/*
 * site-header.css — 共通ヘッダー / グローバルナビ / SPハンバーガーメニュー（御家騒動 / A-GARTEN）
 *  assets/js/site-parts.js が生成するヘッダーHTML（#site-header に注入）に対応。
 *
 *  ページ固有で上書きしてよい項目（各ページの <style> に少量残す想定）:
 *   - .site-header の position/animation-delay（TOPはfixedビューポート想定でanimation-delay:1s、
 *     スクロールするページ（introduction等）は position:sticky; top:0 にして animation-delay を早める、等）
 */

/* ============ 共通ヘッダー ============ */
.site-header {
  position: relative;
  flex: 0 0 auto;
  width: 100%;
  height: 70px;
  background: rgba(15, 16, 12, 0.75);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 6vw;
  z-index: 100;
  opacity: 0;
  animation: paraFadeIn 0.8s ease forwards;
  animation-delay: 1s;
}
.header-left { display: flex; align-items: center; gap: clamp(14px, 2vw, 24px); }
.header-brand { display: flex; align-items: center; text-decoration: none; }
.header-brand img {
  display: block;
  height: 48px;
  width: auto;
  max-width: 30vw;
  transition: opacity 0.25s ease;
}
.header-brand:hover img { opacity: 0.75; }
.music-player { display: flex; align-items: center; gap: 15px; }
.play-btn {
  background: none; border: none; color: var(--paper);
  font-size: 16px; cursor: pointer; width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.3s ease, transform 0.2s ease;
}
.play-btn:hover { color: var(--gold); transform: scale(1.1); }
.volume-container { display: flex; align-items: center; gap: 8px; }
.volume-icon {
  font-size: 11px; color: var(--paper-dim);
  letter-spacing: 0.1em; user-select: none;
}
.volume-bar {
  -webkit-appearance: none; appearance: none;
  width: 80px; height: 2px;
  background: rgba(231, 224, 203, 0.2);
  border-radius: 2px; outline: none; cursor: pointer;
  transition: background 0.3s;
}
.volume-bar:hover { background: rgba(231, 224, 203, 0.4); }
.volume-bar::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--paper);
  transition: background 0.3s, transform 0.2s;
}
.volume-bar::-webkit-slider-thumb:hover { background: var(--gold); transform: scale(1.3); }

/* ============ ヘッダー：シェアメニュー ============ */
.header-right { display: flex; align-items: center; gap: 24px; }
.share-menu { display: flex; align-items: center; }
.share-toggle {
  background: none; border: none; color: var(--paper);
  width: 30px; height: 30px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.3s ease, transform 0.2s ease;
}
.share-menu:hover .share-toggle,
.share-menu:focus-within .share-toggle { color: var(--gold); transform: scale(1.1); }
.share-links {
  display: flex; gap: 16px; margin-right: 8px;
  max-width: 0; opacity: 0; overflow: hidden; white-space: nowrap;
  transition: max-width 0.5s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.35s ease;
}
.share-menu:hover .share-links,
.share-menu:focus-within .share-links { max-width: 240px; opacity: 1; }
.share-links a {
  font-family: 'Space Mono', monospace; font-size: 11px;
  letter-spacing: 0.15em; color: var(--paper-dim); text-decoration: none;
  transition: color 0.3s;
}
.share-links a:hover { color: var(--gold); }

/* ============ ヘッダー：グローバルナビ ============ */
.header-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  margin: 0 auto;
  padding: 0 20px;
  min-width: 0;
}
.hnav-item {
  position: relative;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
}
a.hnav-item:hover,
a.hnav-item:focus-visible { color: var(--gold); }
.hnav-item.soon {
  color: rgba(231, 224, 203, 0.3);
  cursor: default;
}
.hnav-item.current { color: var(--gold); }

/* coming soon の共通アニメーション設定 */
.hnav-item.soon::after,
a.hnav-item::after {
  position: absolute;
  top: 100%; left: 50%;
  transform: translate(-50%, 6px);
  font-size: 8px;
  letter-spacing: 0.2em;
  opacity: 0;
  white-space: nowrap;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* 準備中（soon）の場所には COMING SOON を指定 */
.hnav-item.soon::after {
  content: "COMING SOON";
  color: var(--gold);
}

/* リンク（aタグ）は data-en 属性で英字ラベルを個別指定 */
a.hnav-item::after {
  content: attr(data-en);
  color: var(--gold);
}

