/* Single source of truth for the top navigation. Loaded by every page. */
.vr-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid #E2E8F0;
  background: #FFFFFF;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, sans-serif;
}
.vr-nav .nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #0A2540;
}
.vr-nav .nav-brand .nm {
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -.02em;
  color: #0A2540;
}
.vr-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.vr-nav .nav-links a {
  text-decoration: none;
  color: #586677;
  font-size: 14px;
  font-weight: 500;
  transition: color .15s;
}
.vr-nav .nav-links a:hover { color: #0A2540; }
.vr-nav .btn-nav {
  background: #D4933A;
  color: #0A2540;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background .15s;
}
.vr-nav .btn-nav:hover { background: #E5A84C; }
/* ─── Mega-menu under "Learn" ─── */
.vr-nav .vr-nav-item { position: relative; display: inline-flex; align-items: center; }
.vr-nav .vr-nav-item > a { display: inline-flex; align-items: center; gap: 4px; }
.vr-nav .vr-caret { font-size: 10px; line-height: 1; color: #94A3B8; transition: transform .15s, color .15s; }
.vr-nav .vr-mega-open .vr-caret { transform: rotate(180deg); color: #0A2540; }
.vr-nav .vr-mega {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  box-shadow: 0 20px 50px -10px rgba(10,37,64,.18), 0 4px 12px rgba(10,37,64,.06);
  padding: 24px 28px 18px;
  min-width: 760px;
  z-index: 1000;
}
.vr-nav .vr-mega::before {
  content: '';
  position: absolute;
  top: -7px; left: 50%;
  width: 14px; height: 14px;
  background: #FFFFFF;
  border-left: 1px solid #E2E8F0;
  border-top: 1px solid #E2E8F0;
  transform: translateX(-50%) rotate(45deg);
}
.vr-mega-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.vr-mega-col h4 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #94A3B8;
  font-weight: 700;
}
.vr-mega-col ul { list-style: none; padding: 0; margin: 0; }
.vr-mega-col li { margin: 0; }
.vr-mega-col a {
  display: block;
  padding: 6px 8px;
  margin: 0 -8px;
  border-radius: 6px;
  color: #0A2540;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  line-height: 1.35;
  transition: background .12s, color .12s;
}
.vr-mega-col a:hover { background: #F4F6FA; color: #D4933A; }
.vr-mega-foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.vr-mega-all {
  color: #0A2540;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.vr-mega-all:hover { color: #D4933A; }
.vr-mega-search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #F4F6FA;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  color: #586677;
  cursor: pointer;
  font-family: inherit;
  transition: background .12s, color .12s;
}
.vr-mega-search:hover { background: #FFFFFF; color: #0A2540; border-color: #CBD5E1; }
.vr-mega-search kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 4px;
  padding: 1px 6px;
  color: #0A2540;
}

@media (max-width: 720px) {
  .vr-nav { padding: 14px 16px; }
  .vr-nav .nav-links { gap: 14px; }
  .vr-nav .nav-links a:not(.btn-nav):not(.vr-mega-all) { display: none; }
  .vr-nav .nav-links .vr-nav-item { display: inline-flex; }
  .vr-nav .nav-links .vr-nav-item > a { display: inline-flex; }
  .vr-nav .nav-links a[href="/faq"] { display: inline; }
  .vr-nav .vr-mega {
    position: fixed;
    top: 60px; left: 8px; right: 8px;
    transform: none;
    min-width: 0;
    padding: 16px;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
  .vr-nav .vr-mega::before { display: none; }
  .vr-mega-grid { grid-template-columns: 1fr; gap: 18px; }
  .vr-mega-foot { flex-direction: column; align-items: stretch; gap: 10px; }
  .vr-mega-search { justify-content: center; }
}