:root {
  --bg: #0f141c;
  --bg-soft: #141b26;
  --bg-card: rgba(255, 255, 255, 0.025);
  --paper: #eef2f7;
  --paper-muted: #93a0b2;
  --gold: #5b9bd5;
  --gold-soft: rgba(91, 155, 213, 0.12);
  --line: rgba(238, 242, 247, 0.10);

  --font-display: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  --font-body: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--paper);
  font-family: var(--font-body);
  letter-spacing: -0.02em;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

/* Shared section heads */
.section-eyebrow {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
  text-align: center;
}
.section-title {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.25;
  word-break: keep-all;
}
.section-sub {
  text-align: center;
  color: var(--paper-muted);
  font-size: 1.05rem;
  margin-top: 1rem;
  margin-bottom: 3.5rem;
  word-break: keep-all;
}

/* Header */
.gnb {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(17, 22, 29, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.gnb-inner {
  max-width: 1120px; margin: 0 auto; padding: 16px 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.4rem; font-weight: 600;
  color: var(--paper); letter-spacing: 0;
}
.nav-links a {
  color: var(--paper); text-decoration: none;
  margin-left: 2rem; font-size: 1.15rem; opacity: 0.85; font-weight: 500;
  transition: opacity 0.25s, color 0.25s;
}
.nav-links a:hover { opacity: 1; color: var(--gold); }
.gnb-cta {
  margin-left: 2rem; padding: 10px 22px;
  border: 1px solid var(--gold); border-radius: 999px;
  color: var(--gold); text-decoration: none; font-size: 1.1rem; font-weight: 500;
  transition: background 0.25s, color 0.25s;
}
.gnb-cta:hover { background: var(--gold); color: var(--bg); }

@media (max-width: 760px) {
  .nav-links { display: none; }
}

/* Hero */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 120px 0 80px;
  background:
    radial-gradient(120% 80% at 80% 0%, rgba(91,155,213,0.10), transparent 60%),
    var(--bg);
}
.hero-eyebrow {
  font-size: 1.2rem; letter-spacing: 0.04em; font-weight: 500;
  color: var(--gold); margin-bottom: 1.6rem;
}
.hero-title {
  font-family: var(--font-display);
  font-size: 4rem; font-weight: 600; line-height: 1.18;
  margin-bottom: 1.8rem; word-break: keep-all;
}
.hero-title .accent { color: var(--gold); }
.hero-subtitle {
  font-size: 1.18rem; color: var(--paper-muted);
  max-width: 620px; word-break: keep-all; margin-bottom: 2.6rem;
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.3rem; margin-bottom: 1.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
}
.hero-cta {
  display: inline-block; padding: 16px 34px;
  background: var(--gold); color: var(--bg);
  text-decoration: none; font-weight: 600; font-size: 1.05rem;
  border-radius: 6px; transition: transform 0.25s, box-shadow 0.25s;
}
.hero-cta:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(91,155,213,0.25); }

/* Webinar Pill Notification */
.webinar-pill {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 32px; margin-bottom: 1.8rem;
  background: #ffffff; border: 1px solid #ffffff;
  border-radius: 999px; color: var(--bg); font-size: 1.15rem; font-weight: 600;
  text-decoration: none; transition: all 0.3s ease;
  box-shadow: 0 8px 25px rgba(255,255,255,0.2);
  animation: heroFadeUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both !important;
}
.webinar-pill:hover {
  background: #f0f4f8; transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(255,255,255,0.3); color: #000;
}
.webinar-pill strong { color: var(--gold); margin-right: 6px; font-weight: 800; }

/* For You Section (Pain Points) */
.for-you-section { padding: 130px 0 80px; background: var(--bg); text-align: center; }
.chat-container { display: flex; flex-direction: column; gap: 16px; max-width: 680px; margin: 0 auto; }
.chat-bubble {
  padding: 20px 26px; border-radius: 12px; font-size: 1.05rem; line-height: 1.5; color: #fff; word-break: keep-all; text-align: left;
  border: 1px solid rgba(255,255,255,0.08); background: rgba(255,255,255,0.03); max-width: 85%;
  font-weight: 300;
}
.chat-bubble.left { align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-bubble.right { align-self: flex-end; border-bottom-right-radius: 4px; background: rgba(91,155,213,0.08); border-color: rgba(91,155,213,0.2); }
@media (max-width: 768px) {
  .chat-bubble { font-size: 0.95rem; padding: 16px 20px; max-width: 90%; }
}

