/* -------------------------------------------------------------
 * 1. Design System & Variables
 * ------------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary: #FFCA05;        /* MU:M Yellow */
  --color-primary-dark: #E6B500;   /* Deep Yellow */
  --color-primary-light: #FFF2C2;  /* Soft Light Yellow */
  --color-dark: #1A1C1E;           /* Deep Charcoal */
  --color-dark-light: #2A2C2F;     /* Medium Charcoal */
  --color-gray-dark: #4B5563;      /* Muted text */
  --color-gray-medium: #9CA3AF;    /* Light text / Borders */
  --color-gray-light: #F3F4F6;     /* Light Gray BG */
  --color-bg: #FDFDFB;             /* Off-white Background */
  --color-white: #FFFFFF;

  /* Curriculum Course Colors */
  --course-white: #CBD5E1;
  --course-pink: #FF6B8B;
  --course-yellow: #FFCA05;
  --course-green: #2ECC71;
  --course-blue: #3498DB;
  --course-red: #E74C3C;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
  --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
}

/* -------------------------------------------------------------
 * 2. Reset & Base Styles
 * ------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Specific elements using Outfit for numbers/english */
h1, h2, h3, h4, .logo-brand, .course-label, .course-symbol, .phone-num, .tab-btn {
  font-family: 'Outfit', 'Noto Sans KR', sans-serif;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  outline: none;
  border: none;
}

button {
  cursor: pointer;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-small {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-subtitle {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-gray-dark);
  max-width: 600px;
  margin: 0 auto;
}

/* Common Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition-normal);
  gap: 8px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-dark);
  box-shadow: 0 4px 15px rgba(255, 202, 5, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 202, 5, 0.45);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-dark);
  border: 2px solid var(--color-dark);
}

.btn-secondary:hover {
  background-color: var(--color-dark);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* -------------------------------------------------------------
 * 3. Header & Navigation
 * ------------------------------------------------------------- */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition-normal);
  background-color: rgba(253, 253, 251, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

#main-header.scrolled {
  padding: 12px 0;
  box-shadow: var(--shadow-sm);
  background-color: var(--color-white);
}

.header-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding var(--transition-normal);
}

#main-header.scrolled .header-container {
  padding: 10px 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 900;
}

.logo-badge-mum {
  background-color: var(--color-primary);
  color: var(--color-dark);
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  box-shadow: 0 2px 8px rgba(255, 202, 5, 0.2);
}

.logo-branch {
  color: var(--color-dark);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-dark-light);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary-dark);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary-dark);
}

.btn-contact-nav {
  background-color: var(--color-dark);
  color: var(--color-white) !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-full);
}

.btn-contact-nav:hover {
  background-color: var(--color-primary) !important;
  color: var(--color-dark) !important;
  transform: translateY(-2px);
}

.btn-contact-nav::after {
  display: none !important;
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--color-dark);
}

/* -------------------------------------------------------------
 * 4. Hero Section
 * ------------------------------------------------------------- */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 120px;
  background: radial-gradient(circle at 80% 20%, var(--color-primary-light) 0%, var(--color-bg) 60%);
}

.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 253, 245, 0.82) 0%, rgba(255, 253, 245, 0.62) 100%);
  z-index: 2;
  pointer-events: none;
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
  z-index: 3;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  background-color: var(--color-white);
  color: var(--color-dark-light);
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title span {
  position: relative;
  display: inline-block;
  z-index: 1;
}

.hero-title span::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 8px;
  width: 100%;
  height: 18px;
  background-color: var(--color-primary);
  z-index: -1;
  opacity: 0.7;
  border-radius: var(--radius-sm);
}

.hero-description {
  font-size: 1.2rem;
  color: var(--color-gray-dark);
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img {
  width: 100%;
  max-width: 420px;
  filter: drop-shadow(0 20px 30px rgba(0, 0, 0, 0.1));
  animation: float 6s ease-in-out infinite;
}

