@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css");

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #181818;
  --muted: #686868;
  --accent: #c96f4a;
  --line: rgba(24, 24, 24, 0.13);
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* 고정 헤더에 섹션 제목이 가려지지 않도록 설정 */
#home,
#about,
#publication {
  scroll-margin-top: 88px;
}

/* About, Publication 공통 영역 */
.single-page-section {
  padding: 100px 0;
}

.single-page-section + .single-page-section {
  border-top: 1px solid var(--line);
}

.section-heading {
  margin-bottom: 60px;
}

.section-heading h2 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(40px, 5vw, 68px);
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.section-heading > p:last-child {
  max-width: 700px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.content-grid h3 {
  margin-top: 0;
  font-size: 30px;
}

.publication-section {
  padding-bottom: 120px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  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 28px rgba(0,0,0,.04);
}

.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.logo {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .16em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links a {
  position: relative;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .2s ease;
}

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

.menu-button {
  display: none;
  border: 0;
  background: none;
  font-size: 24px;
  cursor: pointer;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

.hero {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px;
  align-items: start;
  padding: 55px max(28px, calc((100vw - var(--max-width)) / 2 + 28px)) 55px;
  background: #f3f3f3;
  width: 100vw;
  margin-left: calc(50% - 50vw);
}

.hero-text {
  padding-top: 4px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: "Pretendard";
  line-height: 1.15;
}

.hero h1 {
  margin: 0 0 28px;
  font-size: clamp(48px, 6vw, 82px);
  letter-spacing: -.035em;
}

.hero-copy {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.social-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
}

.social-label {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: none;
}

.social-divider {
  width: 1px;
  height: 18px;
  background: #b8b8b8;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #aaaaaa;
  font-size: 17px;
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}

.social-icon:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.portrait-frame {
  position: relative;
  width: 100%;
  max-width: 280px;
  justify-self: start;
}

.portrait-frame::before {
  display: none;
}

.portrait-frame img {
  position: relative;
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 0;
  filter: none;
}

.page-hero {
  padding: 100px 0 58px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(46px, 6vw, 76px);
}

.page-hero p {
  max-width: 700px;
  color: var(--muted);
  font-size: 18px;
}

.content-section {
  padding: 70px 0 100px;
}

.content-grid {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 70px;
}

.content-grid h2 {
  margin-top: 0;
  font-size: 35px;
}

.content-grid p {
  color: var(--muted);
}

.tag-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.tag {
  padding: 8px 13px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
}

/* PUBLICATION */
.publication-list {
  display: grid;
  gap: 22px;
}

.publication-card {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 26px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.publication-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,0,0,.06);
}

.pub-year {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: .08em;
}

.publication-card h3 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.4;
}

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

.pub-meta {
  margin-top: 12px !important;
  font-size: 14px;
}

.pub-authors {
  margin: 0;
  color: var(--muted);
}

.pub-status {
  display: inline-block;
  margin-top: 16px;
  padding: 5px 11px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.pdf-link {
  display: inline-block;
  margin-left: 7px;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  white-space: nowrap;
  vertical-align: middle;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.pdf-link:hover {
  color: #ffffff;
  background-color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

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

.footer-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 30px 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

/* ABOUT */
.about-block {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 70px;
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.about-block:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.about-title h3 {
  margin: 0;
  font-size: 34px;
}

.about-content p {
  margin-top: 0;
  color: var(--muted);
}

/* PROJECTS */
.project-list {
  display: grid;
  gap: 28px;
}

.project-item {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.project-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.project-header {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: flex-start;
}

.project-header h4 {
  max-width: 650px;
  margin: 0;
  font-size: 21px;
  line-height: 1.45;
}

.project-period {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

.project-korean {
  margin: 8px 0 12px !important;
  font-size: 14px;
}

/* LANGUAGES */
.language-list {
  display: grid;
  gap: 36px;
}

.language-item h4 {
  margin: 0 0 14px;
  font-size: 22px;
}

.language-test {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.language-test span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 14px;
}

.language-score {
  flex-shrink: 0;
  color: var(--muted);
  text-align: right;
}

.hero-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
}

.hero-contact i {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 16px;
}

.hero-contact-address {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
}

@media (max-width: 820px) {
  .menu-button {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 76px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 22px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: 0 18px 50px rgba(0,0,0,.08);
  }

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

  .hero {
    grid-template-columns: 1fr;
    gap: 35px;
    padding: 45px 20px;
  }

  .portrait-frame {
    justify-self: center;
    max-width: 260px;
  }

  .hero-text {
    padding-top: 0;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .publication-card {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .single-page-section {
    padding: 75px 0;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  .about-block {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 45px 0;
  }

  .project-header {
    flex-direction: column;
    gap: 6px;
  }

  .language-test {
    flex-direction: column;
    gap: 4px;
  }

  .language-score {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .nav-wrap,
  main,
  .footer-wrap {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .social-row {
    align-items: flex-start;
  }

  .social-label {
    flex-basis: 100%;
  }

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

  .single-page-section {
    padding: 75px 0;
  }

  .section-heading {
    margin-bottom: 40px;
  }
}