {
  display: inline-block;
  margin-top: 12px;
  font-weight: 800;
  color: var(--navy);
  border-bottom: 2px solid var(--navy);
}


/* 모바일 */
@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero .eyebrow {
    font-size: 14px;
  }

  .hero-description {
    font-size: 17px;
  }

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

  .research-card {
    min-height: 260px;
  }

  .section h2 {
    font-size: 34px;
  }

  .section p {
    font-size: 16px;
  }

  .contact-box {
    padding: 36px 24px;
    border-radius: 24px;
  }

  .footer-container {
    flex-direction: column;
  }
}

/* Responsive */

@media (max-width: 960px) {


  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .research-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-item {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section {
    padding: 78px 0;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero .eyebrow {
    font-size: 14px;
  }

  .hero-description {
    font-size: 17px;
  }

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

  .research-card {
    min-height: 260px;
  }

  .section h2 {
    font-size: 34px;
  }

  .section p {
    font-size: 16px;
  }

  .contact-box {
    padding: 36px 24px;
    border-radius: 24px;
  }

  .footer-container {
    flex-direction: column;
  }
}

/* ========================================
   Compact Publications
======================================== */


/* 전체 목록 */
.publications-section {
  background: var(--bg);
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}


/* 필터 */

.publication-controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.filter-btn {
  padding: 6px 11px;
  font-size: 12px;
  line-height: 1.2;
}

/* ========================================
   Publication Filter Buttons
======================================== */

.publication-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.filter-btn {
  padding: 7px 13px;

  background: #ffffff;
  color: var(--navy-dark);

  border: 1px solid var(--line);
  border-radius: 999px;

  font-family: inherit;
  font-size: 12px;
  font-weight: 700;

  cursor: pointer;

  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.filter-btn:hover {
  background: var(--navy-light);
  border-color: var(--navy);
  color: var(--navy-dark);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

/* ========================================
   Year Toggle
======================================== */

.publication-year-group {
  width: 100%;
}


/* 연도 전체를 버튼으로 */

.publication-year-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 9px;

  padding: 9px 2px;

  background: transparent;
  border: none;
  border-bottom: 1.5px solid var(--navy-dark);

  color: var(--navy-dark);

  cursor: pointer;
  text-align: left;
}


/* +/- 아이콘 */

.publication-year-icon {
  margin-left: auto;

  font-size: 19px;
  font-weight: 400;

  color: var(--muted);

  transition: transform 0.2s ease;
}



/* 접힌 상태 */

.publication-year-content.is-collapsed {
  display: none;
}


/* ========================================
   Publication Item
======================================== */

/* =========================
   Publication Typography
========================= */

/* 연도 */
.publication-year-title {
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
}

.publication-year-count {
  font-size: 10px;
  font-weight: 700;
}


/* 개별 실적 카드 */
.publication-item {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 10px;

  padding: 11px 14px;
  margin-bottom: 6px;

  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.publication-item:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(2, 23, 67, 0.05);
}

/* Journal Article / Published */
.publication-item .publication-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}

.publication-item .publication-meta span {
  display: inline-flex;
  align-items: center;

  padding: 2px 7px;
  border-radius: 999px;

  font-size: 10px;
  font-weight: 700;
  line-height: 1.2;

  background: var(--navy-light);
  color: var(--navy-dark);
}

.publication-item .publication-meta .tag-ssci {
  background: #fde8e8;
  color: #a94442;
  border: 1px solid #f5c2c2;
}

/* 일반 태그 */
.publication-item .publication-meta .publication-tag {
  background: var(--teal-light);
  color: var(--teal-dark);
}


/* DOI */
.publication-doi {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--muted);
}

.publication-doi:hover {
  color: var(--navy);
  text-decoration: underline;
}


/* 제목 */
.publication-item h4 {
  margin: 0 0 4px;
  font-size: 15px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--navy-dark);
}


/* 저자 */
.publication-item .publication-authors {
  margin: 0 0 1px;
  font-size: 12.5px;
  line-height: 1.4;
  font-weight: 400;
  color: #334155;
}


/* 학술지명 */
.publication-item .publication-venue {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.4;
  font-weight: 400;
  font-style: italic;
  color: var(--muted);
}


/* DOI / Link */
.publication-item .publication-links a {
  font-size: 10.5px;
  line-height: 1.3;
}

.publication-bottom {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 5px;
}

.publication-links {
  display: inline-flex;
  gap: 8px;
  margin: 0;
}

.publication-links a {
  font-size: 10.5px;
  line-height: 1.3;
}

/* ========================================
   Mobile
======================================== */

@media (max-width: 620px) {

  .publication-year-title {
    font-size: 18px;
  }

  .publication-item {
    padding: 9px 11px;
  }

  .publication-item h4 {
    font-size: 14px;
  }

  .publication-authors,
  .publication-venue {
    font-size: 11.5px;
  }

}

/* 구성원 그룹 */
.member-group {
  margin-top: 56px;
}

.member-group-title {
  margin-bottom: 24px;
  font-size: 1.6rem;
  color: #0b2455;
}

/* 구성원 목록 */
.member-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

/* 개별 구성원 */
.member-card {
  display: flex;
  align-items: flex-start;
  gap: 22px;

  padding: 24px;
  background-color: #ffffff;
  border: 1px solid #dce4f1;
  border-radius: 18px;

  box-shadow: 0 8px 24px rgba(11, 36, 85, 0.06);
}

/* 사진 영역 */
.member-image-wrap {
  width: 120px;
  height: 150px;
  flex-shrink: 0;

  overflow: hidden;
  border-radius: 14px;
  background-color: #edf2fa;
}

/* 사진 */
.member-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

/* 정보 영역 */
.member-info {
  flex: 1;
  min-width: 0;
  padding-top: 4px;
}

.member-info h4 {
  margin: 0 0 8px;
  font-size: 1.2rem;
  line-height: 1.4;
  color: #071d49;
}

.member-info h4 span {
  display: block;
  margin-top: 3px;
  font-size: 0.92rem;
  font-weight: 500;
  color: #6c7890;
}

.member-role {
  margin: 0 0 14px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #274f91;
}

/* 관심 분야 */
.member-interests {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 16px;
}

.member-interests span {
  padding: 5px 9px;
  font-size: 0.78rem;
  line-height: 1.3;

  color: #254778;
  background-color: #edf3fc;
  border-radius: 999px;
}

/* 이메일, 웹사이트 */
.member-email {
  display: flex;
  align-items: center;
  gap: 7px;
  overflow-wrap: anywhere;
}

.email-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--orange-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.member-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.member-links a {
  font-size: 0.88rem;
  font-weight: 600;
  color: #173f7a;
  text-decoration: none;
}

.member-links a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .member-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .member-card {
    gap: 16px;
    padding: 18px;
  }

  .member-image-wrap {
    width: 92px;
    height: 116px;
  }

  .member-info h4 {
    font-size: 1.05rem;
  }
}