.hero-card-floating {
  position: absolute;
  bottom: 20px;
  left: -20px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  max-width: 240px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 0, 0, 0.05);
  animation: float-delayed 6s ease-in-out infinite;
  z-index: 10;
}

.badge-nest {
  display: inline-block;
  background-color: var(--color-dark);
  color: var(--color-white);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.floating-text {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-dark-light);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes float-delayed {
  0%, 100% { transform: translateY(-10px); }
  50% { transform: translateY(5px); }
}

/* -------------------------------------------------------------
 * 5. Why MU:M Section
 * ------------------------------------------------------------- */
.why-mum-section {
  background-color: var(--color-white);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-card {
  background-color: var(--color-bg);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.why-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.card-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.card-icon-box.yellow {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.card-icon-box.dark {
  background-color: #E2E8F0;
  color: var(--color-dark);
}

.why-card h3 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-dark);
}

.why-card p {
  font-size: 0.95rem;
  color: var(--color-gray-dark);
  line-height: 1.7;
}

/* -------------------------------------------------------------
 * 6. Curriculum Section
 * ------------------------------------------------------------- */
.curriculum-section {
  background-color: var(--color-bg);
}

.curriculum-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.tab-btn {
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 700;
  background-color: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: var(--shadow-sm);
  color: var(--color-dark-light);
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Active tab style matching course colors */
.tab-btn.active[data-target="white"] { background-color: var(--color-white); border-color: var(--course-white); color: var(--color-dark); }
.tab-btn.active[data-target="pink"] { background-color: var(--course-pink); border-color: var(--course-pink); color: var(--color-white); }
.tab-btn.active[data-target="yellow"] { background-color: var(--course-yellow); border-color: var(--course-yellow); color: var(--color-dark); }
.tab-btn.active[data-target="green"] { background-color: var(--course-green); border-color: var(--course-green); color: var(--color-white); }
.tab-btn.active[data-target="blue"] { background-color: var(--course-blue); border-color: var(--course-blue); color: var(--color-white); }
.tab-btn.active[data-target="red"] { background-color: var(--course-red); border-color: var(--course-red); color: var(--color-white); }

.curriculum-contents {
  position: relative;
  min-height: 380px;
}

.curriculum-item {
  display: none;
  animation: fadeIn var(--transition-slow);
}

.curriculum-item.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.course-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border-left: 10px solid var(--course-white);
  transition: transform var(--transition-normal);
}

.course-card:hover {
  transform: scale(1.01);
}

.course-card.border-white { border-left-color: var(--course-white); }
.course-card.border-pink { border-left-color: var(--course-pink); }
.course-card.border-yellow { border-left-color: var(--course-yellow); }
.course-card.border-green { border-left-color: var(--course-green); }
.course-card.border-blue { border-left-color: var(--course-blue); }
.course-card.border-red { border-left-color: var(--course-red); }

.course-info {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.course-label {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.course-label.white { background-color: var(--color-gray-light); color: var(--color-dark-light); }
.course-label.pink { background-color: rgba(255, 107, 139, 0.15); color: var(--course-pink); }
.course-label.yellow { background-color: var(--color-primary-light); color: var(--color-primary-dark); }
.course-label.green { background-color: rgba(46, 204, 113, 0.15); color: var(--course-green); }
.course-label.blue { background-color: rgba(52, 152, 219, 0.15); color: var(--course-blue); }
.course-label.red { background-color: rgba(231, 76, 60, 0.15); color: var(--course-red); }

.course-info h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.course-info h3 .sub {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-gray-dark);
}

.course-desc {
  font-size: 1.05rem;
  color: var(--color-gray-dark);
  margin-bottom: 30px;
  line-height: 1.7;
}

.course-bullets {
  list-style: none;
}

.course-bullets li {
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--color-dark-light);
}

.bullet-check {
  width: 18px;
  height: 18px;
  color: var(--color-primary-dark);
}

