:root {
  --site-nav-height: 66px;
  --site-nav-accent: #4A90E2;
  --site-nav-accent-deep: #2E6DC2;
  --site-nav-ink: #111;
  --site-nav-muted: #444;
  --site-nav-bg: #fafbfc;
  --site-nav-border: rgba(74, 144, 226, 0.15);
  --site-nav-gutter: clamp(1.25rem, 4vw, 3.5rem);
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  min-height: var(--site-nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.05rem var(--site-nav-gutter);
  background: rgba(250, 251, 252, 0.95);
  border-bottom: 1px solid var(--site-nav-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-nav .nav-logo {
  display: block;
  flex: 0 0 auto;
  color: var(--site-nav-ink);
  text-decoration: none;
}

.site-nav .nav-logo-frame {
  width: 65px;
  height: 32px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav .nav-logo-frame img {
  width: auto;
  height: 150%;
  display: block;
}

.site-nav .nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.15rem, 2vw, 2rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav .nav-links a {
  color: var(--site-nav-muted);
  font: 400 clamp(.9rem, .25vw + .82rem, 1rem)/1.4 'Pretendard', sans-serif;
  letter-spacing: .02em;
  text-decoration: none;
  transition: color .2s;
}

.site-nav .nav-links a:hover { color: var(--site-nav-accent); }
.site-nav .nav-links .nav-for-teachers {
  color: #888;
  font-size: .9rem;
}

.site-nav .nav-links .nav-trial {
  color: var(--site-nav-accent);
  font-weight: 700;
}

.site-nav .nav-links .nav-member-login {
  color: var(--site-nav-accent-deep);
  font-weight: 750;
}

.site-nav .nav-links .nav-cta {
  display: inline-block;
  padding: .65rem 1.4rem;
  border-radius: 2rem;
  background: var(--site-nav-accent);
  color: #fff;
  font-size: .95rem;
  font-weight: 700;
}

.site-nav .nav-links .nav-cta:hover {
  background: var(--site-nav-accent-deep);
  color: #fff;
}

.site-nav .nav-toggle {
  display: none;
  position: relative;
  z-index: 101;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--site-nav-ink);
  font-size: 1.5rem;
  cursor: pointer;
}

body.legal-page .wrap { padding-top: calc(var(--site-nav-height) + 3rem); }

@media (max-width: 900px) {
  .site-nav { padding: 1rem 1.5rem; }
  .site-nav .nav-logo-frame {
    width: 110px;
    height: 32px;
    overflow: visible;
    flex-shrink: 0;
  }

  .site-nav .nav-logo-frame img {
    width: 104px;
    height: auto;
    display: block;
    transform: translate(-6px, 3px);
  }

  /* Hide the NADO logo while the mobile menu is open. */
  .site-nav:has(.nav-links.mobile-open) .nav-logo,
  .site-nav.menu-open .nav-logo {
    visibility: hidden !important;
    pointer-events: none;
  }

  .site-nav .nav-links { display: none; }
  .site-nav .nav-toggle { display: block; }
  .site-nav .nav-links.mobile-open {
    display: flex !important;
    position: fixed;
    inset: 0;
    z-index: 90;
    width: 100%;
    height: 100vh;
    padding: 6rem 2rem 2rem;
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--site-nav-bg);
  }
  .site-nav .nav-links.mobile-open li { border-bottom: 1px solid var(--site-nav-border); }
  .site-nav .nav-links.mobile-open li:has(.nav-trial) { margin-top: 1rem; border-bottom: 0; }
  .site-nav .nav-links.mobile-open li:last-child { margin-top: .75rem; border-bottom: 0; }
  .site-nav .nav-links.mobile-open a:not(.nav-cta) {
    display: block;
    padding: 1.4rem .2rem;
    color: var(--site-nav-ink);
    font-size: 1.15rem;
    font-weight: 700;
  }
  .site-nav .nav-links.mobile-open a.nav-for-teachers {
    color: #8b95a1;
    font-weight: 600;
  }
  .site-nav .nav-links.mobile-open a.nav-trial {
    padding: 1.05rem 1.2rem;
    border: 1.5px solid rgba(74, 144, 226, .3);
    border-radius: 999px;
    background: #fff;
    color: var(--site-nav-accent);
    text-align: center;
  }
  .site-nav .nav-links.mobile-open a.nav-member-login {
    color: var(--site-nav-accent-deep);
  }
  .site-nav .nav-links.mobile-open .nav-cta {
    display: block;
    padding: 1.2rem;
    text-align: center;
    font-size: 1.15rem;
  }
}

@media (max-width: 480px) {
  :root { --site-nav-gutter: 1.2rem; }
  .site-nav { padding-inline: var(--site-nav-gutter); }
}

/* Keep Korean words intact inside the homepage feature cards. */
.features-section .feature-title,
.features-section .feature-desc {
  min-width: 0;
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: normal;
  hyphens: none;
}

.features-section .feature-title {
  text-wrap: balance;
}

.features-section .feature-desc {
  text-wrap: pretty;
}

/* Mobile cards keep the same word-safe wrapping without overflowing. */
@media (max-width: 900px) {
  .features-section .feature-card {
    min-width: 0;
  }

  .features-section .feature-title,
  .features-section .feature-desc {
    width: 100%;
    max-width: 100%;
  }
}

@media(min-width:901px) { .site-nav .nav-links { gap:clamp(10px,1.3vw,22px); } .site-nav .nav-links a { font-size:13px; } }

.site-nav #navToggle {font-size:32px;width:44px;height:32px;min-width:0;min-height:0;line-height:32px;padding:0;}