/* Global Fade & Entrance Animations */
.fade-text {
  opacity: 0; transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.fade-text.visible {
  opacity: 1; transform: translateY(0);
}

@keyframes heroFadeUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}
.hero-eyebrow { animation: heroFadeUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both; }
.hero-title { animation: heroFadeUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.3s both; }
.hero-subtitle { animation: heroFadeUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.5s both; }
.hero-cta { animation: heroFadeUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) 0.7s both; }

/* Staggered children when parent is visible */
.fade-text.visible > *:nth-child(1) { animation: heroFadeUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both; }
.fade-text.visible > *:nth-child(2) { animation: heroFadeUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) 0.25s both; }
.fade-text.visible > *:nth-child(3) { animation: heroFadeUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) 0.4s both; }
.fade-text.visible > *:nth-child(4) { animation: heroFadeUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) 0.55s both; }

/* Value Proposition */
.value-prop {
  padding: 150px 0; background: var(--bg-soft); overflow: hidden;
}
.value-prop-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.value-chart {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 16px; padding: 40px;
}
.chart-label {
  font-family: var(--font-display); font-size: 1.05rem; font-weight: 500;
  margin-bottom: 0.8rem;
}
.chart-bar-bg {
  width: 100%; height: 12px; background: rgba(255,255,255,0.05);
  border-radius: 999px; overflow: hidden;
}
.chart-bar {
  height: 100%; width: 0; border-radius: 999px; transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.bar-vod { background: var(--paper-muted); }
.bar-tutors { background: var(--gold); box-shadow: 0 0 12px rgba(91,155,213,0.6); }

/* Social Proof */
.social-proof { padding: 130px 0; background: var(--bg); overflow: hidden; }
.reviews-swiper { padding-bottom: 60px; overflow: visible; margin-top: 1rem; }
.review-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 16px; height: 100%; min-height: 240px;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: transform 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}
.review-card:hover { transform: translateY(-5px); border-color: rgba(91,155,213,0.3); }
.review-content { padding: 2.5rem; }
.review-thumb { width: 100%; height: 200px; overflow: hidden; border-bottom: 1px solid var(--line); }
.review-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; pointer-events: none; user-select: none; -webkit-user-drag: none; }
.review-card:hover .review-thumb img { transform: scale(1.05); }
.review-text {
  font-size: 1.15rem; color: var(--paper); line-height: 1.6; margin-bottom: 2rem;
  word-break: keep-all; font-style: italic; opacity: 0.9;
}
.review-author {
  font-family: var(--font-display); color: var(--gold); font-size: 0.95rem; font-weight: 600;
}


/* Differentiators */
.diff { padding: 130px 0; }
.diff-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.diff-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 14px; padding: 40px 32px;
}
.diff-num {
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--gold); display: block; margin-bottom: 1.2rem;
}
.diff-card h3 {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.45rem; line-height: 1.35; margin-bottom: 1rem;
  word-break: keep-all;
}
.diff-card p { color: var(--paper-muted); font-size: 1rem; word-break: keep-all; }

/* Program timeline */
.program { padding: 130px 0; }
.timeline-container {
  position: relative; max-width: 600px; margin: 0 auto; padding-left: 44px;
}
.timeline-line {
  position: absolute; top: 6px; left: 10px; width: 2px; height: 100%;
  background: var(--line);
}
.timeline-progress {
  position: absolute; top: 6px; left: 10px; width: 2px; height: 0;
  background: var(--gold); transition: height 0.15s ease;
  box-shadow: 0 0 12px rgba(91,155,213,0.5);
}
.timeline-item {
  position: relative; margin-bottom: 56px;
  opacity: 0.4; transition: opacity 0.35s ease;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item.active { opacity: 1; }
.timeline-dot {
  position: absolute; top: 6px; left: -39px;
  width: 12px; height: 12px; border-radius: 50%;
  background: rgba(238,242,247,0.2); z-index: 2;
  transition: background 0.35s, box-shadow 0.35s;
}
.timeline-item.active .timeline-dot {
  background: var(--gold); box-shadow: 0 0 14px rgba(91,155,213,0.6);
}
.timeline-content h3 {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.35rem; margin-bottom: 0.4rem;
}
.timeline-content p { color: var(--paper-muted); font-size: 1.05rem; }
.trio {
  display: inline-block; margin-left: 6px;
  font-size: 0.78rem; color: var(--gold);
  border: 1px solid var(--gold-soft); background: var(--gold-soft);
  padding: 2px 10px; border-radius: 999px;
}