.course-graphic {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.course-graphic::before {
  content: '';
  position: absolute;
  width: 80%;
  height: 80%;
  border-radius: 50%;
  opacity: 0.1;
  background-color: var(--color-dark);
  filter: blur(10px);
}

.bg-white-course { background: radial-gradient(circle, #FFFFFF 0%, #E2E8F0 100%); }
.bg-pink-course { background: radial-gradient(circle, #FFF0F2 0%, #FFCAD4 100%); }
.bg-yellow-course { background: radial-gradient(circle, #FFFCEE 0%, #FFF2C2 100%); }
.bg-green-course { background: radial-gradient(circle, #EEFBF4 0%, #C2F0D5 100%); }
.bg-blue-course { background: radial-gradient(circle, #EBF5FB 0%, #D4E6F1 100%); }
.bg-red-course { background: radial-gradient(circle, #FDEDEC 0%, #F5B7B1 100%); }

.course-symbol {
  font-size: 9rem;
  font-weight: 900;
  opacity: 0.15;
  color: var(--color-dark);
  z-index: 1;
}

/* -------------------------------------------------------------
 * 7. Campus Gallery Section
 * ------------------------------------------------------------- */
.gallery-section {
  background-color: var(--color-white);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 4/3;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 30px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 100%);
  color: var(--color-white);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.1);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
  transform: translateY(0);
}

.gallery-overlay h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.gallery-overlay p {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* -------------------------------------------------------------
 * 8. Location & Contact Section
 * ------------------------------------------------------------- */
.location-section {
  background-color: var(--color-bg);
}

.location-wrapper {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: stretch;
}

.location-info-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 30px;
  justify-content: space-between;
}

.info-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.info-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-text h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--color-dark);
}

.info-text p {
  font-size: 0.95rem;
  color: var(--color-gray-dark);
  font-weight: 500;
}

.info-text .sub-text {
  font-size: 0.85rem;
  color: var(--color-gray-medium);
  margin-top: 4px;
}

.phone-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}

.location-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 10px;
}

.location-actions .btn {
  font-size: 0.9rem;
  padding: 12px 18px;
  border-radius: var(--radius-md);
}

.btn-call {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.btn-call:hover {
  background-color: var(--color-primary);
  color: var(--color-dark);
}

.btn-naver-map {
  background-color: #03C75A; /* Naver Green */
  color: var(--color-white);
}

.btn-naver-map:hover {
  background-color: #02b350;
}

.map-container {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  min-height: 400px;
  background-color: #E2E8F0;
  position: relative;
}

.map-view {
  width: 100%;
  height: 100%;
}

.map-fallback {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #FFFCEE 0%, #FFF2C2 100%);
  text-align: center;
  padding: 40px;
}

.fallback-icon {
  width: 64px;
  height: 64px;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
}

.map-fallback p {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.map-fallback span {
  font-size: 0.85rem;
  color: var(--color-gray-dark);
}

/* -------------------------------------------------------------
 * 9. Contact Form Section
 * ------------------------------------------------------------- */
.contact-section {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 100px 0;
  position: relative;
}

.contact-bg-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.section-header.white .section-title {
  color: var(--color-white);
}

.section-header.white .section-desc {
  color: #9CA3AF;
}

.contact-form {
  background-color: var(--color-dark-light);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: span 2;
  margin-bottom: 24px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #E5E7EB;
}

.form-group .required {
  color: var(--course-red);
}

.form-group input,
.form-group select,
.form-group textarea {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #6B7280;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(255, 202, 5, 0.25);
}

.form-group select option {
  background-color: var(--color-dark-light);
  color: var(--color-white);
}

.form-agreement {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
  font-size: 0.85rem;
  color: #9CA3AF;
  cursor: pointer;
}

.form-agreement input {
  accent-color: var(--color-primary);
  width: 16px;
  height: 16px;
}

.btn-submit {
  width: 100%;
  background-color: var(--color-primary);
  color: var(--color-dark);
  font-size: 1.1rem;
  padding: 16px;
  box-shadow: 0 4px 15px rgba(255, 202, 5, 0.2);
}

