:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5f6b82;
  --primary: #0f5ccf;
  --border: #d8e0ed;
}

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

body {
  font-family: 'Pretendard', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  text-decoration: none;
  color: #153d7a;
  font-weight: 800;
  font-size: 1.4rem;
}

.logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

main {
  height: calc(100vh - 72px);
  overflow: hidden;
}

/* Buttons */
.btn {
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #1f74ef, #0f5ccf);
  color: #fff;
  box-shadow: 0 10px 20px -12px rgba(15, 92, 207, 0.6);
}

.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.landing-stage {
  position: relative;
  height: 100%;
  color: #f7fbff;
  overflow: hidden;
}

.landing-bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1479839672679-a46483c0e7c8?auto=format&fit=crop&w=2400&q=80');
  background-size: cover;
  background-position: center 44%;
  transform: scale(1.01);
}

.landing-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 20, 44, 0.28) 0%, rgba(8, 20, 44, 0.48) 100%);
}

.landing-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
  padding-top: 28px;
  padding-bottom: 28px;
}

.slide-shell {
  width: min(1040px, 100%);
  margin: 0 auto;
  overflow: hidden;
}

.slide-track {
  display: flex;
  width: 100%;
  transition: transform 420ms ease;
}

.intro-slide {
  flex: 0 0 100%;
  width: 100%;
  min-height: min(640px, calc(100vh - 180px));
  padding: clamp(10px, 2vw, 22px);
  color: #f8fbff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.intro-slide h1 {
  font-size: clamp(2.4rem, 8vw, 5.2rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin-top: 4px;
  color: #ffffff;
  text-shadow: 0 8px 24px rgba(18, 40, 80, 0.22);
}

.intro-slide h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.22;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 6px 20px rgba(18, 40, 80, 0.22);
}

.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(231, 241, 255, 0.94);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-kicker {
  margin-top: 0;
  font-size: 1rem;
  color: rgba(236, 244, 255, 0.95);
}

.hero-sub,
.slide-desc,
.slide-lead {
  margin-top: 16px;
  font-size: 1.08rem;
  color: rgba(236, 244, 255, 0.92);
  max-width: 760px;
}

.slide-lead {
  font-weight: 700;
  color: #ffffff;
}

.hero-cta {
  margin-top: 24px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-cta .btn-primary {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.98);
  color: #1a3d83;
}

.hero-cta .btn-primary:hover {
  background: #ffffff;
  color: #1a3d83;
}

.hero-cta .btn-outline {
  border-color: rgba(255, 255, 255, 0.9);
  color: #ffffff;
  background: rgba(18, 45, 96, 0.36);
}

.hero-cta .btn-outline:hover {
  background: rgba(18, 45, 96, 0.5);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
  margin-top: 20px;
  text-align: left;
  width: min(820px, 100%);
}

.feature {
  background: transparent;
  border: none;
  border-left: 2px solid rgba(255, 255, 255, 0.62);
  border-radius: 0;
  padding: 2px 0 2px 14px;
  backdrop-filter: none;
}

.feature h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.35;
}

.feature p {
  margin-top: 6px;
  color: rgba(237, 243, 255, 0.9);
  font-size: 0.96rem;
}

.slide-btn {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.84);
  color: #1d3f86;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  z-index: 4;
}

.slide-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.slide-btn.side {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.slide-btn.side-left {
  left: 24px;
}

.slide-btn.side-right {
  right: 24px;
}

.slide-indicator {
  position: absolute;
  left: 50%;
  bottom: 64px;
  transform: translateX(-50%);
  min-width: 92px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
  text-shadow: 0 3px 10px rgba(14, 26, 54, 0.24);
  z-index: 4;
}

.landing-footer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 4;
  background: rgba(8, 20, 44, 0.46);
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(6px);
}

.landing-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  justify-content: center;
  gap: 8px;
  align-items: center;
}

.landing-footer p {
  color: rgba(241, 246, 255, 0.9);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  white-space: normal;
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  display: none;
}

@media (max-width: 900px) {
  main {
    height: calc(100vh - 72px);
  }

  .landing-inner {
    padding-top: 14px;
    padding-bottom: 64px;
  }

  .intro-slide h1 {
    font-size: 2.2rem;
  }

  .hero-kicker,
  .hero-sub,
  .slide-desc,
  .slide-lead {
    font-size: 0.9rem;
  }

  .intro-slide {
    min-height: min(620px, calc(100vh - 210px));
    padding: 10px 8px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .intro-slide h2 {
    font-size: 1.45rem;
  }

  .slide-btn {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  .slide-btn.side-left {
    left: 10px;
  }

  .slide-btn.side-right {
    right: 10px;
  }

  .slide-indicator {
    bottom: 54px;
    font-size: 0.82rem;
  }

  .landing-footer-inner {
    padding: 8px 12px;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 0;
  }

  .landing-footer p {
    font-size: 0.7rem;
  }
}

.forbidden-public {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.forbidden-box {
  text-align: center;
  background: #fff;
  padding: 48px;
  border-radius: 16px;
  max-width: 420px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.forbidden-box .icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.forbidden-box h1 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.forbidden-box p {
  color: #666;
  line-height: 1.6;
}

.forbidden-box .actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  justify-content: center;
}