/* ─── TOKENS ─────────────────────────────────────────── */
:root {
  --blue:      #002D90;
  --blue-dark: #001E62;
  --black:     #231F20;
  --white:     #FFFFFF;
  --off-white: #F6F6F4;
  --gray-lt:   #EBEBEA;
  --gray-mid:  #9A9A96;

  --font-en: 'Montserrat', sans-serif;
  --font-kr: 'Pretendard', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;

  --max-w: 1240px;
  --pad-x: 64px;
  --pad-x-sm: 32px;
  --pad-x-xs: 20px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ─── RESET ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-kr);
  color: var(--black);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; }
button, input, select, textarea { font-family: inherit; }

/* ─── UTILITIES ──────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.section-tag {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
  display: inline-block;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--blue);
  margin-bottom: 48px;
}
.section-tag.light {
  color: rgba(255,255,255,0.55);
  border-color: rgba(255,255,255,0.25);
}

.section-headline {
  font-family: var(--font-en);
  font-size: clamp(36px, 4.5vw, 64px);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 64px;
}
.section-headline.light { color: var(--white); }

/* ─── LOGO MARK ──────────────────────────────────────── */
.logo-mark {
  width: 18px;
  height: 40px;
  flex-shrink: 0;
}
.logo-wordmark {
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.07em;
  line-height: 1.35;
}

/* ─── NAVBAR ─────────────────────────────────────────── */
#navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px var(--pad-x);
  transition: padding 0.35s var(--ease-out), background 0.35s, box-shadow 0.35s;
}

#navbar.scrolled {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.07);
  padding: 18px var(--pad-x);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  transition: color 0.35s;
}
#navbar.scrolled .nav-logo { color: var(--blue); }

.nav-links {
  display: flex;
  gap: 44px;
}
.nav-links a {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  transition: color 0.2s;
}
#navbar.scrolled .nav-links a { color: var(--black); }
.nav-links a:hover { color: var(--blue) !important; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  transition: background 0.35s;
}
#navbar.scrolled .nav-hamburger span { background: var(--black); }

/* ─── HERO ───────────────────────────────────────────── */
#hero {
  min-height: 100svh;
  background: var(--blue);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 140px var(--pad-x) 100px;
}

.hero-diagonal {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 55%, rgba(255,255,255,0.04) 55%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  margin-bottom: 28px;
}

.hero-headline {
  font-family: var(--font-en);
  font-size: clamp(22px, 3vw, 46px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 20px;
}

.hero-ko {
  font-family: var(--font-kr);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--white);
  margin-bottom: 24px;
}

.hero-sub {
  font-family: var(--font-kr);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  color: rgba(255,255,255,0.88);
  max-width: 440px;
  margin-bottom: 8px;
}
.hero-sub-en {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 440px;
  margin-bottom: 44px;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--white);
  padding: 18px 40px;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.88; }

.hero-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.hero-icon {
  width: 100px;
  height: 220px;
}

.hero-scroll {
  position: absolute;
  bottom: 44px;
  left: var(--pad-x);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  color: rgba(255,255,255,0.4);
}
.scroll-line {
  width: 1px;
  height: 52px;
  background: rgba(255,255,255,0.3);
  animation: scrollPulse 2s ease-in-out infinite;
}
.hero-scroll span {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  writing-mode: vertical-lr;
  transform: rotate(180deg);
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* ─── ABOUT ──────────────────────────────────────────── */
#about {
  padding: 120px 0;
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-headline {
  font-family: var(--font-kr);
  font-size: clamp(26px, 3vw, 44px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--blue);
  margin-bottom: 32px;
}

.about-kr {
  font-family: var(--font-kr);
  font-size: 16px;
  line-height: 2.0;
  color: var(--black);
  margin-bottom: 16px;
}
.about-en {
  font-family: var(--font-en);
  font-size: 12px;
  line-height: 1.8;
  color: var(--gray-mid);
  margin-bottom: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-bottom: 48px;
  border-top: 1px solid var(--gray-lt);
}

.stat-item {
  padding: 28px 0 0;
  border-right: 1px solid var(--gray-lt);
  padding-right: 24px;
  margin-right: -1px;
}
.stat-item:last-child { border-right: none; padding-right: 0; }
.stat-item:not(:first-child) { padding-left: 24px; }

