/* ============================================
   ヘッダー・ナビゲーション
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ── ロゴ ── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}
.site-logo__img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}
.site-logo__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
}
.site-logo__sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.site-logo:hover .site-logo__sub,
.site-logo:focus-visible .site-logo__sub {
  color: var(--color-primary);
}

/* ── デスクトップナビ ── */
.global-nav {
  display: none;
}
.global-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.global-nav__link {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.global-nav__link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}
.global-nav__link.active {
  color: var(--color-text);
  background: transparent;
}
.global-nav__link--cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  border-radius: var(--radius-pill);
  padding: 8px 18px;
}
.global-nav__link--cta:hover,
.global-nav__link--cta.active:hover {
  background: var(--color-primary-hover) !important;
}
.global-nav__link--cta.active {
  background: var(--color-primary) !important;
  color: var(--color-white) !important;
}

/* ── ハンバーガーボタン ── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.hamburger:hover { background: var(--color-primary-light); }
.hamburger__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(2) {
  opacity: 0;
}
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── モバイルドロワー ── */
.mobile-nav {
  position: fixed;
  inset: 70px 0 0 0;
  background: var(--color-white);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 99;
  padding: var(--sp-3) var(--container-padding) var(--sp-6);
}
.mobile-nav.open {
  transform: translateX(0);
}
.mobile-nav__list {
  display: flex;
  flex-direction: column;
}
.mobile-nav__link {
  display: flex;
  align-items: center;
  padding: var(--sp-2) var(--sp-1);
  font-size: var(--font-size-md);
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition);
}
.mobile-nav__link:hover,
.mobile-nav__link:focus-visible {
  color: var(--color-primary);
}
.mobile-nav__link.active {
  color: var(--color-text);
}
.mobile-nav__link--cta {
  margin-top: var(--sp-3);
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white) !important;
  border-radius: var(--radius-pill);
  border-bottom: none;
  padding: var(--sp-2) var(--sp-4);
}
.mobile-nav__link--cta:hover {
  background: var(--color-primary-hover);
}

/* オーバーレイ */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 70px 0 0 0;
  background: rgba(0,0,0,0.3);
  z-index: 98;
}
.nav-overlay.open { display: block; }

/* ── PC：ハンバーガー非表示・ナビ表示 ── */
@media (min-width: 768px) {
  .header-inner { height: 80px; }
  .global-nav   { display: block; }
  .hamburger    { display: none; }
  .site-logo__img { width: 44px; height: 44px; }
  .site-logo__name { font-size: 17px; }
  .site-logo__sub { font-size: 12px; }
}