/* Intent-led navigation shared by the Vietnamese and English sites. */
.site-header[data-guided-nav="true"] .nav-links {
  gap: 4px;
}

.site-header[data-guided-nav="true"] .nav-links > li > a,
.nav-group-trigger {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--fg-soft);
  font: 500 .9rem/1 var(--f-body);
  white-space: nowrap;
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.site-header[data-guided-nav="true"] .nav-links > li > a:hover,
.site-header[data-guided-nav="true"] .nav-links > li > a[aria-current="page"],
.nav-group.is-current .nav-group-trigger,
.nav-group-trigger:hover,
.nav-group-trigger[aria-expanded="true"] {
  background: var(--bone);
  color: var(--ink);
}

.nav-group { position: relative; }
.nav-group-trigger > span {
  display: inline-block;
  color: var(--mint-deep);
  font-size: 1rem;
  transition: transform .22s var(--ease);
}
.nav-group-trigger[aria-expanded="true"] > span { transform: rotate(180deg); }

.nav-popover {
  position: absolute;
  z-index: 120;
  inset-block-start: calc(100% + 14px);
  inset-inline-start: 0;
  width: min(360px, calc(100vw - 32px));
  padding: 12px;
  border: 1px solid var(--hairline-2);
  border-radius: 20px;
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  box-shadow: 0 24px 60px rgba(16, 24, 32, .14);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-7px);
  transform-origin: top;
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.nav-group-end .nav-popover { inset-inline: auto 0; }
.nav-group.is-open .nav-popover {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.nav-popover > p,
.nav-mobile-groups section > p {
  margin: 3px 10px 8px;
  color: var(--fg-muted);
  font: 600 .67rem/1.2 var(--f-mono);
  letter-spacing: .14em;
  text-transform: uppercase;
}
.nav-popover > a {
  display: grid;
  gap: 4px;
  padding: 11px 12px;
  border-radius: 12px;
  color: var(--ink);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.nav-popover > a + a { border-top: 1px solid var(--hairline); }
.nav-popover > a:hover {
  background: var(--bone);
  transform: translateX(2px);
}
.nav-item-label { font-weight: 650; font-size: .9rem; }
.nav-popover small,
.nav-mobile-groups small {
  color: var(--fg-muted);
  font-size: .76rem;
  line-height: 1.4;
}

.nav-group-trigger:focus-visible,
.nav-popover a:focus-visible,
.nav-mobile-groups a:focus-visible,
.nav-mobile-language:focus-visible {
  outline: 2px solid var(--mint-deep);
  outline-offset: 2px;
}

.nav-mobile-groups,
.nav-mobile-actions { display: none; }

body.dark .nav-popover {
  background: rgba(15, 21, 28, .96);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .36);
}
body.dark .nav-group-trigger:hover,
body.dark .nav-group-trigger[aria-expanded="true"],
body.dark .nav-group.is-current .nav-group-trigger,
body.dark .nav-popover > a:hover { background: rgba(255,255,255,.07); }

@media (max-width: 1180px) and (min-width: 901px) {
  .site-header[data-guided-nav="true"] .brand-tag { display: none; }
  .site-header[data-guided-nav="true"] .nav-right { gap: 8px; }
  .site-header[data-guided-nav="true"] .nav-cta { padding-inline: 16px; }
  .site-header[data-guided-nav="true"] .nav-links > li > a,
  .site-header[data-guided-nav="true"] .nav-group-trigger { padding-inline: 10px; }
}

@media (max-width: 900px) {
  body.nav-open .cai-fab,
  body.nav-open .cai-panel,
  body.nav-open .to-top { display: none !important; }
  .site-header[data-guided-nav="true"] .mobile-menu {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-height: calc(100dvh - 82px);
    padding-block: 24px 28px;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .site-header[data-guided-nav="true"] .mobile-menu > ul,
  .site-header[data-guided-nav="true"] .mobile-menu > .btn { display: none; }
  .nav-mobile-groups {
    display: grid;
    gap: 24px;
  }
  .nav-mobile-groups section {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 18px;
  }
  .nav-mobile-groups section > p { grid-column: 1 / -1; margin-inline: 0; }
  .nav-mobile-groups a {
    display: grid;
    align-content: start;
    gap: 4px;
    min-height: 76px;
    padding: 12px 0;
    border-top: 1px solid var(--hairline);
    color: var(--ink);
  }
  .nav-mobile-groups .nav-item-label { font-size: .95rem; }
  .nav-mobile-groups small { max-width: 34ch; }
  .nav-mobile-actions {
    display: grid;
    gap: 12px;
    padding-top: 18px;
    border-top: 1px solid var(--hairline-2);
  }
  .nav-mobile-actions .btn {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    padding-block: 15px;
  }
  .nav-mobile-language {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 2px;
    color: var(--fg-muted);
    font-weight: 600;
  }
}

@media (max-width: 540px) {
  .nav-mobile-groups section { grid-template-columns: 1fr; }
  .nav-mobile-groups a { min-height: 0; }
  .site-header[data-guided-nav="true"] .mobile-menu { gap: 16px; padding-block-start: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  .nav-popover,
  .nav-group-trigger > span,
  .nav-popover > a { transition: none; }
}