.stat-number {
  font-family: var(--font-en);
  font-size: 60px;
  font-weight: 900;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--gray-mid);
  letter-spacing: 0.04em;
}

.about-quote {
  border-left: 3px solid var(--blue);
  padding-left: 20px;
}
.about-quote p {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--blue);
  font-style: italic;
}

/* ─── BOOKS: TRANSLATIONS ─────────────────────────────── */
.books-translations {
  padding: 120px 0;
  background: var(--off-white);
}

.books-grid-four {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
}

/* ─── BAND ────────────────────────────────────────────── */
.band {
  background: var(--blue);
  padding: 20px 0;
  overflow: hidden;
  white-space: nowrap;
}
.band-inner {
  display: inline-block;
  animation: marquee 28s linear infinite;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
}
.band-dot { margin: 0 16px; color: rgba(255,255,255,0.2); }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ─── BOOKS: ORIGINALS ────────────────────────────────── */
.books-originals {
  padding: 120px 0;
  background: var(--black);
}

.books-grid-two {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 60px;
}

/* ─── BOOK CARDS (standard) ──────────────────────────── */
.book-card {
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.book-card.visible { opacity: 1; transform: translateY(0); }

.book-cover-wrap {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.14);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.book-card:hover .book-cover-wrap {
  transform: translateY(-8px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.22);
}
.book-cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}
.book-card:hover .book-cover-wrap img { transform: scale(1.03); }

.book-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(0,45,144,0.08);
  padding: 5px 10px;
  margin-bottom: 10px;
}

.book-title-kr {
  font-family: var(--font-kr);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--black);
  margin-bottom: 4px;
}

.book-title-en {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  color: var(--gray-mid);
  margin-bottom: 4px;
}

.book-author {
  font-family: var(--font-en);
  font-size: 12px;
  color: var(--gray-mid);
}

/* ─── BOOK CARDS (feature / originals) ───────────────── */
.book-card-feature {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: start;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.book-card-feature.visible { opacity: 1; transform: translateY(0); }

.book-card-feature .book-cover-wrap {
  aspect-ratio: 3/4;
  margin-bottom: 0;
  flex-shrink: 0;
}
.book-card-feature:hover .book-cover-wrap {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}

.book-card-feature .book-badge { margin-bottom: 14px; }

.badge-original {
  color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.08);
}

.book-card-feature .book-title-kr {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}
.book-card-feature .book-title-en {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 6px;
}
.book-card-feature .book-author {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  margin-bottom: 20px;
}

.book-desc {
  font-family: var(--font-kr);
  font-size: 15px;
  line-height: 2.0;
  color: rgba(255,255,255,0.7);
  margin-bottom: 18px;
}
.book-desc-en {
  font-family: var(--font-en);
  font-size: 11px;
  line-height: 1.7;
  color: rgba(255,255,255,0.3);
  margin-bottom: 16px;
  margin-top: -10px;
}

.book-quote {
  font-family: var(--font-kr);
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.35);
  font-style: italic;
  border-left: 2px solid rgba(255,255,255,0.15);
  padding-left: 14px;
}

/* ─── FOUNDER ─────────────────────────────────────────── */
.founder-section {
  padding: 120px 0;
  background: var(--off-white);
}

.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.founder-image-col {
  position: relative;
}

.founder-img-wrap {
  aspect-ratio: 3/4;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.13);
}
.founder-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.founder-img-accent {
  position: absolute;
  bottom: -16px;
  left: -16px;
  width: 60%;
  height: 3px;
  background: var(--blue);
}
.founder-img-accent::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  height: 40px;
  background: var(--blue);
}

.founder-text-col {
  padding-top: 8px;
}

.founder-name {
  font-family: var(--font-en);
  font-size: clamp(32px, 3.5vw, 50px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--black);
  margin-bottom: 28px;
}
.founder-name-kr {
  font-family: var(--font-kr);
  font-size: 0.65em;
  font-weight: 700;
  color: var(--blue);
}

