/* FTN Platform Website — global navigation (AEB-09 §2) */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-white);
  border-bottom: 1px solid #ECECEC;
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-24);
  padding-block: var(--space-16);
}

.site-header__logo img {
  height: 32px;
  width: auto;
}

/* Desktop nav — hidden below tablet, shown at laptop+ */
.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: var(--space-8);
}

.site-nav__item {
  position: relative;
}

.site-nav__trigger {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 100%;
  padding: var(--space-8) var(--space-12);
  background: none;
  border: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-small-size);
  color: var(--color-black);
  border-radius: var(--radius-8);
  cursor: pointer;
}

.site-nav__trigger:hover,
.site-nav__item.is-open .site-nav__trigger {
  background: #F5F5F5;
}

.site-nav__trigger--link {
  text-decoration: none;
  color: var(--color-red);
}

.site-nav__trigger--link:hover {
  background: #FFF1F1;
}

.site-nav__trigger .chevron {
  width: 12px;
  height: 12px;
  transition: transform 0.15s ease;
}

.site-nav__item.is-open .chevron {
  transform: rotate(180deg);
}

.site-nav__dropdown {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-8));
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border: 1px solid #ECECEC;
  border-radius: var(--radius-12);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
}

.site-nav__item.is-open .site-nav__dropdown,
.site-nav__item:hover .site-nav__dropdown,
.site-nav__item:focus-within .site-nav__dropdown {
  display: block;
}

.site-nav__dropdown a {
  display: block;
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-8);
  font-size: var(--text-small-size);
  text-decoration: none;
  color: var(--color-charcoal);
}

.site-nav__dropdown a:hover {
  background: #F5F5F5;
  color: var(--color-black);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

/* Mobile menu toggle — visible below laptop breakpoint */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid #ECECEC;
  border-radius: var(--radius-8);
  cursor: pointer;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

/* Mobile nav panel */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 65px;
  z-index: 40;
  background: var(--color-white);
  overflow-y: auto;
  padding: var(--space-24) var(--grid-margin) var(--space-48);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav__section + .mobile-nav__section {
  margin-top: var(--space-24);
  padding-top: var(--space-24);
  border-top: 1px solid #ECECEC;
}

.mobile-nav__heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-body-size);
  margin-bottom: var(--space-12);
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.mobile-nav__links a {
  display: block;
  padding: var(--space-8) 0;
  color: var(--color-graphite);
  text-decoration: none;
  font-size: var(--text-small-size);
}

.mobile-nav__link--top {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-body-size);
  color: var(--color-red) !important;
}

.mobile-nav__actions {
  margin-top: var(--space-32);
}

.mobile-nav__actions .btn {
  width: 100%;
}

/* No-JS baseline: without JavaScript the toggle button is inert, so the mobile
   nav must remain reachable — show it inline, under the header, at narrow widths. */
.no-js .mobile-nav {
  display: block;
  position: static;
  padding-top: var(--space-16);
}

.no-js .nav-toggle {
  display: none;
}

@media (min-width: 1024px) {
  .site-nav {
    display: block;
  }

  .nav-toggle,
  .mobile-nav {
    display: none !important;
  }
}