/* ==========================================================================
   CSS Variables & Base Reset
   ========================================================================== */
:root {
  --primary-navy: #092348;
  --navy-dark: #061933;
  --navy-deep: #0b254d;
  --navy-light: #163665;
  --royal-blue: #1b66d4;
  --blue-accent: #2272e5;
  --sky-blue: #58b6ec;
  --cyan-bright: #29b6f6;
  --purple-accent: #7966c7;
  --mint-accent: #21b8b6;
  
  --text-main: #132238;
  --text-sub: #4f6075;
  --text-muted: #748398;
  --text-light: #94a3b8;
  
  --bg-white: #ffffff;
  --bg-light: #f5f8fc;
  --bg-soft: #f4f6fa;
  --bg-blue-tint: #edf6fd;
  --bg-card: #f8fafc;
  
  --border-line: #e3ebf4;
  --border-light: #edf2f7;
  --border-strong: #cbd7e6;
  
  --max-width: 1180px;
  --font-kr: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", sans-serif;
  --font-serif: Georgia, "Times New Roman", 'Playfair Display', serif;
  --font-display: 'Cinzel', Georgia, serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-kr);
  color: var(--text-main);
  background-color: var(--bg-white);
  line-height: 1.6;
  word-break: keep-all;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
}

/* Common Section Styles */
section {
  position: relative;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 28px;
  padding-bottom: 12px;
  gap: 16px;
}

.section-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.section-main-title {
  font-family: var(--font-en);
  font-size: 27px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.2;
}

.section-sub-desc {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: -0.02em;
}

.section-more-link {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--blue-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  padding-bottom: 2px;
}

.section-more-link:hover {
  color: #0c4ea8;
  transform: translateX(2px);
}

/* Pill Button */
.pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #ffffff;
  color: var(--primary-navy);
  border: 1px solid #cfdbe8;
  padding: 11px 24px;
  border-radius: 9999px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  box-shadow: 0 2px 6px rgba(15, 45, 89, 0.04);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.pill-btn:hover {
  background: #f8fafc;
  border-color: #9cb5d3;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(15, 45, 89, 0.08);
  color: var(--royal-blue);
}

.pill-btn span.arrow {
  font-size: 15px;
  transition: transform 0.2s ease;
}

.pill-btn:hover span.arrow {
  transform: translateX(3px);
}

/* ==========================================================================
   1. Header
   ========================================================================== */
.header {
  height: 82px;
  background: #ffffff;
  border-bottom: 1px solid rgba(13, 44, 88, 0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background-color 0.3s, box-shadow 0.3s;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(7, 28, 62, 0.07);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* Hanyang Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.hyu-seal-svg {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.header__logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header__logo-univ {
  font-size: 21px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.header__logo-divider {
  width: 1px;
  height: 14px;
  background: #c5d4e6;
}

.header__logo-dept {
  font-size: 11.5px;
  font-weight: 700;
  color: #1a4277;
  letter-spacing: -0.02em;
}

.header__logo-sub {
  font-size: 9.5px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-top: 2px;
}

/* GNB Navigation */
.header__nav {
  display: flex;
  align-items: center;
  gap: 48px;
}

.header__nav-link {
  font-size: 15.5px;
  font-weight: 700;
  color: #1d3354;
  letter-spacing: -0.02em;
  position: relative;
  padding: 6px 0;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--royal-blue);
  transition: all 0.25s ease;
  transform: translateX(-50%);
}

.header__nav-link:hover {
  color: var(--royal-blue);
}

.header__nav-link:hover::after {
  width: 100%;
}

/* Mobile Hamburger */
.header__burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  padding: 6px;
  flex-direction: column;
  justify-content: space-around;
  z-index: 1100;
}

