:root {
  --ink: #111111;
  --muted: #68655f;
  --paper: #f6f2ea;
  --paper-deep: #ede6da;
  --white: #ffffff;
  --line: rgba(17,17,17,.14);
  --gold: #9b7d47;
  --max: 1200px;
  --shadow: 0 20px 60px rgba(24, 20, 14, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.75;
  word-break: keep-all;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  background: var(--ink);
  color: var(--white);
  padding: 10px 14px;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  width: min(calc(100% - 40px), var(--max));
  min-height: 86px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex: 0 0 auto;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-copy strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 15px;
  letter-spacing: .16em;
  white-space: nowrap;
}
.brand-copy small {
  margin-top: 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .23em;
  white-space: nowrap;
}
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.02em;
}
.site-nav a:hover { color: var(--gold); }
.menu-button {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 9px 13px;
  cursor: pointer;
}

.hero {
  min-height: 790px;
  display: grid;
  align-items: center;
  background:
    radial-gradient(circle at 82% 22%, rgba(155,125,71,.10), transparent 24%),
    linear-gradient(180deg, #fff 0%, #faf8f4 100%);
  overflow: hidden;
}
.hero-grid {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 70px;
  padding: 120px 0 110px;
}
.eyebrow {
  margin: 0 0 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--gold);
}
.hero h1, .section h2 {
  margin: 0;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-weight: 600;
  letter-spacing: -.055em;
}
.hero h1 {
  font-size: clamp(46px, 5.2vw, 78px);
  line-height: 1.22;
}
.hero-lead {
  max-width: 590px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.9;
}
.hero-actions { display: flex; gap: 12px; margin-top: 42px; }
.button {
  min-width: 150px;
  padding: 14px 22px;
  border: 1px solid var(--ink);
  text-align: center;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: .25s ease;
}
.button.primary { background: var(--ink); color: var(--white); }
.button.primary:hover { background: var(--gold); border-color: var(--gold); }
.button.secondary:hover { background: var(--ink); color: var(--white); }
.hero-mark { position: relative; }
.hero-mark::before {
  content: "";
  position: absolute;
  inset: 11% -4% 1% 11%;
  border: 1px solid rgba(155,125,71,.22);
}
.hero-mark img {
  position: relative;
  width: 100%;
  filter: contrast(1.05);
  mix-blend-mode: multiply;
}

.section { padding: 130px 0; }
.section > * {
  width: min(calc(100% - 40px), var(--max));
  margin-left: auto;
  margin-right: auto;
}
.section-light { background: var(--white); }
.section-paper { background: var(--paper); }
.section-dark { background: var(--ink); color: var(--white); }
.section-head { max-width: 850px; }
.section-head h2 {
  font-size: clamp(36px, 4vw, 58px);
  line-height: 1.34;
}
.section-head > p:last-child {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
}
.section-head.inverse .eyebrow { color: #d6bd8a; }

.about-grid {
  margin-top: 70px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 90px;
}
.intro {
  margin: 0;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: 24px;
  line-height: 1.9;
}
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.principles article {
  min-height: 250px;
  padding: 28px 24px 26px;
  border-right: 1px solid var(--line);
}
.principles article:last-child { border-right: 0; }
.principles span { color: var(--gold); font-family: Georgia, serif; }
.principles h3 { margin: 50px 0 16px; font-size: 24px; }
.principles p { margin: 0; color: var(--muted); font-size: 15px; }

.service-grid {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.service-card {
  min-height: 360px;
  padding: 36px 32px;
  border: 1px solid rgba(255,255,255,.22);
  display: flex;
  flex-direction: column;
}
.service-card .service-no {
  margin: 0;
  color: #d6bd8a;
  font-family: Georgia, serif;
}
.service-card h3 {
  margin: auto 0 20px;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: 28px;
}
.service-card p:last-child { margin: 0; color: rgba(255,255,255,.68); }

