:root {
  --primary-blue: #0f4c81;     /* Trust */
  --light-blue: #2563eb;
  --accent-orange: #f97316;    /* CTA */
  --orange-hover: #ea580c;
  --text-dark: #0f172a;
  --text-gray: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.2);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--bg-white);
  overflow-x: hidden;
}

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

/* Utilities */
.text-blue { color: var(--light-blue); }
.text-orange { color: var(--accent-orange); }
.text-center { text-align: center; }
.bg-light { background-color: var(--bg-light); }
.position-relative { position: relative; }

/* Buttons */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 16px 36px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-orange), var(--orange-hover));
  color: white;
  box-shadow: 0 10px 20px rgba(249, 115, 22, 0.25);
}
.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(249, 115, 22, 0.4);
}
.btn-secondary {
  background: #fae100; /* Kakao yellow */
  color: #3e2723;
  box-shadow: 0 10px 20px rgba(250, 225, 0, 0.2);
}
.btn-secondary:hover {
  transform: translateY(-4px);
  background: #f4d500;
  box-shadow: 0 15px 30px rgba(250, 225, 0, 0.3);
}
.btn-large {
  padding: 20px 48px;
  font-size: 1.2rem;
  width: 100%;
  max-width: 350px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all 0.3s ease;
  padding: 16px 0;
}
.navbar.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  padding: 12px 0;
}
.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-blue);
  letter-spacing: -0.5px;
}
.logo span {
  color: var(--accent-orange);
}
.cta-nav {
  text-decoration: none;
  background: var(--primary-blue);
  color: white;
  padding: 12px 28px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: 0.3s;
}
.cta-nav:hover {
  background: var(--light-blue);
  transform: translateY(-2px);
}

/* Animations */
@keyframes pulseGlow {
  0% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.6); }
  70% { box-shadow: 0 0 0 15px rgba(249, 115, 22, 0); }
  100% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0); }
}
.pulse {
  animation: pulseGlow 2.5s infinite;
}

/* Scroll Fade Init */
.fade-up, .fade-in-left, .fade-in-right {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up { transform: translateY(40px); }
.fade-in-left { transform: translateX(-40px); }
.fade-in-right { transform: translateX(40px); }

.visible {
  opacity: 1;
  transform: translate(0, 0);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: -1;
}
.hero-img {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.05);
  animation: slowZoom 25s infinite alternate ease-in-out;
}
@keyframes slowZoom { 
  from { transform: scale(1.0); } 
  to { transform: scale(1.15); } 
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(120deg, rgba(15, 76, 129, 0.92) 0%, rgba(15, 76, 129, 0.7) 100%);
}
.hero-content {
  color: white;
  max-width: 680px;
  z-index: 1;
  padding: 40px 0;
}
.badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 20px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-bottom: 28px;
}
.hero-title {
  font-size: 4rem;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 28px;
  letter-spacing: -1px;
}
.hero-title .highlight {
  color: var(--accent-orange);
}
.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 48px;
  opacity: 0.9;
  line-height: 1.7;
}

/* Problem Section */
.glass-section {
  padding: 100px 0;
  background: rgba(255, 255, 255, 0.95);
  position: relative;
  margin-top: -60px;
  border-radius: 40px 40px 0 0;
  box-shadow: 0 -15px 40px rgba(0,0,0,0.06);
}
.problems-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 70px;
}
.problem-card {
  background: white;
  padding: 48px 32px;
  border-radius: 24px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.04);
  text-align: center;
  border: 1px solid rgba(0,0,0,0.04);
  transition: transform 0.3s ease;
}
.problem-card:hover { transform: translateY(-5px); }
.problem-card .icon {
  font-size: 3.5rem;
  margin-bottom: 24px;
}
.problem-card p {
  font-size: 1.3rem;
  font-weight: 600;
  color: #334155;
  line-height: 1.5;
}
.solution-box {
  background: var(--primary-blue);
  color: white;
  padding: 64px 40px;
  border-radius: 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.solution-box::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.solution-box h2 {
  font-size: 2.4rem;
  margin-bottom: 32px;
}
.check-list {
  list-style: none;
  font-size: 1.25rem;
  text-align: left;
  max-width: 550px;
  margin: 0 auto 40px;
}
.check-list li {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  font-weight: 500;
}
.check {
  color: var(--accent-orange);
  font-weight: bold;
  margin-right: 16px;
  font-size: 1.6rem;
}
.solution-highlight {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  padding: 24px 32px;
  border-radius: 20px;
  font-size: 1.35rem;
  backdrop-filter: blur(8px);
}