.header__burger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background-color: var(--primary-navy);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */
.hero {
  position: relative;
  min-height: 530px;
  background: linear-gradient(110deg, #061933 0%, #09264f 42%, #0e4f84 82%, #1168a6 100%);
  color: #ffffff;
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* Ambient Hero Background */
.hero__bg-art {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Glowing AI Network Spheres & Nodes */
.hero__globe {
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  right: 18%;
  top: 50%;
  transform: translateY(-50%);
  background: 
    radial-gradient(circle at 45% 40%, rgba(255, 255, 255, 0.22) 0%, transparent 28%),
    radial-gradient(circle at 55% 45%, rgba(41, 182, 246, 0.35) 0%, transparent 52%),
    radial-gradient(circle, rgba(14, 114, 196, 0.2) 0%, transparent 75%);
  box-shadow: 
    inset 0 0 80px rgba(41, 182, 246, 0.4),
    0 0 90px rgba(33, 150, 243, 0.35);
  border: 1px solid rgba(135, 211, 255, 0.38);
}

.hero__globe::before,
.hero__globe::after {
  content: "";
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  border: 1px solid rgba(179, 229, 252, 0.45);
  transform: rotate(25deg);
}

.hero__globe::after {
  transform: rotate(82deg) scaleX(0.5);
}

/* Lens / Bio-Medical Research Graphic Right */
.hero__cylinder {
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  width: 240px;
  height: 460px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0%, rgba(130, 205, 255, 0.24) 40%, rgba(4, 18, 38, 0.7) 100%);
  border-radius: 20px 0 0 20px;
  box-shadow: -24px 0 60px rgba(17, 104, 166, 0.3);
  backdrop-filter: blur(1px);
}

.hero__cylinder::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 48%;
  width: 290px;
  height: 28px;
  background: linear-gradient(90deg, #325a80, #a0d1eb 46%, #122b49);
  border-radius: 14px;
  transform: rotate(3deg);
  box-shadow: 0 16px 28px rgba(0, 0, 0, 0.35);
}

/* Subtle Network Particles Grid */
.hero__grid-mesh {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 18% 22%, rgba(129, 212, 250, 0.8) 0 2px, transparent 3px),
    radial-gradient(circle at 48% 65%, rgba(129, 212, 250, 0.7) 0 1.5px, transparent 2.5px),
    radial-gradient(circle at 72% 38%, rgba(129, 212, 250, 0.8) 0 2px, transparent 3px),
    radial-gradient(circle at 84% 78%, rgba(129, 212, 250, 0.6) 0 1.5px, transparent 2.5px);
  background-size: 96px 96px;
  opacity: 0.32;
}

.hero__container {
  position: relative;
  z-index: 5;
  padding: 64px 0 68px;
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
}

.hero__content {
  max-width: 680px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: 51px;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 14px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.25);
}

.hero__subtitle {
  font-family: var(--font-serif);
  font-size: 23px;
  font-weight: 400;
  color: #e5f3ff;
  margin-bottom: 38px;
  letter-spacing: 0.02em;
}

.hero__tagline-ko {
  font-size: 17.5px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero__tagline-en {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 400;
}

/* ==========================================================================
   3. Stats Bar
   ========================================================================== */
.stats {
  background: #ffffff;
  border-bottom: 1px solid var(--border-line);
  padding: 24px 0 22px;
  position: relative;
  z-index: 10;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
}

.stats__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 28px;
  border-right: 1px solid var(--border-line);
}

.stats__item:last-child {
  border-right: none;
}

.stats__icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #eff6ff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--royal-blue);
  font-size: 24px;
  flex-shrink: 0;
}

.stats__text {
  display: flex;
  flex-direction: column;
}

.stats__primary-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  line-height: 1.15;
}

.stats__num {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
}

.stats__en-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-navy);
  letter-spacing: -0.01em;
}

.stats__ko-desc {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: -0.02em;
}

/* ==========================================================================
   4. About Section
   ========================================================================== */
.about-section {
  padding: 64px 0 76px;
  background: #ffffff;
}

.about__grid {
  display: grid;
  grid-template-columns: 1.32fr 0.96fr;
  gap: 16px;
}

/* Left Card: Director & Vision */
.about__card-main {
  background: #f4f6fa;
  border-radius: 4px;
  padding: 38px 40px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: center;
  position: relative;
}

.about__portrait-box {
  width: 100%;
  height: 240px;
  background: #e6ebf2;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  box-shadow: 0 4px 12px rgba(15, 35, 60, 0.05);
}

.about__portrait-svg {
  width: 150px;
  height: 220px;
}

.about__badge-label {
  font-family: var(--font-en);
  font-size: 12.5px;
  font-weight: 800;
  color: var(--royal-blue);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.about__badge-label::after {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--royal-blue);
}