.btn-submit:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* -------------------------------------------------------------
 * 10. Footer
 * ------------------------------------------------------------- */
.main-footer {
  background-color: #111315;
  color: #9CA3AF;
  padding: 60px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-white);
}

.footer-slogan {
  font-size: 0.9rem;
  color: #E5E7EB;
}

.footer-info {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-info strong {
  color: #E5E7EB;
}

.copyright {
  margin-top: 20px;
  color: #6B7280;
}

/* -------------------------------------------------------------
 * 11. Responsive Styles (Media Queries)
 * ------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  .grid-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-card:last-child {
    grid-column: span 2;
  }
  .course-card {
    grid-template-columns: 1.1fr 0.9fr;
  }
  .location-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }
  .section-title {
    font-size: 2rem;
  }
  .header-container {
    padding: 15px 24px;
  }
  .mobile-toggle {
    display: block;
    z-index: 1001;
  }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    padding: 80px 40px;
    align-items: flex-start;
    gap: 24px;
    transition: right var(--transition-normal);
    z-index: 1000;
  }
  .nav-menu.open {
    right: 0;
  }
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
    padding-top: 40px;
  }
  .hero-content {
    align-items: center;
  }
  .hero-actions {
    justify-content: center;
    width: 100%;
  }
  .hero-image-wrapper {
    margin-top: 20px;
  }
  .hero-card-floating {
    left: 20px;
    bottom: -10px;
  }
  .course-card {
    grid-template-columns: 1fr;
  }
  .course-graphic {
    display: none; /* Hide huge letters on mobile cards */
  }
  .course-info {
    padding: 30px;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
  .footer-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
  }
  .footer-info {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .grid-cards {
    grid-template-columns: 1fr;
  }
  .why-card:last-child {
    grid-column: span 1;
  }
  .tab-btn {
    padding: 10px 18px;
    font-size: 0.9rem;
  }
  .location-actions {
    grid-template-columns: 1fr;
  }
  .contact-form {
    padding: 24px;
  }
}

/* -------------------------------------------------------------
 * 12. New Detail Block Styles (Teacher-Student Intro)
 * ------------------------------------------------------------- */
.why-detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 80px;
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-md);
}

.detail-image-box {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 16/10;
}

.detail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.why-detail-block:hover .detail-img {
  transform: scale(1.03);
}

.detail-content-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.detail-tag {
  display: inline-block;
  background-color: rgba(255, 202, 5, 0.15);
  color: var(--color-primary-dark);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.detail-content-box h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--color-dark);
}

.detail-content-box p {
  font-size: 1rem;
  color: var(--color-gray-dark);
  line-height: 1.7;
  margin-bottom: 16px;
}

.detail-content-box p:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .why-detail-block {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 24px;
    margin-top: 48px;
  }
}

/* -------------------------------------------------------------
 * 13. Process Section Styles (4-Step Learning System)
 * ------------------------------------------------------------- */
.process-section {
  background-color: var(--color-white);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

/* Connect line between process cards on desktop */
.process-grid::before {
  content: '';
  position: absolute;
  top: 130px;
  left: 10%;
  width: 80%;
  height: 2px;
  background-color: var(--color-gray-light);
  z-index: 1;
}

.process-step {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.step-num {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-dark);
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(255, 202, 5, 0.3);
  margin-bottom: 24px;
  border: 4px solid var(--color-white);
}

.step-card {
  background-color: var(--color-bg);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  height: calc(100% - 74px); /* Account for step-num and margin */
  width: 100%;
}

.step-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-dark);
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
  line-height: 1.3;
}

.step-subtitle {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--color-gray-dark);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
  .process-grid::before {
    display: none;
  }
}

@media (max-width: 576px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

/* -------------------------------------------------------------
 * 14. Credentials Section (본사 실적 지표)
 * ------------------------------------------------------------- */
.credentials-section {
  background-color: #111315;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}

