/* =========================================================
   University of Seoul — Global Stylesheet
   Design: Academic Prestige · Navy + Gold + White
   Fonts: EB Garamond (headings) + Crimson Text (body)
   ========================================================= */

/* ---------- CSS Variables ---------- */
:root {
  --navy:        #0d2149;
  --navy-dark:   #081530;
  --navy-mid:    #163266;
  --navy-light:  #1e4080;
  --gold:        #c8962a;
  --gold-light:  #d9aa45;
  --gold-pale:   #f5edda;
  --white:       #ffffff;
  --off-white:   #f9f8f6;
  --gray-100:    #f3f4f6;
  --gray-200:    #e5e7eb;
  --gray-400:    #9ca3af;
  --gray-600:    #4b5563;
  --gray-800:    #1f2937;
  --text-dark:   #0d1f3c;
  --text-body:   #374151;
  --text-muted:  #6b7280;

  --font-heading: 'EB Garamond', Georgia, serif;
  --font-body:    'Crimson Text', Georgia, serif;
  --font-ui:      'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --nav-h:        76px;
  --max-w:        1280px;
  --radius:       4px;
  --radius-lg:    8px;

  --shadow-sm:    0 1px 4px rgba(13,33,73,0.08);
  --shadow-md:    0 4px 20px rgba(13,33,73,0.12);
  --shadow-lg:    0 12px 40px rgba(13,33,73,0.18);

  --transition:   all 0.22s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text-body);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-dark);
  line-height: 1.2;
  font-weight: 600;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; }
p { font-size: 1.1rem; line-height: 1.75; }

.section-label {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 0.6rem;
}
.section-title {
  font-family: var(--font-heading);
  color: var(--text-dark);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.25;
}
.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-top: 0.75rem;
  max-width: 540px;
}

/* ---------- Layout Utilities ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.section { padding: 90px 0; }
.section-header { margin-bottom: 3rem; }
.section-header.centered { text-align: center; }
.section-header.centered .section-desc { margin: 0.75rem auto 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gold-line {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gold);
  margin-top: 1rem;
}
.gold-line.centered { margin: 1rem auto 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gold);
  color: var(--navy-dark);
}
.btn-primary:hover { background: var(--gold-light); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline-white {
  border: 1.5px solid rgba(255,255,255,0.7);
  color: var(--white);
}
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn-outline-navy {
  border: 1.5px solid var(--navy);
  color: var(--navy);
}
.btn-outline-navy:hover { background: var(--navy); color: var(--white); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-navy:hover { background: var(--navy-mid); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-sm { padding: 0.5rem 1.2rem; font-size: 0.82rem; }
.btn-lg { padding: 1rem 2.25rem; font-size: 0.95rem; }

/* ---------- Navigation ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  height: var(--nav-h);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo-emblem {
  width: 44px;
  height: 44px;
  background: var(--navy);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.nav-logo-emblem::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(200,150,42,0.35) 100%);
}
.nav-logo-emblem svg { width: 28px; height: 28px; fill: var(--gold); position: relative; z-index: 1; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1; }
.nav-logo-kr {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.02em;
}
.nav-logo-en {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  transition: var(--transition);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { color: var(--navy); background: var(--gray-100); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.lang-toggle {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gray-600);
  border: 1px solid var(--gray-200);
  border-radius: 3px;
  padding: 0.35rem 0.7rem;
  transition: var(--transition);
  letter-spacing: 0.05em;
}
.lang-toggle:hover { border-color: var(--navy); color: var(--navy); }
.btn-portal {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--navy);
  color: var(--white);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
  transition: var(--transition);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.btn-portal:hover { background: var(--navy-mid); }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  background: var(--navy-dark);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(160deg, #081530 0%, #0d2149 45%, #163266 100%);
}
.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,150,42,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,150,42,0.08) 1px, transparent 1px);
  background-size: 64px 64px;
}
.hero-accent {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  background: linear-gradient(135deg, transparent 30%, rgba(200,150,42,0.06) 100%);
  clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 0% 100%);
}
.hero-pillars {
  position: absolute;
  bottom: 0;
  right: 6%;
  display: flex;
  gap: 14px;
  align-items: flex-end;
  opacity: 0.07;
}
.hero-pillars span {
  display: block;
  background: var(--white);
  border-radius: 3px 3px 0 0;
}
.hero-pillars span:nth-child(1) { width: 28px; height: 260px; }
.hero-pillars span:nth-child(2) { width: 28px; height: 380px; }
.hero-pillars span:nth-child(3) { width: 28px; height: 320px; }
.hero-pillars span:nth-child(4) { width: 28px; height: 430px; }
.hero-pillars span:nth-child(5) { width: 28px; height: 290px; }
.hero-pillars span:nth-child(6) { width: 28px; height: 360px; }
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}
.hero-content { max-width: 700px; padding: 5rem 0; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(200,150,42,0.15);
  border: 1px solid rgba(200,150,42,0.35);
  color: var(--gold-light);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  border-radius: 2px;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--font-heading);
  color: var(--white);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.3rem;
}
.hero-title .hero-title-kr {
  display: block;
  font-size: 0.55em;
  color: rgba(255,255,255,0.55);
  font-weight: 400;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}
.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  color: rgba(255,255,255,0.72);
  line-height: 1.6;
  margin-bottom: 2.5rem;
  max-width: 540px;
}
.hero-divider {
  width: 56px;
  height: 3px;
  background: var(--gold);
  margin-bottom: 2rem;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3.5rem;
}
.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat {}
.hero-stat-num {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--gold-light);
  line-height: 1;
}
.hero-stat-label {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.06em;
  margin-top: 4px;
  text-transform: uppercase;
}