.founder-bio {
  font-family: var(--font-kr);
  font-size: 16px;
  line-height: 2.0;
  color: #3a3a3a;
  margin-bottom: 18px;
}
.founder-bio strong {
  color: var(--black);
  font-weight: 700;
}
.founder-bio-en {
  font-family: var(--font-en);
  font-size: 12px;
  line-height: 1.75;
  color: var(--gray-mid);
  margin-bottom: 18px;
  margin-top: -10px;
}

.founder-cta-row {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 36px;
}

.btn-blue {
  color: var(--white) !important;
  background: var(--blue) !important;
}
.btn-blue:hover { opacity: 0.88; }

.btn-ghost {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(0,45,144,0.3);
  padding-bottom: 2px;
  transition: border-color 0.2s;
}
.btn-ghost:hover { border-color: var(--blue); }

/* ─── SPEAKING ─────────────────────────────────────────── */
.speaking-section {
  padding: 120px 0 0;
  background: var(--blue);
  overflow: hidden;
}

.speaking-intro {
  margin-bottom: 52px;
}
.speaking-headline {
  font-family: var(--font-kr);
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 12px;
}
.speaking-headline-en {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 32px;
}

.btn-outline-white {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.5);
  padding: 14px 32px;
  white-space: nowrap;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: white;
}

/* Photo collage */
.speaking-collage {
  display: flex;
  gap: 8px;
  margin-bottom: 80px;
}
.collage-main {
  flex: 0 0 33.333%;
  height: 520px;
  overflow: hidden;
}
.collage-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform 0.6s var(--ease-out);
}
.collage-main:hover img { transform: scale(1.03); }

.collage-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 256px 256px;
  gap: 8px;
}
.collage-cell {
  overflow: hidden;
}
.collage-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease-out);
}
.collage-cell:hover img { transform: scale(1.04); }

/* Speaking topics */
.speaking-topics {
  padding-bottom: 80px;
}
.topics-intro {
  font-family: var(--font-kr);
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255,255,255,0.92);
  max-width: 600px;
  margin-bottom: 40px;
}

.topics-list { display: flex; flex-direction: column; gap: 2px; }

.topic-item {
  display: grid;
  grid-template-columns: 48px 1fr 200px;
  gap: 24px;
  padding: 28px 32px;
  background: rgba(0,0,0,0.18);
  border: 1px solid rgba(255,255,255,0.12);
  align-items: start;
  transition: background 0.2s, border-color 0.2s;
}
.topic-item:hover {
  background: rgba(0,0,0,0.28);
  border-color: rgba(255,255,255,0.22);
}

.topic-num {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 900;
  color: rgba(255,255,255,0.35);
  line-height: 1;
  padding-top: 4px;
}

.topic-body h3 {
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 10px;
}
.topic-body p {
  font-family: var(--font-kr);
  font-size: 14px;
  line-height: 1.9;
  color: rgba(255,255,255,0.88);
  margin-bottom: 6px;
}
.topic-body p.topic-en {
  font-family: var(--font-en);
  font-size: 11px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0;
}

.topic-audience {
  font-family: var(--font-en);
  font-size: 11px;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  text-align: right;
  padding-top: 4px;
}

/* University bar */
.uni-bar {
  background: #f0f2f8;
  padding: 44px var(--pad-x);
  margin: 0 calc(-1 * var(--pad-x));
}
.uni-label {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 28px;
}
.uni-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px 40px;
}
.uni-logo {
  height: 64px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  filter: none;
  opacity: 0.9;
}

/* ─── CONTACT ─────────────────────────────────────────── */
.contact-section {
  padding: 120px 0;
  background: var(--blue);
  position: relative;
  overflow: hidden;
}

.contact-decoration {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 38%;
  background: rgba(255,255,255,0.03);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
  pointer-events: none;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  position: relative;
  z-index: 2;
}

.contact-headline {
  font-family: var(--font-en);
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 24px 0 28px;
}

.contact-sub {
  font-family: var(--font-kr);
  font-size: 15px;
  line-height: 1.95;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
}

.contact-email {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,0.35);
  padding-bottom: 6px;
  margin-bottom: 32px;
  transition: border-color 0.2s;
}
.contact-email:hover { border-color: white; }

.social-row {
  display: flex;
  gap: 28px;
}
.social-link {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}
.social-link:hover { color: white; }