.about__main-heading {
  font-size: 23px;
  font-weight: 700;
  color: var(--primary-navy);
  line-height: 1.45;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.about__main-heading .highlight {
  color: var(--royal-blue);
}

.about__main-p {
  font-size: 13.5px;
  line-height: 1.85;
  color: #55667d;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

/* Right Card: Quote & PIs */
.about__card-quote {
  background: var(--bg-blue-tint);
  border-radius: 4px;
  padding: 36px 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.about__quote-mark {
  color: #92bce3;
  font-size: 38px;
  line-height: 0.7;
  margin-bottom: 10px;
}

.about__quote-text {
  font-family: var(--font-serif);
  font-size: 17.5px;
  line-height: 1.62;
  color: #21406c;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.about__pi-block {
  border-top: 1px solid rgba(144, 185, 222, 0.35);
  padding-top: 20px;
}

.about__pi-title {
  font-size: 12px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.about__pi-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.pi-card {
  background: #ffffff;
  padding: 12px 14px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(22, 60, 108, 0.05);
  border: 1px solid #e1ecf7;
}

.pi-card__avatar-box {
  width: 42px;
  height: 50px;
  border-radius: 6px;
  background: #e8eff7;
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pi-card__info {
  display: flex;
  flex-direction: column;
}

.pi-card__role {
  font-size: 9.5px;
  color: #6a7d97;
  line-height: 1.3;
  margin-bottom: 2px;
}

.pi-card__name {
  font-size: 12.5px;
  font-weight: 800;
  color: var(--primary-navy);
}

/* ==========================================================================
   5. Global Scholars Section
   ========================================================================== */
.scholars-section {
  padding: 10px 0 76px;
  background: #ffffff;
}

.scholars__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.scholar-card {
  background: #ffffff;
  border: 1px solid #e1e7f0;
  border-radius: 4px;
  padding: 0 14px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.scholar-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(11, 37, 75, 0.09);
  border-color: #cbdbee;
}

/* Track Badge */
.scholar-card__track-badge {
  background: var(--primary-navy);
  color: #ffffff;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 0 0 4px 4px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.scholar-card__track-title {
  font-size: 11px;
  font-weight: 600;
  color: #2b558c;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  line-height: 1.3;
  padding: 0 4px;
}

/* Scholar Photo Area */
.scholar-card__photo-wrap {
  width: 100%;
  height: 160px;
  background: linear-gradient(180deg, #f4f8fd 0%, #e9eff7 100%);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
}

.scholar-card__name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-navy);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.scholar-card__affil {
  font-size: 10.5px;
  color: #64758d;
  min-height: 34px;
  line-height: 1.35;
  padding: 0 6px;
  margin-bottom: 14px;
}

/* Topic Box */
.scholar-card__topic-box {
  width: 100%;
  background: #f5f8fc;
  border-radius: 4px;
  padding: 10px 10px;
  font-size: 10px;
  color: #55667c;
  line-height: 1.45;
  text-align: left;
  margin-top: auto;
  border: 1px solid #ebf1f8;
}

.scholar-card__topic-label {
  font-weight: 700;
  color: #3b5a82;
  display: block;
  margin-bottom: 2px;
}

.scholar-card__link {
  font-size: 11px;
  font-weight: 700;
  color: var(--royal-blue);
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.scholar-card__link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   6. Beyond Borders Banner
   ========================================================================== */
.banner-section {
  background: linear-gradient(90deg, #ffffff 0%, #f6fafd 50%, #eaf3fb 100%);
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: 68px 0;
  position: relative;
  overflow: hidden;
}

/* Orbit Rings and Network Glow */
.banner-section__bg-art {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 580px;
  height: 360px;
  pointer-events: none;
}

.banner-section__ring {
  position: absolute;
  width: 520px;
  height: 240px;
  border-radius: 50%;
  border-top: 2px solid rgba(34, 114, 229, 0.28);
  border-right: 2px solid rgba(41, 182, 246, 0.2);
  transform: rotate(-12deg);
  box-shadow: 
    0 -16px 36px rgba(34, 114, 229, 0.08),
    0 -32px 64px rgba(41, 182, 246, 0.06);
}