/* ホバー（マウスオーバー）した時に下からフワッと出す */
.hnav-item.soon:hover::after,
a.hnav-item:hover::after {
  opacity: 1;
  transform: translate(-50%, 3px);
}

/* 中間幅：ナビが窮屈にならないよう圧縮 */
@media (min-width: 901px) and (max-width: 1240px) {
  .site-header { padding: 0 3vw; }
  .header-nav { gap: 12px; padding: 0 12px; }
  .hnav-item { font-size: 10px; letter-spacing: 0.08em; }
  .header-right { gap: 16px; }
}

/* ============ SP：ヘッダー折返し ============ */
@media (max-width: 900px) {
  .site-header {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 4vw 0;
    row-gap: 2px;
    animation: none;
    opacity: 1;
  }
  .header-left { order: 1; gap: 12px; }
  .header-brand img { height: 36px; }
  .header-right { order: 2; margin-left: auto; gap: 14px; }
  .share-links { gap: 10px; }
  .header-nav {
    order: 3;
    width: 100%;
    margin: 0;
    padding: 6px 0 12px;
    gap: 18px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .header-nav::-webkit-scrollbar { display: none; }
  .hnav-item.soon::after { display: none; }
}

/* ============ SPハンバーガーメニュー ============ */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  margin-right: -8px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
}
.menu-toggle-bar {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--paper);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
body.menu-open .menu-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .menu-toggle-bar:nth-child(2) { opacity: 0; }
body.menu-open .menu-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.sp-menu {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(20px, 4.5vh, 34px);
  padding: 70px 10vw 40px;
  background: rgba(15, 16, 12, 0.96);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}
body.menu-open .sp-menu { opacity: 1; visibility: visible; }
body.menu-open .site-header { z-index: 300; }  /* 開いている間はヘッダーをメニューより手前に */
body.menu-open { overflow: hidden; }

.sp-menu-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  text-decoration: none;
}
.sp-menu-item .jp {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(22px, 6.5vw, 30px);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--paper);
  transition: color 0.3s ease;
}
.sp-menu-item.soon .jp { color: rgba(231, 224, 203, 0.35); }
.sp-menu-item .en {
  font-family: 'Space Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--gold);
  white-space: nowrap;
}
a.sp-menu-item:hover .jp,
a.sp-menu-item:focus-visible .jp { color: var(--gold); }

/* ============ SPオーバーレイ：SNS/SHARE行 ============ */
.sp-menu-share {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.sp-menu-share-label {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--paper-dim);
}
.sp-menu-share a {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.3s ease;
}
.sp-menu-share a:hover,
.sp-menu-share a:focus-visible { color: var(--gold); }

/* ============ SPオーバーレイ：カスケード登場演出 ============
   paraTextIn(easing: cubic-bezier(0.215, 0.610, 0.355, 1) / 0.1s刻みのdelay)を踏襲。
   body.menu-open が付いた瞬間だけ animation プロパティが生えるため、開くたびに毎回リスタートする。
   閉じる時はここで付けた transition が opacity/transform を一括で戻す（逆カスケードはしない）。 */
.sp-menu-item,
.sp-menu-share {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}
@keyframes spMenuCascade { to { opacity: 1; transform: translateX(0); } }
body.menu-open .sp-menu > *:nth-child(1) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.05s; }
body.menu-open .sp-menu > *:nth-child(2) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.15s; }
body.menu-open .sp-menu > *:nth-child(3) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.25s; }
body.menu-open .sp-menu > *:nth-child(4) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.35s; }
body.menu-open .sp-menu > *:nth-child(5) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.45s; }
body.menu-open .sp-menu > *:nth-child(6) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.55s; }
body.menu-open .sp-menu > *:nth-child(7) { animation: spMenuCascade 0.7s cubic-bezier(0.215, 0.610, 0.355, 1) forwards; animation-delay: 0.65s; }

/* モーション減設定への配慮：段差なしで即時表示 */
@media (prefers-reduced-motion: reduce) {
  .sp-menu-item,
  .sp-menu-share { transition: none; }
  body.menu-open .sp-menu > * {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 900px) {
  .header-nav { display: none; }        /* インラインのナビはハンバーガーに集約 */
  .menu-toggle { display: flex; }
  .music-player { display: none; }  /* SPではBGMプレイヤー非表示 */
  .site-header {                         /* ナビ折返しが無くなるので1段に戻す */
    flex-wrap: nowrap;
    height: 56px;
    padding: 0 4vw;
    row-gap: 0;
  }
}