/* ============================================================
   AXIS Lab 공통 스타일시트

   수정 순서 권장:
   1) 색상 변경: :root 변수
   2) 글꼴/본문 크기: body
   3) 각 영역 디자인: 번호가 붙은 주석 아래
   4) 모바일 디자인: 파일 하단 @media 영역
   ============================================================ */

/* 1. 사이트 전체 색상과 최대 너비 변수 */
:root {
  --paper: #f6f4ee;
  --panel: #fff;
  --ink: #1d1b18;
  --ink2: #565049;
  --muted: #8a8378;
  --brand: #264b8c;
  --brand2: #173665;
  --line: rgba(29,27,24,.14);
  --blue: #2d6cdf;
  --teal: #0e8c7f;
  --green: #2fa35b;
  --purple: #7a4fd0;
  --orange: #e08a1e;
  --max: 1120px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans KR",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size: 16.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand2);
}

.wrap {
  width: min(var(--max),calc(100% - 48px));
  margin: auto;
}

/* 2. 상단 내비게이션 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,244,238,.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  width: min(var(--max),calc(100% - 48px));
  margin: auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.25rem;
}

.brand img {
  width: 48px;
  height: 48px;
}

.brand b {
  font-size: 1.35rem;
}

.axis-x {
  background: linear-gradient(135deg,#2062c6,#0e9488 52%,#1e9e57);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: .73rem;
  color: var(--ink2);
  padding: 8px 0;
  position: relative;
}

.nav-links a:after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  height: 2px;
  width: 0;
  background: var(--brand);
  transition: .25s;
}

.nav-links a:hover:after,.nav-links a.active:after {
  width: 100%;
}

.nav-links a.active {
  color: var(--ink);
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  padding: 8px 11px;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  color: var(--ink);
  cursor: pointer;
}

.eyebrow {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .71rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--brand);
  display: flex;
  align-items: center;
  gap: 10px;
}

.eyebrow:before {
  content: "";
  width: 25px;
  height: 1px;
  background: currentColor;
}

.eyebrow.light {
  color: #dfeaff;
}

/* 3. 메인 페이지 히어로 영역 */
.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 0 78px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0,1.45fr) minmax(260px,.55fr);
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: clamp(3rem,6.2vw,5.5rem);
  line-height: 1.01;
  letter-spacing: -.03em;
  margin: 24px 0;
}

.hero h1 span {
  color: var(--brand);
}

.hero-copy {
  max-width: 64ch;
  font-size: 1.08rem;
  color: var(--ink2);
}

.hero-actions,.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(29,27,24,.25);
  padding: 10px 18px;
  border-radius: 999px;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-size: .72rem;
  color: var(--ink);
  background: rgba(255,255,255,.55);
  transition: .2s;
}

.button:hover {
  transform: translateY(-2px);
  border-color: var(--brand);
}

.button.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.button.white {
  background: #fff;
  border-color: #fff;
  color: var(--brand);
}

.hero-mark img {
  width: min(100%,360px);
  margin: auto;
  filter: drop-shadow(0 28px 30px rgba(38,75,140,.16));
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(68px);
  opacity: .32;
}

.o1 {
  width: 430px;
  height: 430px;
  background: #2d6cdf;
  right: -140px;
  top: -160px;
}

.o2 {
  width: 360px;
  height: 360px;
  background: #7a4fd0;
  left: -170px;
  top: 80px;
}

.o3 {
  width: 300px;
  height: 300px;
  background: #0e8c7f;
  right: 28%;
  bottom: -180px;
}

/* 4. 공지사항 및 모집 강조 영역 */
.announcement-band,.join-strip {
  background: linear-gradient(120deg,#173665,#264b8c 55%,#146e69);
  color: #fff;
}

.announcement-band {
  padding: 54px 0;
}

.announcement-grid {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 60px;
}

.announcement-band h2,.join-strip h2 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: clamp(2rem,4vw,3.1rem);
  line-height: 1.08;
  margin-top: 14px;
}