.banner-section__ring-inner {
  position: absolute;
  width: 420px;
  height: 190px;
  top: 25px;
  left: 50px;
  border-radius: 50%;
  border-top: 1.5px dashed rgba(121, 102, 199, 0.3);
  transform: rotate(6deg);
}

.banner-section__content {
  position: relative;
  z-index: 2;
}

.banner-section__label {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 800;
  color: var(--royal-blue);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-section__label::after {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--royal-blue);
}

.banner-section__title {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  line-height: 1.2;
}

.banner-section__en {
  font-family: var(--font-serif);
  font-size: 22px;
  line-height: 1.3;
  color: #4f637b;
  letter-spacing: -0.01em;
}

/* ==========================================================================
   7. Program Timeline Section
   ========================================================================== */
.program-section {
  padding: 72px 0 76px;
  background: #ffffff;
}

.program__timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
  margin-top: 20px;
}

/* Top Horizontal Timeline Line */
.program__timeline::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 10px;
  right: 10px;
  height: 2px;
  background: linear-gradient(90deg, #1b66d4 0%, #7966c7 35%, #21b8b6 70%, #1b66d4 100%);
  z-index: 1;
}

.program__card {
  position: relative;
  padding: 34px 24px 0 20px;
  border-right: 1px solid #e6ecf4;
  min-height: 330px;
  display: flex;
  flex-direction: column;
}

.program__card:last-child {
  border-right: none;
}

/* Timeline Pin Node */
.program__node {
  position: absolute;
  top: 0;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--royal-blue);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 1px var(--royal-blue);
  z-index: 3;
}

.program__card:nth-child(2) .program__node {
  background: var(--purple-accent);
  box-shadow: 0 0 0 1px var(--purple-accent);
}

.program__card:nth-child(3) .program__node {
  background: var(--mint-accent);
  box-shadow: 0 0 0 1px var(--mint-accent);
}

.program__card:nth-child(4) .program__node {
  background: var(--royal-blue);
  box-shadow: 0 0 0 1px var(--royal-blue);
}

.program__date {
  font-family: var(--font-en);
  font-size: 13.5px;
  font-weight: 800;
  color: var(--royal-blue);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.program__card:nth-child(2) .program__date {
  color: var(--purple-accent);
}

.program__card:nth-child(3) .program__date {
  color: #1a9e9c;
}

.program__track-num {
  font-size: 11px;
  font-weight: 700;
  color: #6a82a0;
  margin-bottom: 8px;
}

.program__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-navy);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  min-height: 46px;
}

.program__meta-info {
  font-size: 11.5px;
  color: #55677e;
  line-height: 1.6;
  margin-bottom: 12px;
}

.program__location {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  margin-bottom: 8px;
}

.program__speaker-label {
  font-size: 10.5px;
  color: #7b8d9f;
  display: block;
  margin-top: 6px;
}

.program__speaker-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-top: 2px;
}

/* Keynote Lecture Box */
.program__keynote-box {
  margin-top: auto;
  background: #eff6fd;
  border-left: 3px solid var(--royal-blue);
  padding: 10px 12px;
  border-radius: 0 4px 4px 0;
  font-size: 10.5px;
  color: #3b5879;
  line-height: 1.45;
}

.program__keynote-badge {
  font-weight: 800;
  color: var(--royal-blue);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 3px;
}

/* ==========================================================================
   8. Mentoring Section
   ========================================================================== */
.mentoring-section {
  background: linear-gradient(100deg, rgba(235, 244, 253, 0.95) 0%, rgba(245, 250, 255, 0.9) 100%);
  padding: 76px 0 88px;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border-line);
}

/* Light Lab Background Graphic */
.mentoring-section::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at 75% 45%, rgba(94, 160, 219, 0.16) 0%, transparent 45%);
  pointer-events: none;
}

.mentoring__header {
  margin-bottom: 36px;
}

.mentoring__label {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 800;
  color: var(--royal-blue);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.mentoring__label::after {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--royal-blue);
}

.mentoring__title {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  line-height: 1.2;
}

.mentoring__cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.m-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid #dfe7f2;
  border-radius: 6px;
  padding: 24px 20px;
  min-height: 170px;
  box-shadow: 0 6px 20px rgba(15, 45, 90, 0.04);
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}