/* ---------- Announcement Bar ---------- */
.announcement-bar {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  padding: 0.6rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}
.announcement-bar a { color: var(--gold-light); text-decoration: underline; text-underline-offset: 2px; }
.announcement-bar .ann-close { margin-left: auto; cursor: pointer; opacity: 0.6; }
.announcement-bar .ann-close:hover { opacity: 1; }

/* ---------- Stats / Rankings ---------- */
.stats-section {
  background: var(--navy);
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,150,42,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,150,42,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.stats-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  padding: 2rem;
  border-right: 1px solid rgba(255,255,255,0.1);
  text-align: center;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--gold-light);
  line-height: 1;
  display: block;
}
.stat-unit {
  font-family: var(--font-ui);
  font-size: 1rem;
  color: var(--gold-light);
}
.stat-label {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
  display: block;
}
.stat-desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.35);
  margin-top: 0.25rem;
}

/* ---------- Cards ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(13,33,73,0.15);
}
.card-img {
  height: 200px;
  background: var(--navy);
  position: relative;
  overflow: hidden;
}
.card-body { padding: 1.5rem; }
.card-tag {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 0.5rem;
}
.card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 0.6rem;
}
.card-text { font-size: 0.95rem; color: var(--text-muted); }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--navy);
  margin-top: 1rem;
  transition: var(--transition);
  letter-spacing: 0.03em;
}
.card-link:hover { color: var(--gold); gap: 0.5rem; }
.card-link svg { width: 14px; height: 14px; }

/* Research card visuals */
.research-card .card-img { height: 140px; }
.research-icon {
  width: 56px;
  height: 56px;
  background: rgba(200,150,42,0.12);
  border: 1.5px solid rgba(200,150,42,0.3);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.research-icon svg { width: 28px; height: 28px; fill: var(--gold); }

/* College cards */
.college-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.college-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--navy);
  transition: var(--transition);
}
.college-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: transparent; }
.college-card:hover::before { background: var(--gold); }
.college-num {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--gray-400);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.college-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.4rem;
}
.college-name-en { font-size: 0.82rem; color: var(--text-muted); font-family: var(--font-ui); }
.college-programs {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--gray-400);
  margin-top: 0.75rem;
}

/* News cards */
.news-card .card-img { height: 180px; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
}
.news-date {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--gray-400);
  letter-spacing: 0.05em;
}

/* Event cards */
.event-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1.25rem;
  transition: var(--transition);
  align-items: flex-start;
}
.event-card:hover { box-shadow: var(--shadow-md); border-color: rgba(13,33,73,0.15); }
.event-date-box {
  flex-shrink: 0;
  width: 54px;
  text-align: center;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  padding: 0.5rem 0;
}
.event-date-day {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-light);
}
.event-date-mon {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-top: 2px;
}
.event-info {}
.event-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.3rem;
}
.event-type {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.event-loc {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Section: Card Visuals (CSS only) ---------- */
.vis-lab {
  background: linear-gradient(135deg, #0d1f3c 0%, #1a3a6e 60%, #0f2a52 100%);
  position: relative;
}
.vis-lab::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(200,150,42,0.15) 1px, transparent 1px);
  background-size: 18px 18px;
}
.vis-engineering {
  background: linear-gradient(135deg, #1e3a5f 0%, #2d5a8e 100%);
}
.vis-bio {
  background: linear-gradient(135deg, #0d3349 0%, #1a5c6e 100%);
}
.vis-ai {
  background: linear-gradient(135deg, #1a0d49 0%, #2a1a6e 60%, #0d2149 100%);
}
.vis-env {
  background: linear-gradient(135deg, #0d2e1a 0%, #1a5c2a 100%);
}
.vis-data {
  background: linear-gradient(135deg, #2e1a0d 0%, #5c3a1a 100%);
}
.vis-campus {
  background: linear-gradient(135deg, #1a1a2e 0%, #2a2a4e 100%);
}
.vis-news-1 { background: linear-gradient(135deg, #0d2149 0%, #1e3a6e 100%); }
.vis-news-2 { background: linear-gradient(135deg, #0d3349 0%, #1e5c6e 100%); }
.vis-news-3 { background: linear-gradient(135deg, #1a0d49 0%, #2e1a6e 100%); }