/* Benefits Section */
.benefits {
  padding: 120px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 70px;
}
.section-header h2 {
  font-size: 2.8rem;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.section-header p {
  font-size: 1.25rem;
  color: var(--text-gray);
}
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 80px;
}
.benefit-item {
  display: flex;
  background: white;
  padding: 40px;
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid rgba(0,0,0,0.03);
}
.benefit-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}
.benefit-icon {
  font-size: 2.8rem;
  margin-right: 24px;
  background: var(--bg-light);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 20px;
}
.benefit-text {
  flex: 1;
}
.benefit-text h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: var(--primary-blue);
}
.benefit-text p {
  color: var(--text-gray);
  font-size: 1.05rem;
}
.image-showcase {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.showcase-img {
  width: 100%;
  border-radius: 24px;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}
.img-caption {
  margin-top: 20px;
  font-size: 1.05rem;
  color: var(--text-gray);
  font-weight: 500;
}

/* Instructor Section */
.instructor {
  padding: 120px 0;
  background: white;
}
.instructor-wrap {
  display: flex;
  align-items: center;
  gap: 80px;
}
.instructor-image {
  flex: 1;
}
.instructor-image img {
  width: 100%;
  border-radius: 32px;
  box-shadow: 0 25px 60px rgba(15, 76, 129, 0.15);
}
.instructor-info {
  flex: 1.1;
}
.instructor-info .label {
  display: inline-block;
  color: var(--accent-orange);
  background: rgba(249, 115, 22, 0.1);
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 20px;
}
.instructor-info h2 {
  font-size: 2.5rem;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}
.divider {
  width: 80px;
  height: 4px;
  background: var(--light-blue);
  margin-bottom: 32px;
  border-radius: 2px;
}
.instructor-history {
  list-style: none;
  margin-bottom: 40px;
}
.instructor-history li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 16px;
  font-size: 1.15rem;
  color: #334155;
  font-weight: 500;
}
.instructor-history li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--light-blue);
  font-weight: bold;
  font-size: 1.2rem;
}
.quote {
  font-size: 1.25rem;
  font-style: italic;
  padding: 32px;
  background: var(--bg-light);
  border-left: 4px solid var(--accent-orange);
  border-radius: 0 20px 20px 0;
  color: #475569;
  line-height: 1.6;
}

/* Reviews */
.reviews {
  padding: 120px 0;
  background-color: var(--primary-blue);
  color: white;
  position: relative;
  overflow: hidden;
}
.reviews::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
}
.reviews h2 {
  font-size: 2.8rem;
  margin-bottom: 70px;
}
.review-carousel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.review-card {
  background: rgba(255, 255, 255, 0.1);
  padding: 40px;
  border-radius: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: transform 0.3s ease;
}
.review-card:hover { transform: translateY(-8px); }
.stars {
  font-size: 1.4rem;
  margin-bottom: 20px;
  letter-spacing: 2px;
}
.review-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: #fff;
}
.review-card p {
  font-size: 1.05rem;
  opacity: 0.85;
  line-height: 1.6;
}

/* FAQ Section */
.faq {
  padding: 120px 0;
}
.faq h2 {
  font-size: 2.8rem;
  margin-bottom: 60px;
}
.faq-list {
  max-width: 850px;
  margin: 0 auto;
}
.faq-item {
  margin-bottom: 20px;
  background: white;
  border: 1px solid rgba(0,0,0,0.05);
  border-radius: 16px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 28px 32px;
  background: white;
  border: none;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s;
}
.faq-question:hover {
  background: #f8fafc;
}
.faq-question .arrow {
  transition: transform 0.3s ease;
  color: var(--light-blue);
  font-size: 1rem;
}
.faq-question.active .arrow {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out, padding 0.4s ease-in-out;
  background: #f8fafc;
}
.faq-answer p {
  padding: 0 32px 28px;
  font-size: 1.1rem;
  color: #475569;
  line-height: 1.6;
}

/* Final CTA */
.final-cta {
  padding: 140px 0;
  text-align: center;
  background-color: #0f172a;
  color: white;
  overflow: hidden;
}
.pb-absolute {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0.15;
}
.map-img {
  width: 100%; height: 100%; object-fit: cover;
}
.cta-content {
  max-width: 850px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 3.5rem;
  margin-bottom: 24px;
  line-height: 1.2;
  letter-spacing: -1px;
}
.price-box {
  background: rgba(255, 255, 255, 0.08);
  padding: 48px;
  border-radius: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin: 48px auto;
  border: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 600px;
}
.discount-badge {
  display: inline-block;
  background: var(--accent-orange);
  color: white;
  padding: 10px 24px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 20px;
}
.price {
  margin-bottom: 20px;
}
.sale-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
}
.deadline {
  color: #f87171;
  font-weight: 600;
  font-size: 1.1rem;
}
.cta-buttons {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  padding: 40px 0;
  background: #020617;
  color: #64748b;
  font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-title { font-size: 3.2rem; }
  .problems-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .instructor-wrap { flex-direction: column; gap: 40px; }
  .review-carousel { grid-template-columns: 1fr; }
  .cta-content h2 { font-size: 2.5rem; }
}
@media (max-width: 768px) {
  .hero-title { font-size: 2.6rem; }
  .hero-subtitle { font-size: 1.15rem; }
  .section-header h2 { font-size: 2.2rem; }
  .instructor-info h2 { font-size: 2rem; }
  .btn-large { width: 100%; }
}