.announcements article {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,.25);
}

.announcements time {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .75rem;
  color: #b9e3dc;
}

.announcements h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.2rem;
}

.announcements p {
  color: rgba(255,255,255,.75);
  font-size: .92rem;
  margin-top: 4px;
}

/* 5. 공통 섹션과 제목 */
.section {
  padding: 82px 0;
}

.section.soft {
  background: #eeece5;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 34px;
}

.section-heading>span {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  color: var(--brand);
}

.section-heading h2 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: clamp(1.9rem,4vw,2.8rem);
  line-height: 1.1;
  margin-top: 8px;
}

.section-heading .text-link {
  margin-left: auto;
  font-size: .86rem;
}

/* 6. 연구 분야 카드 */
.research-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 16px;
}

.research-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  padding: 26px 22px;
  min-height: 270px;
  display: flex;
  flex-direction: column;
  transition: .25s;
  color: var(--ink);
}

.research-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 38px -24px rgba(29,27,24,.5);
}

.research-card b {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .7rem;
  color: var(--accent);
  margin-bottom: 38px;
}

.research-card h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.35rem;
  line-height: 1.15;
}

.research-card p {
  color: var(--ink2);
  font-size: .91rem;
  margin-top: 12px;
}

.research-card span {
  margin-top: auto;
  padding-top: 18px;
  font-size: .78rem;
  color: var(--accent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  border: 1px solid var(--line);
  background: var(--line);
  gap: 1px;
}

.stats>div {
  background: var(--paper);
  padding: 28px;
  text-align: center;
}

.stats strong {
  display: block;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 3rem;
  color: var(--brand);
  line-height: 1;
}

.stats span {
  display: block;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: 10px;
}

.profile-split,.two-cols,.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  margin-top: 40px;
}

.profile-split h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.65rem;
}

.profile-split p {
  color: var(--ink2);
  margin-top: 10px;
}

.partner-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.partner-list span {
  border: 1px solid var(--line);
  background: #fff;
  padding: 10px 14px;
  font-size: .82rem;
}

.featured-pubs article {
  display: grid;
  grid-template-columns: 85px 1fr;
  gap: 22px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.featured-pubs time {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  color: var(--brand);
}

.featured-pubs h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.2rem;
}

.featured-pubs p {
  color: var(--ink2);
  margin-top: 3px;
}

.join-strip {
  padding: 58px 0;
}

.join-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.join-grid p {
  color: rgba(255,255,255,.78);
  margin-top: 10px;
}

/* 7. 서브페이지 제목 영역 */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 54px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(145deg,#f6f4ee,#eef2f8);
}

.page-hero h1 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: clamp(2.5rem,6vw,4.4rem);
  line-height: 1.04;
  margin-top: 16px;
}

.page-hero p {
  max-width: 70ch;
  color: var(--ink2);
  margin-top: 15px;
}

.research-detail>article {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.research-detail h2 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.8rem;
}

.research-detail p {
  color: var(--ink2);
  max-width: 82ch;
  margin-top: 10px;
}

.approach-grid,.member-cards {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 18px;
}

.approach-grid>div,.member-cards>article {
  background: #fff;
  border: 1px solid var(--line);
  padding: 25px;
}

.approach-grid h3,.member-cards h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.25rem;
}

.approach-grid p,.member-cards p {
  color: var(--ink2);
  font-size: .92rem;
  margin-top: 8px;
}

/* 8. PI 및 구성원 영역 */
.pi-profile {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 42px;
  align-items: start;
}

.pi-photo {
  aspect-ratio: 3/4;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(135deg,#2062c6,#0e9488,#1e9e57);
  display: grid;
  place-items: center;
}

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

.pi-photo:empty:after {
  content: "CJ";
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 4rem;
  color: #fff;
}

.pi-profile h2 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 2.5rem;
  margin: 12px 0;
}