.m-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(15, 45, 90, 0.08);
  border-color: #cbdbee;
}

.m-card__top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.m-card__icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #eaf3fe;
  color: var(--royal-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.m-card:nth-child(2) .m-card__icon-box {
  background: #f2eefa;
  color: var(--purple-accent);
}

.m-card:nth-child(3) .m-card__icon-box {
  background: #e8f9f8;
  color: var(--mint-accent);
}

.m-card:nth-child(4) .m-card__icon-box {
  background: #edf4fe;
  color: var(--royal-blue);
}

.m-card__num {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 800;
  color: var(--royal-blue);
  line-height: 1;
}

.m-card:nth-child(2) .m-card__num {
  color: var(--purple-accent);
}

.m-card:nth-child(3) .m-card__num {
  color: #1b9b99;
}

.m-card__title {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
  margin-top: 4px;
}

.m-card__sub-en {
  font-size: 9.5px;
  font-weight: 700;
  color: #8b9bb0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 2px;
}

.m-card__desc {
  font-size: 11.5px;
  color: #5c6e84;
  line-height: 1.65;
  letter-spacing: -0.02em;
  margin-top: auto;
}

/* ==========================================================================
   9. Footer
   ========================================================================== */
.footer {
  background: #ffffff;
  border-top: 1px solid var(--border-line);
  padding: 44px 0 52px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer__info-title {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--primary-navy);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.footer__program-name {
  font-size: 12px;
  font-weight: 600;
  color: #4b5d73;
  margin-bottom: 8px;
}

.footer__address {
  font-size: 11px;
  color: #7d8ea3;
  line-height: 1.7;
}

.footer__seal-wrap {
  flex-shrink: 0;
}

.footer__seal {
  width: 64px;
  height: 64px;
}

/* ==========================================================================
   10. Responsive Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero__title {
    font-size: 42px;
  }
  .hero__subtitle {
    font-size: 20px;
  }
  .hero__globe {
    width: 380px;
    height: 380px;
    right: 5%;
  }
  .about__grid {
    grid-template-columns: 1fr;
  }
  .scholars__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .program__timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 0;
  }
  .program__timeline::before {
    display: none;
  }
  .program__card {
    border-right: none;
    border-top: 1px solid #e6ecf4;
    padding-top: 28px;
  }
  .program__card:nth-child(1),
  .program__card:nth-child(2) {
    border-top: none;
  }
  .mentoring__cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }
  .header__burger {
    display: flex;
  }
  .header {
    height: 72px;
  }
  .header__logo-sub {
    display: none;
  }
  .header__logo-univ {
    font-size: 18px;
  }

  /* Mobile GNB Menu Open State */
  .header__nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 24px;
    gap: 20px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-line);
  }

  .hero {
    min-height: auto;
    padding: 56px 0 64px;
  }
  .hero__title {
    font-size: 34px;
  }
  .hero__subtitle {
    font-size: 18px;
    margin-bottom: 28px;
  }
  .hero__globe {
    opacity: 0.25;
    right: -100px;
  }
  .hero__cylinder {
    display: none;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 0;
  }
  .stats__item {
    padding: 6px 14px;
  }
  .stats__item:nth-child(2) {
    border-right: none;
  }

  .about__card-main {
    grid-template-columns: 1fr;
    padding: 28px 24px;
  }
  .about__portrait-box {
    height: 180px;
    max-width: 200px;
    margin: 0 auto;
  }
  .about__card-quote {
    padding: 28px 24px;
  }
  .about__pi-cards {
    grid-template-columns: 1fr;
  }

  .banner-section {
    padding: 52px 0;
  }
  .banner-section__title {
    font-size: 28px;
  }
  .banner-section__en {
    font-size: 18px;
  }

  .scholars__grid {
    grid-template-columns: 1fr;
  }
  .program__timeline {
    grid-template-columns: 1fr;
  }
  .program__card {
    min-height: auto;
    padding-bottom: 24px;
    border-top: 1px solid #e6ecf4 !important;
  }
  .program__card:first-child {
    border-top: none !important;
  }

  .mentoring__title {
    font-size: 29px;
  }
  .mentoring__cards-grid {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}