/* 우상향 상승곡선 그래프 백그라운드 디자인 */
.credentials-chart-bg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 202, 5, 0.05) 0%, rgba(17, 19, 21, 0) 60%);
  pointer-events: none;
}

.credentials-chart-bg::before {
  content: '';
  position: absolute;
  bottom: 10%;
  left: -10%;
  width: 120%;
  height: 300px;
  border-top: 2px dashed rgba(255, 202, 5, 0.15);
  transform: rotate(-10deg);
  transform-origin: bottom left;
}

.credentials-chart-bg::after {
  content: '';
  position: absolute;
  bottom: 15%;
  left: -10%;
  width: 120%;
  height: 400px;
  border-top: 3px solid rgba(255, 202, 5, 0.25);
  transform: rotate(-12deg);
  transform-origin: bottom left;
  filter: drop-shadow(0 0 10px rgba(255, 202, 5, 0.3));
}

.credentials-header {
  text-align: center;
  margin-bottom: 60px;
  position: relative;
  z-index: 2;
}

.credentials-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-white);
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 2;
}

.credential-item {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 40px 30px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.credential-item:hover {
  transform: translateY(-8px);
  background-color: rgba(255, 255, 255, 0.06);
  border-color: var(--color-primary);
}

.cred-label {
  display: block;
  font-size: 0.95rem;
  color: #9CA3AF;
  margin-bottom: 16px;
  font-weight: 600;
}

.cred-value {
  display: block;
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.1;
  font-family: 'Outfit', sans-serif;
}

.cred-value .unit {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-left: 4px;
}

/* -------------------------------------------------------------
 * 15. Smart Learning Systems Section (4컬러 스마트 카드)
 * ------------------------------------------------------------- */
.smart-learning-section {
  background-color: var(--color-bg);
}

.smart-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.smart-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  padding: 40px 30px;
  height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
}

/* 본사 스크린샷 4개 고유 컬러 스키마 반영 */
.card-purple { background: linear-gradient(135deg, #7c3aed 0%, #6100c1 100%); color: var(--color-white); }
.card-lime { background: linear-gradient(135deg, #a2de26 0%, #85b90a 100%); color: var(--color-white); }
.card-magenta { background: linear-gradient(135deg, #ec4899 0%, #d6006e 100%); color: var(--color-white); }
.card-navy { background: linear-gradient(135deg, #1d4ed8 0%, #002c91 100%); color: var(--color-white); }

/* 배경에 부드러운 오버레이 데코 */
.smart-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.smart-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.smart-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  align-self: flex-start;
  letter-spacing: 0.5px;
}

.smart-card h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 12px;
  font-family: 'Outfit', sans-serif;
  letter-spacing: -0.5px;
}

.smart-desc {
  font-size: 0.95rem;
  opacity: 0.85;
  line-height: 1.5;
  margin-bottom: 24px;
}

/* 본사의 노란색 More / System Detail 알약 버튼 스타일 */
.btn-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-primary);
  color: var(--color-dark);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  align-self: flex-start;
  transition: all var(--transition-fast);
}

.smart-card:hover .btn-more {
  background-color: var(--color-white);
  color: var(--color-dark);
  padding-right: 22px;
}

/* -------------------------------------------------------------
 * 16. Sticky Bottom Quick Bar (하단 고정 상담바)
 * ------------------------------------------------------------- */
.sticky-quick-bar {
  position: fixed;
  bottom: -100px; /* Hidden by default */
  left: 0;
  width: 100%;
  background-color: rgba(17, 19, 21, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.3);
  z-index: 999;
  padding: 16px 0;
  transition: bottom var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(15px);
}

.sticky-quick-bar.show {
  bottom: 0;
}

.quick-bar-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quick-bar-text {
  color: var(--color-white);
  font-size: 1.05rem;
  font-weight: 500;
}

