/* =============================================================================
   Header — Top navigation bar, mobile menu, brand
   ============================================================================= */

.site-header {
  background-color: var(--flavor-header-bg, var(--flavor-bg));
  border-bottom: var(--flavor-header-border, 1px) solid var(--flavor-border);
  z-index: 1000;
  transition: background-color var(--flavor-transition), box-shadow var(--flavor-transition);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--flavor-sp-lg);
  max-width: var(--flavor-wide-w);
  margin-inline: auto;
  padding: 0 var(--flavor-sp-md);
  height: var(--flavor-header-h);
}

/* ── Brand ────────────────────────────────────────────────────────────────── */
.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--flavor-sp-sm);
  flex-shrink: 0;
}

.site-header__brand .custom-logo {
  max-height: calc(var(--flavor-header-h) - 20px);
  max-width: var(--flavor-logo-w, 180px);
  width: auto;
  height: auto;
  object-fit: contain;
}

.site-header__title-link {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--flavor-secondary);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__title-link:hover {
  color: var(--flavor-primary);
}

.site-header__tagline {
  display: none;
  font-size: 0.75rem;
  color: var(--flavor-text-muted);
}

@media (min-width: 768px) {
  .site-header__tagline {
    display: block;
  }
}

/* ── Desktop Navigation ───────────────────────────────────────────────────── */
.site-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: var(--flavor-sp-xs);
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: block;
  padding: var(--flavor-sp-sm) var(--flavor-sp-md);
  font-size: var(--flavor-nav-fs, 15px);
  font-weight: 500;
  letter-spacing: var(--flavor-menu-ls, normal);
  text-transform: var(--flavor-menu-tt, none);
  color: var(--flavor-text);
  text-decoration: none;
  border-radius: 6px;
  transition: background-color var(--flavor-transition), color var(--flavor-transition);
  white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu .current-menu-item > a {
  background-color: var(--flavor-bg-alt);
  color: var(--flavor-primary);
}

/* Dropdown */
.nav-menu .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  inset-inline-start: 0;
  min-width: 200px;
  background: var(--flavor-surface);
  border: 1px solid var(--flavor-border);
  border-radius: var(--flavor-radius);
  box-shadow: var(--flavor-shadow-lg);
  padding: var(--flavor-sp-sm) 0;
  z-index: 100;
  list-style: none;
}

.nav-menu li:hover > .sub-menu {
  display: block;
}

.nav-menu .sub-menu a {
  padding: var(--flavor-sp-sm) var(--flavor-sp-lg);
  border-radius: 0;
}

.nav-menu .sub-menu .sub-menu {
  top: 0;
  inset-inline-start: 100%;
}

/* ── Header CTA ───────────────────────────────────────────────────────────── */
.site-header__cta {
  flex-shrink: 0;
}

.cta-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--flavor-sp-sm);
}

.cta-menu a {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: var(--flavor-primary);
  color: var(--flavor-text-inv);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background-color var(--flavor-transition);
}

.cta-menu a:hover {
  background: var(--flavor-primary-h);
  color: var(--flavor-text-inv);
}

/* ── Mobile Menu Toggle ───────────────────────────────────────────────────── */
.site-header__menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--flavor-sp-sm);
  cursor: pointer;
  z-index: 101;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--flavor-text);
  border-radius: 2px;
  transition: transform var(--flavor-transition), opacity var(--flavor-transition);
}

.site-header__menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.site-header__menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Responsive ────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .site-header__menu-toggle {
    display: flex;
  }

  .site-header__cta {
    display: none;
  }

  .site-nav {
    display: none;
    position: fixed;
    top: var(--flavor-header-h);
    inset-inline: 0;
    bottom: 0;
    background: var(--flavor-bg);
    z-index: 100;
    padding: var(--flavor-sp-lg);
    overflow-y: auto;
    flex-direction: column;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-menu a {
    padding: var(--flavor-sp-md);
    font-size: 1rem;
    border-bottom: 1px solid var(--flavor-border);
  }

  .nav-menu .sub-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-inline-start: var(--flavor-sp-lg);
    display: block;
  }
}