/* ─── FORM ────────────────────────────────────────────── */
.contact-form { display: flex; flex-direction: column; gap: 14px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--white);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  border-radius: 0;
  appearance: none;
  -webkit-appearance: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(255,255,255,0.35); }
.contact-form select { color: rgba(255,255,255,0.35); cursor: pointer; }
.contact-form select option { background: var(--blue-dark); color: white; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: rgba(255,255,255,0.55);
  background: rgba(255,255,255,0.11);
}
.contact-form textarea { resize: vertical; min-height: 150px; }

.btn-submit {
  padding: 19px 40px;
  background: var(--white);
  color: var(--blue);
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
  align-self: flex-start;
}
.btn-submit:hover { opacity: 0.88; }
.btn-submit.sending { opacity: 0.6; pointer-events: none; }

/* ─── FOOTER ──────────────────────────────────────────── */
footer {
  background: var(--black);
  padding: 44px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  flex-shrink: 0;
}
.footer-logo .logo-mark { width: 14px; height: 32px; }
.footer-logo .logo-wordmark { font-size: 9.5px; }

.footer-center p {
  font-family: var(--font-en);
  font-size: 11.5px;
  color: rgba(255,255,255,0.35);
  line-height: 1.65;
}

.footer-nav { display: flex; gap: 32px; }
.footer-nav a {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  transition: color 0.2s;
}
.footer-nav a:hover { color: white; }

/* ─── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 1024px) {
  :root { --pad-x: var(--pad-x-sm); }

  .hero-inner { grid-template-columns: 1fr; }
  .hero-icon-wrap { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 52px; }
  .books-grid-four { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .books-grid-two { grid-template-columns: 1fr; gap: 52px; }

  .book-card-feature {
    grid-template-columns: 160px 1fr;
    gap: 24px;
  }

  .founder-grid { grid-template-columns: 1fr; gap: 48px; }
  .founder-img-wrap { max-width: 380px; }

  .speaking-headline { font-size: clamp(32px, 6vw, 52px); }
  .speaking-collage { flex-direction: column; }
  .collage-main { flex: none; width: 100%; height: 300px; }
  .collage-grid { grid-template-rows: 180px 180px; }

  .topic-item { grid-template-columns: 40px 1fr; }
  .topic-audience { display: none; }

  .contact-inner { grid-template-columns: 1fr; gap: 52px; }
  .footer-inner { flex-wrap: wrap; }
}

@media (max-width: 640px) {
  :root { --pad-x: var(--pad-x-xs); }

  #navbar { padding-left: var(--pad-x-xs); padding-right: var(--pad-x-xs); }
  #navbar.scrolled { padding-left: var(--pad-x-xs); padding-right: var(--pad-x-xs); }

  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,45,144,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    z-index: 800;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    font-size: 22px;
    color: rgba(255,255,255,0.85) !important;
    letter-spacing: 0.08em;
  }
  #navbar.scrolled .nav-links a { color: rgba(255,255,255,0.85) !important; }
  .nav-hamburger { display: flex; z-index: 1000; position: relative; }

  .hero-headline { font-size: clamp(18px, 5.5vw, 36px); }
  #hero { padding: 110px var(--pad-x-xs) 80px; }

  .section-headline { margin-bottom: 40px; }
  .books-grid-four { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .book-title-kr { font-size: 13px; }

  .book-card-feature {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .book-card-feature .book-cover-wrap { max-width: 200px; }
  .book-card-feature .book-title-kr { font-size: 18px; }

  .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .stat-number { font-size: 40px; }
  .stat-item { padding-right: 12px; }
  .stat-item:not(:first-child) { padding-left: 12px; }

  .speaking-collage { flex-direction: column; }
  .collage-main { flex: none; width: 100%; height: 280px; }
  .collage-grid { grid-template-rows: 160px 160px; }
  .topic-item { grid-template-columns: 36px 1fr; padding: 20px 16px; }
  .topic-audience { display: none; }
  .founder-grid { grid-template-columns: 1fr; }
  .founder-img-wrap { max-width: 300px; }
  .founder-cta-row { flex-direction: column; align-items: flex-start; gap: 14px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-headline { font-size: clamp(28px, 10vw, 44px); }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-nav { gap: 20px; }
}