.quick-bar-text strong {
  color: var(--color-primary);
  font-weight: 700;
}

.quick-bar-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* 본사 특유의 노란 알약 및 검은 알약 버튼 스타일 구현 */
.btn-quick {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 10px 24px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-quick-counsel {
  background-color: var(--color-primary);
  color: var(--color-dark);
  border: 2px solid var(--color-primary);
  box-shadow: 0 4px 10px rgba(255, 202, 5, 0.2);
}

.btn-quick-counsel:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

.btn-quick-call {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-quick-call:hover {
  background-color: var(--color-primary);
  color: var(--color-dark);
  transform: translateY(-2px);
}

/* -------------------------------------------------------------
 * 17. Responsive Updates for New Sections
 * ------------------------------------------------------------- */
@media (max-width: 1024px) {
  .credentials-title {
    font-size: 2rem;
  }
  .credentials-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .smart-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sticky-quick-bar {
    padding: 12px 0;
  }
  .quick-bar-container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .quick-bar-text {
    font-size: 0.95rem;
  }
  .quick-bar-actions {
    width: 100%;
    justify-content: center;
  }
  .btn-quick {
    flex: 1;
    justify-content: center;
    max-width: 200px;
    font-size: 0.85rem;
    padding: 8px 16px;
  }
}

@media (max-width: 576px) {
  .credentials-grid {
    grid-template-columns: 1fr;
  }
  .smart-grid {
    grid-template-columns: 1fr;
  }
  .smart-card {
    height: 280px;
  }
  .quick-bar-text {
    display: none; /* Hide text on small mobiles to save space */
  }
  .quick-bar-actions {
    width: 100%;
    padding: 0 10px;
  }
}

/* -------------------------------------------------------------
 * 18. Director Introduction Section Styles (원장님 말씀)
 * ------------------------------------------------------------- */
.director-section {
  background-color: var(--color-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.director-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
  align-items: center;
}

.director-image-box {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.director-img {
  width: 100%;
  display: block;
  transition: transform var(--transition-normal);
}

.director-image-box:hover .director-img {
  transform: scale(1.03);
}

.director-info-card {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0) 100%);
  padding: 30px 24px 20px 24px;
  color: var(--color-white);
}

.director-info-card h4 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.director-info-card h4 .title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-left: 8px;
}

.director-info-card .subtitle {
  font-size: 0.85rem;
  opacity: 0.8;
}

.director-content-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.director-main-quote {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--color-dark);
  margin-top: 12px;
  margin-bottom: 30px;
  letter-spacing: -1px;
}

.director-philosophy {
  margin-bottom: 36px;
}

.philosophy-p {
  font-size: 1rem;
  color: var(--color-gray-dark);
  line-height: 1.75;
  margin-bottom: 18px;
}

.philosophy-p:last-child {
  margin-bottom: 0;
}

.philosophy-p strong {
  color: var(--color-primary-dark);
  font-weight: 700;
}

.director-credentials-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cred-tag {
  background-color: var(--color-white);
  color: var(--color-dark-light);
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 992px) {
  .director-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .director-image-box {
    max-width: 480px;
    margin: 0 auto;
  }
}

/* -------------------------------------------------------------
 * 19. Testimonials Section Styles (학부모 후기)
 * ------------------------------------------------------------- */
.testimonials-section {
  background-color: var(--color-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.testimonial-card {
  background-color: var(--color-bg);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-md);
  padding: 40px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-dark);
}

.quote-icon {
  color: var(--color-primary);
  font-size: 2.2rem;
  margin-bottom: 20px;
  opacity: 0.6;
  align-self: flex-start;
}

.testimonial-text {
  font-size: 0.98rem;
  color: var(--color-gray-dark);
  line-height: 1.75;
  margin-bottom: 30px;
}

.parent-profile {
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 20px;
}

.parent-img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-primary);
}

.parent-info h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.age-tag {
  font-size: 0.75rem;
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.parent-info p {
  font-size: 0.82rem;
  color: var(--color-gray-dark);
}

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}