.pi-profile p {
  color: var(--ink2);
  margin-bottom: 12px;
}

.timeline>article,.project-list>article {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 28px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.timeline time,.project-list time {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  color: var(--brand);
  font-size: .78rem;
}

.timeline h3,.project-list h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.18rem;
}

.timeline p,.project-list p {
  color: var(--ink2);
  font-size: .92rem;
  margin-top: 4px;
}

/* 9. 논문 목록 */
.publication-list {
  counter-reset: pub;
}

.publication-list article {
  position: relative;
  padding: 21px 0 21px 55px;
  border-top: 1px solid var(--line);
}

.publication-list article:before {
  counter-increment: pub;
  content: counter(pub,decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 23px;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  color: var(--muted);
  font-size: .76rem;
}

.publication-list h3 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 1.15rem;
  line-height: 1.35;
}

.publication-list .authors {
  font-size: .88rem;
  color: var(--ink2);
  margin-top: 7px;
}

.publication-list .journal {
  font-size: .88rem;
  color: var(--brand);
  margin-top: 4px;
}

.tag {
  display: inline-block;
  border: 1px solid var(--line);
  padding: 2px 6px;
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .62rem;
  text-transform: uppercase;
  margin-left: 6px;
}

.compact-list {
  list-style: none;
}

.compact-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  color: var(--ink2);
}

/* 10. 연락처 및 모집 안내 */
.contact-list {
  list-style: none;
}

.contact-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}

.contact-list b {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: .7rem;
  text-transform: uppercase;
  color: var(--muted);
}

.recruit-box {
  background: #fff;
  border: 1px solid var(--brand);
  padding: 30px;
}

.recruit-box h2 {
  font-family: "Noto Sans KR",system-ui,sans-serif;
  font-size: 2rem;
  margin: 12px 0;
}

.recruit-box p {
  color: var(--ink2);
  margin-bottom: 10px;
}

/* 11. 공통 푸터 */
footer {
  padding: 42px 0;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
}

.footer-logo {
  max-width: 170px;
  max-height: 70px;
}

.footer-grid>div:first-child p,.footer-meta p {
  font-size: .78rem;
  color: var(--muted);
  margin-top: 8px;
}

.footer-meta {
  text-align: right;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: .65s;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* 12. 태블릿 반응형 설정 */
@media(max-width:900px) {
  .hero-grid {
    grid-template-columns: 1fr 260px;
  }

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

  .approach-grid,.member-cards {
    grid-template-columns: 1fr 1fr;
  }
}

/* 13. 모바일 반응형 설정 */
@media(max-width:680px) {
  .wrap,.nav-wrap {
    width: min(100% - 32px,var(--max));
  }

  .menu-btn {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--paper);
    padding: 10px 20px 18px;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .hero {
    padding: 64px 0;
  }

  .hero-grid,.announcement-grid,.profile-split,.two-cols,.contact-grid,.pi-profile {
    grid-template-columns: 1fr;
  }

  .hero-mark {
    order: -1;
  }

  .hero-mark img {
    width: 180px;
    margin: 0;
  }

  .research-grid,.approach-grid,.member-cards,.stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 60px 0;
  }

  .section-heading {
    align-items: flex-start;
  }

  .section-heading .text-link {
    display: none;
  }

  .join-grid,.footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }

  .timeline>article,.project-list>article,.featured-pubs article {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .publication-list article {
    padding-left: 38px;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* 14. 모션 감소 접근성 설정 */
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .button,.research-card {
    transition: none;
  }
}

body {
  word-break: keep-all;
  overflow-wrap: break-word;
}

h1,h2,h3,.brand {
  font-weight: 700;
  letter-spacing: -.025em;
}

.nav-links a,.eyebrow,.button,.stats span,.timeline time,.project-list time,.featured-pubs time,.publication-list article:before,.tag {
  letter-spacing: .015em;
}

.hero h1,.page-hero h1 {
  font-weight: 800;
}

p,.hero-copy,.research-card p,.timeline p,.project-list p,.publication-list .authors {
  letter-spacing: -.005em;
}