/* content-header.css v1.0.0 */
/* グローバルヘッダー + モバイルメニュー */

.global-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.2s ease;
}

.global-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-landing);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 60px;
}

/* === Logo === */
.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.header-logo:hover {
  text-decoration: none;
}

.header-logo img {
  width: 28px;
  height: 28px;
}

/* === Desktop Navigation === */
.header-nav {
  display: none;
  align-items: center;
  gap: 4px;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}

.nav-dropdown-toggle:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-alt);
}

.nav-dropdown-toggle::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -2px;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  padding: 8px 0;
  margin-top: 4px;
  z-index: 200;
}

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

.nav-dropdown-menu a {
  display: block;
  padding: 10px 16px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: background 0.15s, color 0.15s;
}

.nav-dropdown-menu a:hover {
  background: var(--color-surface-alt);
  color: var(--color-text-primary);
  text-decoration: none;
}

/* === Header CTA === */
.header-cta {
  display: none;
}

.header-cta .btn-primary {
  padding: 8px 20px;
  font-size: var(--text-sm);
}

/* === Mobile Menu Toggle === */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s;
}

.menu-toggle:hover {
  background: var(--color-surface-alt);
}

.hamburger-icon {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

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

.menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

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

/* === Mobile Navigation === */
.mobile-nav {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  z-index: 99;
  overflow-y: auto;
  padding: 16px 0;
}

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

.mobile-nav-group {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-group:last-child {
  border-bottom: none;
}

.mobile-nav-label {
  display: block;
  padding: 8px 24px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mobile-nav a {
  display: block;
  padding: 12px 24px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-base);
  transition: background 0.15s, color 0.15s;
}

.mobile-nav a:hover {
  background: var(--color-surface-alt);
  color: var(--color-text-primary);
  text-decoration: none;
}

.mobile-nav-cta {
  padding: 16px 24px;
}

.mobile-nav-cta .btn-primary {
  width: 100%;
  justify-content: center;
  color: #FFFFFF; /* .mobile-nav a の詳細度に勝つため明示 */
}

.mobile-nav-cta .btn-primary:hover {
  color: #FFFFFF; /* 同上 */
}

/* === Language Switch === */
.lang-switch {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
}

.lang-switch a {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding: 4px 0;
}

/* === Desktop: Show nav, hide hamburger === */
@media (min-width: 1024px) {
  .header-nav {
    display: flex;
  }

  .header-cta {
    display: block;
  }

  .menu-toggle {
    display: none;
  }
}

@media (max-width: 767px) {
  .header-inner {
    height: 52px;
    padding: 0 var(--container-padding-mobile);
  }

  .mobile-nav {
    top: 52px;
  }
}