:root {
  --bg: #f6efe5;
  --bg-soft: #fbf6ef;
  --panel: #fffaf2;
  --panel-strong: #f2e8db;
  --line: #d8ccbc;
  --line-strong: #c5b5a0;
  --ink: #2f2923;
  --muted: #655c53;
  --accent: #856853;
  --accent-soft: rgba(133, 104, 83, 0.12);
  --shadow: 0 16px 32px rgba(84, 66, 50, 0.06);
  --radius-lg: 28px;
  --radius-md: 20px;
  --max-width: 900px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans KR", "Noto Sans SC", sans-serif;
  line-height: 1.7;
  background:
    linear-gradient(180deg, #fbf7f0 0%, var(--bg) 36%, #f3eadf 100%),
    repeating-linear-gradient(
      90deg,
      transparent 0 95px,
      rgba(133, 104, 83, 0.028) 95px 96px
    );
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.page {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding-bottom: 2rem;
}

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 0.95rem 1.1rem;
  background: rgba(255, 250, 242, 0.94);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-photo-frame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  padding: 0.14rem;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, var(--panel), var(--panel-strong));
  overflow: hidden;
}

.brand-photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: 50% 58%;
}

.brand-name {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-nav a {
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.28rem;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  position: relative;
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel);
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  width: 1rem;
  height: 2px;
  background: var(--ink);
  border-radius: 999px;
  transition: transform 160ms ease;
}

.nav-toggle span:first-child {
  transform: translateY(-4px);
}

.nav-toggle span:last-child {
  transform: translateY(4px);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: rotate(-45deg);
}

main {
  counter-reset: section;
}

.section {
  position: relative;
  padding: 4.25rem 0;
}

.section + .section {
  border-top: 1px solid rgba(197, 181, 160, 0.65);
}

.hero {
  display: grid;
  gap: 1rem;
  padding-top: 3.4rem;
}

.hero-profile-card {
  display: grid;
  grid-template-columns: minmax(220px, 270px) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.hero-photo-column {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 0.2rem;
}

.profile-photo-frame {
  width: min(100%, 260px);
  aspect-ratio: 1;
  padding: 0.75rem;
  border-radius: 50%;
  border: 1px solid rgba(197, 181, 160, 0.9);
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.96), rgba(242, 232, 219, 0.94));
  box-shadow: 0 20px 36px rgba(84, 66, 50, 0.1);
}

.profile-photo {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: 50% 58%;
}

.hero-copy {
  min-width: 0;
}

.hero-main,
.info-card,
.content-card,
.publication-item,
.contact-card {
  position: relative;
  overflow: hidden;
  padding: 1.55rem;
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.98), rgba(252, 246, 237, 0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.hero-main {
  padding: 2rem;
  border-radius: var(--radius-lg);
}

.hero-main::before,
.info-card::before,
.content-card::before,
.publication-item::before,
.contact-card::before {
  content: "";
  position: absolute;
  inset: 0.65rem;
  border: 1px solid rgba(197, 181, 160, 0.45);
  border-radius: inherit;
  pointer-events: none;
}

.hero-side,
.publication-list,
.content-grid,
.two-column-grid,
.projects-grid,
.publication-layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: currentColor;
}

.hero h1,
.section-heading h2,
.info-card h2,
.contact-card h2,
.content-card h3,
.publication-item h3,
.timeline-item h4 {
  margin: 0;
  font-family: "Newsreader", "Noto Serif KR", "Noto Serif SC", serif;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.hero h1 {
  max-width: none;
  font-size: clamp(3.2rem, 6vw, 5.8rem);
  line-height: 0.98;
}

.section-heading {
  position: relative;
  max-width: 760px;
  margin-bottom: 1.8rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
}

.section-heading::after {
  counter-increment: section;
  content: counter(section, decimal-leading-zero);
  position: absolute;
  right: 0;
  top: -0.25rem;
  color: rgba(133, 104, 83, 0.16);
  font-family: "Newsreader", "Noto Serif KR", "Noto Serif SC", serif;
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
}

