/* ==========================================================================
   Primary Navigation Component
   ========================================================================== */

.primary-nav {
  position: relative;
  background-color: transparent;
  transition: background-color var(--transition-base);
}

.primary-nav::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: var(--color-white);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

/* Scrolled state */
.header.is-scrolled .primary-nav::before {
  opacity: 1;
}

.primary-nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.primary-nav__logo-wrapper {
  position: relative;
  z-index: 1;
}

.primary-nav__logo-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 180px;
  height: 80px;
  background-color: var(--color-white);
  border-radius: 0 0 60% 60% / 0 0 100% 100%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: -1;
  transition: opacity var(--transition-base);
}

.header.is-scrolled .primary-nav__logo-bg {
  opacity: 0;
}

.primary-nav__logo {
  display: block;
  height: 48px;
  width: auto;
}

.primary-nav__logo-link:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* Desktop Menu */
.primary-nav__menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .primary-nav__menu {
    display: flex;
    align-items: center;
  }
}

.primary-nav__item {
  position: relative;
}

/* Nav item trigger */
.nav-item__trigger,
.nav-item__trigger:visited {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-navy);
  text-decoration: none;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.nav-item__trigger:hover {
  background-color: var(--color-blue-light);
  color: var(--color-blue);
}

.nav-item__trigger:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-shadow);
}

.nav-item__trigger[aria-current="page"],
.nav-item__trigger.is-active {
  color: var(--color-blue);
  background-color: var(--color-blue-light);
}

.nav-item__icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.primary-nav__item[aria-expanded="true"] .nav-item__icon {
  transform: rotate(180deg);
}

/* ==========================================================================
   Dropdown Menu
   ========================================================================== */

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.primary-nav__item[aria-expanded="true"] .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.nav-dropdown__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Subnav link */
.subnav-link,
.subnav-link:visited {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.subnav-link:hover {
  background-color: var(--color-blue-light);
  color: var(--color-blue);
}

.subnav-link:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--color-blue);
  background-color: var(--color-blue-light);
}

.subnav-link[aria-current="page"],
.subnav-link.is-active {
  background-color: var(--color-blue);
  color: var(--color-white);
}

.subnav-link[aria-current="page"]:hover,
.subnav-link.is-active:hover {
  background-color: var(--color-blue-dark);
}

.subnav-link__title {
  display: block;
  font-weight: var(--font-weight-medium);
}

.subnav-link__description {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.subnav-link:hover .subnav-link__description,
.subnav-link.is-active .subnav-link__description {
  color: inherit;
  opacity: 0.8;
}

/* ==========================================================================
   Mobile Menu Button
   ========================================================================== */

.mobile-menu-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--color-navy);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: var(--color-gray-100);
}

.mobile-menu-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-shadow);
}

.mobile-menu-btn__icon {
  width: 24px;
  height: 24px;
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}