/* ==========================================================================
   HEADER — Main Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Logo ───────────────────────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

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

.site-logo-text {
  display: flex;
  flex-direction: column;
}

.site-logo-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--color-primary);
  line-height: 1.2;
}

.site-logo-tagline {
  font-size: var(--fs-badge);
  color: var(--text-muted);
  font-style: italic;
}


/* ── Navigation ────────────────────────────────────────────────────────── */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

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

/* ── Dropdown ──────────────────────────────────────────────────────────── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: var(--space-2);
  background-color: var(--color-white);
  border: var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-fast);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-body-sm);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav-dropdown-item:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary);
}


/* ── Header Actions ────────────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}


/* ── Mobile Menu Toggle ────────────────────────────────────────────────── */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  border: none;
  padding: 0;
}

.menu-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: all var(--transition-base);
  position: relative;
}

.menu-toggle-bar::before,
.menu-toggle-bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: all var(--transition-base);
}

.menu-toggle-bar::before { top: -7px; }
.menu-toggle-bar::after  { bottom: -7px; }

.menu-toggle.is-active .menu-toggle-bar {
  background-color: transparent;
}

.menu-toggle.is-active .menu-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.is-active .menu-toggle-bar::after {
  bottom: 0;
  transform: rotate(-45deg);
}


/* ── Mobile Navigation ─────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    background-color: var(--color-white);
    border-top: var(--border);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
  }

  .nav-menu.is-open {
    transform: translateX(0);
  }

  .nav-link {
    padding: var(--space-4);
    font-size: var(--fs-body);
    border-radius: var(--radius-lg);
  }

  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding-left: var(--space-6);
    display: none;
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    display: block;
  }

  .header-actions .btn {
    display: none;
  }

  .header-inner {
    height: var(--header-height-mobile);
  }
}

/* ── Body offset for fixed header ──────────────────────────────────────── */
.admin-bar .site-header {
  top: 32px;
}

@media (max-width: 782px) {
  .admin-bar .site-header {
    top: 46px;
  }
}