.section-heading h2,
.contact-card h2 {
  font-size: clamp(2.2rem, 4vw, 3.55rem);
  line-height: 1.04;
}

.info-card h2 {
  font-size: 2rem;
  line-height: 1.08;
}

.content-card h3,
.publication-item h3 {
  margin-bottom: 0.8rem;
  font-size: 1.55rem;
  line-height: 1.18;
}

.timeline-item h4 {
  font-size: 1.1rem;
  line-height: 1.25;
}

.hero-text,
.section-heading p,
.content-card p,
.info-card p,
.publication-meta,
.contact-card p,
.detail-list li,
.plain-list li,
.timeline-item p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-text {
  max-width: 60ch;
  margin-top: 1.2rem;
}

.hero-summary {
  max-width: 60ch;
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(197, 181, 160, 0.65);
}

.hero-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.85rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 0.94rem;
  font-weight: 700;
  transition:
    background-color 160ms ease,
    color 160ms ease,
    border-color 160ms ease;
}

.button-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fffaf2;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #443b33;
  border-color: #443b33;
}

.button-secondary {
  background: rgba(255, 250, 242, 0.9);
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: var(--panel-strong);
}

.card-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.85rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.card-label::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
}

.plain-list,
.detail-list,
.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-list {
  display: grid;
  gap: 0.55rem;
}

.detail-list {
  display: grid;
  gap: 0.85rem;
}

.detail-list li {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(216, 204, 188, 0.9);
}

.detail-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.timeline {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.timeline-item {
  position: relative;
  padding-left: 1.1rem;
  border-left: 2px solid var(--line-strong);
}

.timeline-label {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.publication-layout {
  align-items: start;
}

.publication-list {
  display: grid;
  gap: 1rem;
}

.publication-item {
  padding-left: 1.7rem;
  border-left: 4px solid var(--accent);
}

.publication-top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.95rem;
}

.publication-year,
.publication-type {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  font-size: 0.84rem;
  font-weight: 700;
}

.publication-source {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(133, 104, 83, 0.3);
  background: rgba(255, 250, 242, 0.92);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.publication-title-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(133, 104, 83, 0.45);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  transition:
    color 160ms ease,
    text-decoration-color 160ms ease;
}

.publication-title-link:hover,
.publication-title-link:focus-visible {
  color: var(--accent);
  text-decoration-color: currentColor;
}

.publication-meta {
  margin-top: 0.5rem;
}

.original-title {
  margin: 0.15rem 0 0.8rem;
  color: var(--ink);
  font-family: "Noto Serif KR", "Noto Serif SC", "Newsreader", serif;
  font-size: 0.95rem;
}

.inline-original-title {
  color: var(--ink);
  font-family: "Noto Serif KR", "Noto Serif SC", "Newsreader", serif;
}

.inline-button {
  margin-top: 1rem;
}

.publication-note p {
  max-width: 58ch;
}

.contact-card {
  padding: 2rem;
  text-align: center;
}

.contact-card .hero-actions {
  justify-content: center;
}

.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 0 0 2.5rem;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

:focus-visible {
  outline: 2px solid rgba(133, 104, 83, 0.45);
  outline-offset: 4px;
}

@media (max-width: 720px) {
  .page {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
    border-radius: 18px;
  }

  .nav-toggle {
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    display: inline-flex;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding-top: 0.8rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .section {
    padding: 3.4rem 0;
  }

  .hero-profile-card {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-photo-column {
    justify-content: center;
  }

  .profile-photo-frame {
    width: min(15.5rem, 72vw);
  }

  .section-heading::after {
    position: static;
    display: block;
    margin-top: 0.5rem;
    font-size: 2.4rem;
  }

  .site-footer {
    flex-direction: column;
    justify-content: center;
  }
}