/*
 * WCCM Header — Site header and primary navigation.
 * ─────────────────────────────────────────────────────────────────────────────
 */

/* ── Site header ─────────────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  transition:
    background-color var(--duration-slow) var(--ease-in-out),
    border-color     var(--duration-slow) var(--ease-in-out),
    box-shadow       var(--duration-slow) var(--ease-in-out);
}

/* ── Transparent state (front page, before scroll) ───────────────────────── */
.site-header--transparent:not(.is-scrolled) {
  background-color: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
}

/* Logo mark */
.site-header--transparent:not(.is-scrolled) .site-header__logo-placeholder {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}
.site-header--transparent:not(.is-scrolled) .site-header__logo-mark {
  color: rgba(255, 255, 255, 0.9);
}

/* Logo wordmark */
.site-header--transparent:not(.is-scrolled) .site-header__logo-name {
  color: var(--color-white);
}
.site-header--transparent:not(.is-scrolled) .site-header__logo-sub {
  color: rgba(255, 255, 255, 0.65);
}

/* Nav links */
.site-header--transparent:not(.is-scrolled) .site-nav__menu a {
  color: rgba(255, 255, 255, 0.88);
}
.site-header--transparent:not(.is-scrolled) .site-nav__menu a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.1);
}
.site-header--transparent:not(.is-scrolled) .site-nav__menu .current-menu-item > a {
  color: var(--color-teal-light);
  background-color: rgba(26, 122, 114, 0.15);
}

/* Hamburger */
.site-header--transparent:not(.is-scrolled) .nav-toggle {
  border-color: rgba(255, 255, 255, 0.3);
}
.site-header--transparent:not(.is-scrolled) .nav-toggle__bar {
  background-color: var(--color-white);
}
.site-header--transparent:not(.is-scrolled) .nav-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* ── Scrolled state ───────────────────────────────────────────────────────── */
.site-header.is-scrolled {
  background-color: var(--color-white);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-8);
}

/* ── Brand / logo ────────────────────────────────────────────────────────── */
.site-header__brand {
  flex-shrink: 0;
}

.site-header__logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-header__logo-link img {
  height: 40px;
  width: auto;
}

/* ── Logo placeholder (shown until real logo is uploaded) ──────────────── */
.site-header__logo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-navy), var(--color-navy-light));
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.site-header__logo-mark {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  color: var(--color-teal-light);
  line-height: 1;
}

.site-header__logo-wordmark {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-left: var(--space-3);
}

.site-header__logo-name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--color-navy);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  transition: color var(--duration-slow) var(--ease-in-out);
}

.site-header__logo-sub {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-teal);
  line-height: 1;
  transition: color var(--duration-slow) var(--ease-in-out);
}

.site-header__site-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-navy);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
}

/* ── Primary navigation ──────────────────────────────────────────────────── */
.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.site-nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__menu li {
  position: relative;
}

.site-nav__menu a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-base);
  transition: color var(--duration-slow) var(--ease-in-out),
              background-color var(--duration-fast) var(--ease-in-out);
  white-space: nowrap;
}

.site-nav__menu a:hover,
.site-nav__menu .current-menu-item > a,
.site-nav__menu .current-page-ancestor > a {
  color: var(--color-navy);
  background-color: var(--color-gray-100);
}

.site-nav__menu .current-menu-item > a {
  color: var(--color-teal);
  font-weight: var(--weight-semibold);
}

/* Dropdown */
.site-nav__menu .sub-menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  list-style: none;
  z-index: var(--z-dropdown);
}

.site-nav__menu li:hover > .sub-menu,
.site-nav__menu li:focus-within > .sub-menu {
  display: block;
}

.site-nav__menu .sub-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-base);
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

/* ── Header actions ──────────────────────────────────────────────────────── */
.site-header__actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__cta {
  white-space: nowrap;
}

@media (max-width: 900px) {
  .site-header__cta {
    display: none;
  }
}

/* ── Hamburger toggle ────────────────────────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-in-out),
              background-color var(--duration-fast) var(--ease-in-out);
}

.nav-toggle:hover {
  background-color: var(--color-gray-100);
  border-color: var(--color-border-dark);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-in-out),
              opacity var(--duration-base) var(--ease-in-out),
              background-color var(--duration-slow) var(--ease-in-out);
}

/* Animated to X when open */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Responsive: mobile ──────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--space-6) var(--container-padding-x);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
    overflow-y: auto;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--duration-base) var(--ease-snappy),
                opacity var(--duration-base) var(--ease-in-out),
                visibility var(--duration-base);
  }

  .site-nav.is-open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav__menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .site-nav__menu li {
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav__menu a {
    width: 100%;
    padding: var(--space-4) var(--space-2);
    font-size: var(--text-base);
  }

  .site-nav__menu .sub-menu {
    display: block;
    position: static;
    box-shadow: none;
    border: none;
    background: var(--color-gray-50);
    border-radius: 0;
    padding-left: var(--space-4);
  }
}

@media (max-width: 480px) {
  .site-header__inner {
    gap: var(--space-4);
  }
}