/* ---------- Campus Life Section ---------- */
.campus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 220px);
  gap: 1rem;
}
.campus-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}
.campus-item:first-child {
  grid-row: span 2;
}
.campus-vis {
  width: 100%;
  height: 100%;
  transition: transform 0.35s ease;
}
.campus-item:hover .campus-vis { transform: scale(1.03); }
.campus-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,33,73,0.85) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
}
.campus-overlay-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--white);
  font-weight: 600;
}

/* ---------- Quote / Highlight Banner ---------- */
.highlight-banner {
  background: var(--gold-pale);
  border-left: 4px solid var(--gold);
  padding: 2rem 2.5rem;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: 2rem 0;
}
.highlight-banner blockquote {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-style: italic;
  color: var(--text-dark);
  line-height: 1.5;
}
.highlight-banner cite {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-style: normal;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

/* ---------- International Section ---------- */
.intl-section { background: var(--off-white); }
.intl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.intl-visual {
  background: var(--navy);
  border-radius: var(--radius-lg);
  height: 400px;
  position: relative;
  overflow: hidden;
}
.intl-visual-inner {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy-mid) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.globe-svg { width: 180px; height: 180px; opacity: 0.5; }
.intl-info-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}
.intl-info-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}
.intl-info-icon {
  width: 36px;
  height: 36px;
  background: var(--navy);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.intl-info-icon svg { width: 18px; height: 18px; fill: var(--gold); }
.intl-info-text h4 { font-size: 0.9rem; color: var(--text-dark); margin-bottom: 0.2rem; }
.intl-info-text p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }

/* ---------- Notice / Admission Policy Box ---------- */
.policy-box {
  background: var(--gold-pale);
  border: 1px solid rgba(200,150,42,0.3);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 1.5rem 0;
}
.policy-box h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.policy-box p { font-size: 0.92rem; color: var(--text-body); line-height: 1.65; }

/* ---------- Page Hero (sub-pages) ---------- */
.page-hero {
  background: var(--navy);
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,150,42,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,150,42,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-hero-inner { position: relative; z-index: 1; }
.page-hero-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 0.75rem;
}
.page-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--white);
  font-weight: 700;
  line-height: 1.15;
}
.page-hero .sub {
  color: rgba(255,255,255,0.6);
  font-size: 1.1rem;
  margin-top: 0.75rem;
}
.page-hero-kr {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: rgba(255,255,255,0.4);
  margin-top: 0.25rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 1.25rem;
}
.breadcrumb a { color: rgba(255,255,255,0.55); transition: var(--transition); }
.breadcrumb a:hover { color: var(--gold-light); }
.breadcrumb-sep { opacity: 0.4; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  gap: 0;
  margin-bottom: 2.5rem;
}
.tab-btn {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.9rem 1.5rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
  cursor: pointer;
}
.tab-btn.active { color: var(--navy); border-bottom-color: var(--navy); }
.tab-btn:hover { color: var(--navy); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---------- Requirements Table ---------- */
.req-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.req-table th {
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  text-align: left;
}
.req-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--gray-200);
  font-family: var(--font-ui);
  color: var(--text-body);
}
.req-table tr:hover td { background: var(--gray-100); }
.tag-required {
  background: rgba(13,33,73,0.08);
  color: var(--navy);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  letter-spacing: 0.05em;
}

/* ---------- Service Cards ---------- */
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-icon {
  width: 60px;
  height: 60px;
  background: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
}
.service-icon svg { width: 28px; height: 28px; fill: var(--gold); }
.service-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.service-card p { font-size: 0.88rem; color: var(--text-muted); }

/* ---------- Alumni ---------- */
.alumni-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  transition: var(--transition);
}
.alumni-card:hover { box-shadow: var(--shadow-md); }
.alumni-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--navy);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--gold);
}
.alumni-name { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.2rem; }
.alumni-year { font-family: var(--font-ui); font-size: 0.78rem; color: var(--gold); letter-spacing: 0.08em; }
.alumni-role { font-size: 0.88rem; color: var(--text-muted); margin-top: 0.4rem; }