.book-grid {
  margin-top: 74px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.book-card {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 330px;
  background: var(--white);
  box-shadow: var(--shadow);
}
.book-cover {
  padding: 26px;
  color: var(--white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 330px;
}
.book-cover span { font-size: 13px; letter-spacing: .14em; }
.book-cover strong {
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: 25px;
  line-height: 1.52;
  font-weight: 600;
}
.book-cover.poetic { background: linear-gradient(145deg, #bca37a, #7e6b4e); }
.book-cover.essay { background: linear-gradient(145deg, #2d2c2a, #6f6a60); }
.book-cover.technical { background: linear-gradient(145deg, #1c2a36, #526d80); }
.book-cover.dictionary { background: linear-gradient(145deg, #584e3f, #a18d6b); }
.book-info { padding: 36px 32px; display: flex; flex-direction: column; justify-content: center; }
.tag {
  margin: 0 0 13px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
}
.book-info h3 {
  margin: 0;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: 27px;
  line-height: 1.45;
}
.book-info p:last-child { margin: 18px 0 0; color: var(--muted); }

.expertise-layout {
  margin-top: 70px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
}
.expertise-main h3 {
  margin: 0 0 24px;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: 31px;
}
.expertise-main p { margin: 0; color: var(--muted); font-size: 18px; }
.expertise-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.expertise-list li {
  padding: 20px 6px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}
.expertise-list li::before { content: "—"; margin-right: 14px; color: var(--gold); }

.quote-section {
  padding: 120px 20px;
  background: var(--paper-deep);
  text-align: center;
}
.quote-section blockquote {
  margin: 0 auto;
  max-width: 950px;
  font-family: "KoPub Batang", "Noto Serif KR", "Batang", serif;
  font-size: clamp(28px, 3.5vw, 48px);
  line-height: 1.65;
}

.contact-section {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 100px;
  align-items: start;
}
.contact-section > * { width: auto; margin: 0; }
.contact-copy h2 {
  font-size: clamp(38px, 4.4vw, 62px);
  line-height: 1.35;
}
.contact-copy > p:last-child {
  max-width: 650px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 17px;
}
.contact-card {
  border-top: 3px solid var(--ink);
  padding-top: 26px;
}
.contact-card dl { margin: 0; }
.contact-card dl > div {
  display: grid;
  grid-template-columns: 100px 1fr;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.contact-card dt { color: var(--muted); }
.contact-card dd { margin: 0; font-weight: 700; }
.contact-note { margin: 18px 0 0; color: var(--muted); font-size: 13px; }

.site-footer {
  background: var(--ink);
  color: var(--white);
  padding: 42px max(20px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
}
.site-footer strong { font-family: Georgia, serif; letter-spacing: .18em; }
.site-footer p { margin: 5px 0 0; color: rgba(255,255,255,.6); font-size: 13px; }

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-mark { max-width: 620px; margin: 0 auto; }
  .about-grid, .expertise-layout, .contact-section { grid-template-columns: 1fr; gap: 55px; }
  .principles { grid-template-columns: 1fr; }
  .principles article { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .principles h3 { margin-top: 22px; }
  .book-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .header-inner { min-height: 72px; }
  .brand img { width: 40px; height: 40px; }
  .brand-copy strong { font-size: 12px; }
  .brand-copy small { font-size: 9px; }
  .menu-button { display: inline-block; }
  .site-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 16px 22px; border-top: 1px solid var(--line); }
  .hero { min-height: auto; }
  .hero-grid { padding: 88px 0 75px; gap: 55px; }
  .hero h1 { font-size: 44px; }
  .hero-lead { font-size: 17px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .section { padding: 90px 0; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 280px; }
  .book-card { grid-template-columns: 150px 1fr; }
  .book-cover, .book-card { min-height: 300px; }
  .book-cover { padding: 20px; }
  .book-cover strong { font-size: 20px; }
  .book-info { padding: 28px 22px; }
  .book-info h3 { font-size: 23px; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 37px; }
  .book-card { grid-template-columns: 1fr; }
  .book-cover { min-height: 230px; }
  .contact-card dl > div { grid-template-columns: 1fr; gap: 6px; }
}