/* ==============================================
   wa-header.css — ヘッダー・ナビゲーション
   ============================================== */

/* ==============================================
   サイトヘッダー
   ============================================== */
.site-header,
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.scrolled,
#header.scrolled {
  background: rgba(253, 251, 247, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom-color: var(--color-border);
}

/* ヘッダー分の余白を body に確保 */
body {
  padding-top: 72px;
}

/* ==============================================
   ヘッダーインナー
   ============================================== */
.wa-header-inner {
  max-width: var(--max-layout);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* ==============================================
   ロゴ
   ============================================== */
.wa-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  line-height: 1;
  flex-shrink: 0;
}

.wa-logo__ja {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.12em;
  line-height: 1.2;
}

.wa-logo__en {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 0.65rem;
  color: var(--color-muted);
  letter-spacing: 0.18em;
  margin-top: 2px;
}

.wa-logo:hover .wa-logo__ja {
  color: var(--color-primary);
}

/* ==============================================
   PC ナビゲーション
   ============================================== */
.wa-nav {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 32px;
}

.wa-nav__item {
  position: relative;
}

.wa-nav__link {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: 0.1em;
  padding: 4px 0;
  text-decoration: none;
  white-space: nowrap;
  position: relative; /* ::after の基準点を自身に固定 */
  border-bottom: none; /* Cocoon が付与する border-bottom を明示リセット */
}

/* Cocoon が自動付与する current 系クラスの下線をすべてリセット */
.wa-nav__item.current-menu-item > .wa-nav__link,
.wa-nav__item.current-menu-ancestor > .wa-nav__link,
.wa-nav__item.current-menu-parent > .wa-nav__link,
.wa-nav__item.current_page_item > .wa-nav__link,
.wa-nav__item.current_page_ancestor > .wa-nav__link {
  text-decoration: none;
  border-bottom: none;
}

.wa-nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

/* ホバー時のみ下線を表示 */
.wa-nav__link:hover {
  color: var(--color-primary);
}

.wa-nav__link:hover::after {
  transform: scaleX(1);
}

/* 現在ページ（JS が付与する .current クラス）は色変化のみ・下線なし */
.wa-nav__link.current {
  color: var(--color-primary);
}

/* 現在ページに下線も表示したい場合は以下のコメントを外す */
/* .wa-nav__link.current::after { transform: scaleX(1); } */

/* ==============================================
   ハンバーガーメニュー（スマホ用）
   ============================================== */
.wa-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 24px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.wa-hamburger__line {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.wa-hamburger[aria-expanded="true"] .wa-hamburger__line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.wa-hamburger[aria-expanded="true"] .wa-hamburger__line:nth-child(2) {
  opacity: 0;
}

.wa-hamburger[aria-expanded="true"] .wa-hamburger__line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ==============================================
   モバイルドロワー
   ============================================== */
.wa-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 99;
  overflow-y: auto;
  padding: 32px 24px 48px;
  opacity: 0;
  transform: translateX(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.wa-drawer.is-open {
  opacity: 1;
  transform: translateX(0);
}

.wa-drawer__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.wa-drawer__nav li {
  border-bottom: 1px solid var(--color-border);
}

.wa-drawer__nav a {
  display: block;
  padding: 16px 4px;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: 0.1em;
}

.wa-drawer__nav a:hover {
  color: var(--color-accent);
}

/* ==============================================
   レスポンシブ
   ============================================== */
@media (max-width: 1023px) {
  .wa-nav {
    display: none;
  }
  .wa-hamburger {
    display: flex;
  }
  .wa-drawer {
    display: block;
    pointer-events: none;
  }
  .wa-drawer.is-open {
    pointer-events: auto;
  }
}

@media (max-width: 767px) {
  .wa-header-inner {
    height: 60px;
    padding: 0 16px;
  }
  body {
    padding-top: 60px;
  }
  .wa-drawer {
    top: 60px;
  }
  .wa-logo__ja {
    font-size: 1.1rem;
  }
}