/* ---------- Portal / Login ---------- */
.portal-page {
  min-height: 100vh;
  background: linear-gradient(160deg, var(--navy-dark) 0%, var(--navy) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.portal-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 3rem;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}
.portal-logo {
  text-align: center;
  margin-bottom: 2rem;
}
.portal-logo .emblem {
  width: 56px;
  height: 56px;
  background: var(--navy);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
}
.portal-logo .emblem svg { width: 32px; height: 32px; fill: var(--gold); }
.portal-logo h2 { font-size: 1.2rem; color: var(--navy); }
.portal-logo p { font-family: var(--font-ui); font-size: 0.78rem; color: var(--text-muted); margin-top: 0.25rem; }
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.04em;
  margin-bottom: 0.45rem;
}
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--text-dark);
  transition: var(--transition);
  outline: none;
}
.form-input:focus { border-color: var(--navy); box-shadow: 0 0 0 3px rgba(13,33,73,0.08); }
.portal-notice {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 1.5rem;
  line-height: 1.5;
}

/* ---------- Map Section ---------- */
.map-visual {
  background: var(--navy-dark);
  border-radius: var(--radius-lg);
  padding: 3rem;
  position: relative;
  overflow: hidden;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,150,42,0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,150,42,0.12) 1px, transparent 1px);
  background-size: 32px 32px;
}
.map-buildings {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
  justify-content: center;
}
.map-building {
  background: rgba(200,150,42,0.2);
  border: 1px solid rgba(200,150,42,0.4);
  border-radius: 2px 2px 0 0;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 0.5rem;
}
.map-building-label {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  color: rgba(255,255,255,0.7);
  white-space: nowrap;
  letter-spacing: 0.05em;
  text-align: center;
}
.map-legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}
.map-legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-body);
}
.map-dot {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}
.dot-academic { background: var(--navy); }
.dot-research { background: var(--gold); }
.dot-housing  { background: #2d8a5f; }
.dot-athletics { background: #8a2d2d; }
.dot-library  { background: #5c4a1a; }
.dot-admin    { background: #4a1a5c; }

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.65);
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
.footer-emblem {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(200,150,42,0.3);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-emblem svg { width: 24px; height: 24px; fill: var(--gold); }
.footer-logo-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--white);
  font-weight: 600;
}
.footer-logo-tagline {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}
.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 280px;
}
.footer-address {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  margin-top: 1rem;
  line-height: 1.6;
}
.footer-col h4 {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-ui);
  font-size: 0.74rem;
  color: rgba(255,255,255,0.3);
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-bottom-links { display: flex; gap: 1.5rem; }
.footer-bottom-links a { color: rgba(255,255,255,0.35); transition: var(--transition); }
.footer-bottom-links a:hover { color: var(--white); }

/* ---------- Divider / Separator ---------- */
.divider { height: 1px; background: var(--gray-200); margin: 0; }
.section-divider { width: 64px; height: 3px; background: var(--gold); margin: 1rem 0; }

/* ---------- Alternate section BG ---------- */
.bg-off-white { background: var(--off-white); }
.bg-navy { background: var(--navy); }
.bg-gray { background: var(--gray-100); }

/* ---------- Scroll fade-in animation ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 0.5rem 0.6rem; font-size: 0.78rem; }
  .footer-inner { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-inner .footer-col:last-child { grid-column: span 1; }
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-top: 1px solid rgba(255,255,255,0.1); }
  .stat-item:nth-child(4) { border-top: 1px solid rgba(255,255,255,0.1); }
  .intl-grid { grid-template-columns: 1fr; }
  .intl-visual { height: 250px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .campus-grid { grid-template-rows: repeat(3, 200px); }
  .campus-grid .campus-item:first-child { grid-row: span 1; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .section { padding: 60px 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero-content { padding: 3rem 0; }
  .hero-stats { gap: 1.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .campus-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .campus-item { height: 200px; }
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .map-legend { grid-template-columns: repeat(2, 1fr); }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: max-content; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { flex-direction: column; gap: 1rem; }
}

/* ---------- Mobile Nav ---------- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--white);
  padding: var(--nav-h) 2rem 2rem;
  overflow-y: auto;
}
.mobile-nav.open { display: flex; flex-direction: column; }
.mobile-nav a {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  color: var(--text-dark);
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-200);
  font-weight: 500;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--navy); }

/* ---------- Accessibility ---------- */
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ---------- Print ---------- */
@media print { .navbar, .footer, .hero-buttons { display: none; } }