/* qse-nav.css — Navigation (transparent-top / scrolled-solid) */

.qse-nav {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  transition: background 0.25s, box-shadow 0.25s;
}

/* dark-top pages: transparent at top, solid navy on scroll */
body.qse-page--dark-top .qse-nav { background: transparent; }
body.qse-page--dark-top .qse-nav.qse-nav--scrolled {
  background: var(--qse-bg-dark);
  box-shadow: 0 2px 16px rgba(10,20,35,0.45);
}

/* light-top pages: always solid navy (transparent would show white body) */
body.qse-page--light-top .qse-nav {
  background: var(--qse-bg-dark);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.qse-nav__inner {
  max-width: var(--qse-container-max);
  margin: 0 auto;
  padding: 0 var(--qse-section-pad-h);
  height: 68px;
  display: flex;
  align-items: center;
  gap: 0;
}

/* Logo */
.qse-nav__logo {
  flex-shrink: 0;
  margin-right: 40px;
  display: flex;
  align-items: center;
}
.qse-nav__logo img {
  height: 34px;
  width: auto;
  max-width: 160px;
}

/* Primary links */
.qse-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.qse-nav__link {
  font-family: var(--qse-font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  padding: 8px 12px;
  border-radius: var(--qse-radius-sm);
  transition: color 0.18s, background 0.18s;
  white-space: nowrap;
}
.qse-nav__link:hover {
  color: var(--qse-fg-on-dark-primary);
  background: rgba(255,255,255,0.06);
}

/* Dropdown */
.qse-nav__dropdown {
  position: relative;
}
.qse-nav__dropdown-toggle {
  background: transparent;
  border: none;
  font-family: var(--qse-font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  padding: 8px 12px;
  border-radius: var(--qse-radius-sm);
  transition: color 0.18s, background 0.18s;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  white-space: nowrap;
}
.qse-nav__dropdown-toggle:hover {
  color: var(--qse-fg-on-dark-primary);
  background: rgba(255,255,255,0.06);
}
.qse-nav__dropdown-toggle svg {
  transition: transform 0.2s;
  flex-shrink: 0;
}
.qse-nav__dropdown.is-open .qse-nav__dropdown-toggle {
  color: var(--qse-fg-on-dark-primary);
}
.qse-nav__dropdown.is-open .qse-nav__dropdown-toggle svg {
  transform: rotate(180deg);
}

.qse-nav__dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--qse-bg-dark);
  border: 1px solid var(--qse-border-on-dark);
  border-radius: var(--qse-radius-md);
  box-shadow: 0 8px 28px rgba(10,20,35,0.5);
  min-width: 200px;
  padding: 6px 0;
  z-index: 910;
}
.qse-nav__dropdown.is-open .qse-nav__dropdown-menu {
  display: block;
}
.qse-nav__dropdown-menu a {
  display: block;
  padding: 10px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  transition: color 0.15s, background 0.15s;
}
.qse-nav__dropdown-menu a:hover {
  color: var(--qse-fg-on-dark-primary);
  background: rgba(255,255,255,0.07);
}

/* CTAs */
.qse-nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex-shrink: 0;
}

.qse-nav__signin {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  padding: 8px 14px;
  border-radius: var(--qse-radius-sm);
  transition: color 0.18s, background 0.18s;
}
.qse-nav__signin:hover {
  color: var(--qse-fg-on-dark-primary);
  background: rgba(255,255,255,0.06);
}

/* Hamburger */
.qse-nav__hamburger {
  display: none;
  background: transparent;
  border: none;
  padding: 8px;
  color: var(--qse-fg-on-dark-primary);
  margin-left: auto;
  flex-direction: column;
  gap: 5px;
}
.qse-nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* Mobile menu */
.qse-nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--qse-bg-dark);
  border-top: 1px solid var(--qse-border-on-dark);
  padding: 12px 20px 20px;
}
.qse-nav__mobile.is-open { display: flex; }
.qse-nav__mobile a,
.qse-nav__mobile button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  cursor: pointer;
}
.qse-nav__mobile a:hover,
.qse-nav__mobile button:hover { color: var(--qse-fg-on-dark-primary); }
/* Mobile sub-menu toggle button */
.qse-nav__mobile-toggle {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--qse-fg-on-dark-secondary);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  cursor: pointer;
  font-family: var(--qse-font-sans);
}
.qse-nav__mobile-toggle:hover { color: var(--qse-fg-on-dark-primary); }

.qse-nav__mobile .qse-nav__mobile-sub {
  padding-left: 16px;
  border-left: 2px solid var(--qse-green-aa-dark);
  margin-top: 4px;
  display: none;
}
.qse-nav__mobile .qse-nav__mobile-sub.is-open { display: block; }
.qse-nav__mobile .qse-nav__mobile-sub a {
  font-size: 0.875rem;
}
.qse-nav__mobile-cta {
  margin-top: 16px;
}

@media (max-width: 968px) {
  .qse-nav__links,
  .qse-nav__actions { display: none; }
  .qse-nav__hamburger { display: flex; }
}