/* Pricing */
.lineup { padding: 130px 0; background: var(--bg-soft); }
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; align-items: stretch;
}
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 16px; padding: 44px 30px;
  display: flex; flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease;
  position: relative;
}
.pricing-card:hover { transform: translateY(-8px); border-color: rgba(91,155,213,0.35); }
.pricing-card.highlighted {
  border: 1px solid var(--gold);
  background: linear-gradient(180deg, var(--gold-soft), var(--bg-card));
}
.badge {
  position: absolute; top: 24px; right: 24px;
  background: var(--gold); color: var(--bg);
  padding: 5px 14px; font-size: 0.75rem; font-weight: 700;
  border-radius: 999px; letter-spacing: 0.02em; white-space: nowrap;
  z-index: 2;
}
.tier-name {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.55rem; margin-bottom: 0.8rem;
}
.tier-desc { color: var(--paper-muted); font-size: 0.98rem; margin-bottom: 1.6rem; word-break: keep-all; }
.tier-feat { list-style: none; margin-bottom: 2rem; flex-grow: 1; }
.tier-feat li {
  font-size: 0.95rem; padding: 7px 0 7px 22px; position: relative;
  border-bottom: 1px solid var(--line); color: var(--paper);
}
.tier-feat li:before {
  content: "—"; position: absolute; left: 0; color: var(--gold);
}
.tier-price {
  font-family: var(--font-display); font-size: 2.4rem; font-weight: 600;
  margin-bottom: 1.6rem;
}
.tier-price span { font-size: 1rem; font-family: var(--font-body); color: var(--paper-muted); margin-left: 4px; }
.tier-price.quote { font-size: 1.7rem; color: var(--gold); }
.tier-btn {
  display: block; text-align: center; padding: 13px;
  border: 1px solid var(--gold); border-radius: 8px;
  color: var(--gold); text-decoration: none; font-weight: 600;
  transition: background 0.25s, color 0.25s;
}
.tier-btn:hover, .tier-btn.solid { background: var(--gold); color: var(--bg); }
.tier-btn.solid:hover { background: #76aede; }

/* Tutors */
.tutors { padding: 130px 0; background: var(--bg-soft); }
.tutor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.tutor-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 14px; padding: 36px; text-align: center;
}
.tutor-avatar {
  width: 88px; height: 88px; border-radius: 50%; margin: 0 auto 1.4rem;
  background: linear-gradient(135deg, rgba(91,155,213,0.25), rgba(238,242,247,0.06));
  border: 1px solid var(--gold-soft);
}
.tutor-card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.3rem; margin-bottom: 0.5rem; }
.tutor-tag { color: var(--paper-muted); font-size: 0.92rem; }

/* CTA */
.cta {
  padding: 150px 0;
  background:
    radial-gradient(100% 80% at 50% 100%, rgba(91,155,213,0.12), transparent 60%),
    var(--bg);
}
.cta-headline {
  font-family: var(--font-display); font-weight: 600;
  font-size: 2.8rem; line-height: 1.3; margin-bottom: 1.2rem; word-break: keep-all;
}
.cta-sub { color: var(--paper-muted); font-size: 1.15rem; margin-bottom: 2.6rem; }
.cta-btn {
  display: inline-block; background: var(--gold); color: var(--bg);
  padding: 18px 40px; font-size: 1.15rem; font-weight: 700;
  text-decoration: none; border-radius: 8px;
  transition: transform 0.25s, box-shadow 0.25s;
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(91,155,213,0.3); }
.cta-note { color: var(--paper-muted); font-size: 0.88rem; margin-top: 1.6rem; }

/* Footer */
.footer { padding: 50px 0; border-top: 1px solid var(--line); text-align: center; }
.footer p { font-family: var(--font-display); font-size: 1.1rem; }
.footer-muted { font-family: var(--font-body); color: var(--paper-muted); font-size: 0.88rem; margin-top: 0.4rem; }

/* Responsive */
@media (max-width: 860px) {
  .value-prop-grid { grid-template-columns: 1fr; gap: 40px; }
  .diff-grid, .pricing-grid, .tutor-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.8rem; }
  .section-title { font-size: 2rem; }
  .cta-headline { font-size: 2rem; }
  .pricing-card.highlighted { order: -1; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto; }
  .mission-text { opacity: 1; }
}