/* =============================================================
   common.css — 全ページ共通スタイル
   amip-theme_v5
   ============================================================= */

/* ===== CSS 変数 ===== */
:root {
  --c-bg:           #f9f9f9;
  --c-bg-soft:      #efefee;
  --c-surface:      #ffffff;
  --c-text:         #282828;
  --c-text-muted:   #5c5c5c;
  --c-text-light:   #aeadac;
  --c-accent:       #575757;
  --c-accent-hot:   #f43838;
  --c-accent-warm:  #ff7373ae;
  --c-accent-ink:   #3c3c3c;
  --c-border:       #dcdcdb;
  --c-border-light: #eaeaea;
  --c-white:        #ffffff;
  --c-black:        #1a1a1a;
  --c-link:         #878df6;

  --font-heading: YakuHanMPs, 'Cormorant Garamond', serif;            /* 英語見出し・time専用 */
  --font-body:  YakuHanMPs, 'Noto Serif JP', serif;      /* 本文・日本語見出し */
  --font-sans:  YakuHanJPs, 'Lato', 'Noto Sans JP', sans-serif;

  --fs-logo-main:  2.6rem;
  --fs-logo-sub:   1rem;
  --fs-nav:        1.35rem;
  --fs-dropdown:   1.2rem;
  --fs-mobile-nav: 1.3rem;
  --fs-footer:     1.2rem;
  --fs-body:       1.5rem;
  --fs-label:      1.2rem;

  --header-h:    96px;
  --header-h-sm: 64px;

  --inner-max: 1100px;
  --inner-pad: 35px;

  --ease: 0.32s ease;

  --z-cookie:  2000;
  --z-header:  1060;
  --z-modal:   1070;
  --z-menu:    1055;   /* ヘッダー(1060)の直下、モーダル(1070)の下 */
  --z-overlay: 1040;
}

/* ===== リセット ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 62.5%; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  background: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.8;
}

/* menu-open / modal-open 時はスクロール禁止 */
body.menu-open,
body.modal-open { overflow: hidden; }

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* ===== Header ===== */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: var(--z-header);
  background: rgba(249, 249, 249, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: height var(--ease), border-color var(--ease),
              background var(--ease), box-shadow var(--ease);
}

/* スクロール縮小：PC のみ */
@media (min-width: 601px) {
  #header.is-scrolled {
    height: var(--header-h-sm);
    border-bottom-color: var(--c-border);
    box-shadow: 0 1px 12px rgba(40, 40, 40, 0.08);
  }
}
@media (max-width: 600px) {
  #header.is-scrolled {
    border-bottom-color: var(--c-border);
    box-shadow: 0 1px 8px rgba(40, 40, 40, 0.07);
  }
}

#header.is-menu-open {
  background: var(--c-bg);
  border-bottom-color: var(--c-border);
  /* メニュー開時：ドロワー(z-header-1)より確実に前面に出す */
  z-index: var(--z-header);
}

.header-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--inner-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ===== ロゴ ===== */
.logo {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 5px;
  transition: opacity var(--ease);
}
.logo:hover { opacity: 0.55; }

.logo-main,
h1.logo-main {
  font-family: var(--font-heading);
  font-size: var(--fs-logo-main);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.15em;
  color: var(--c-text);
  transition: font-size var(--ease);
}
.logo-sub {
  font-family: var(--font-sans);
  font-size: var(--fs-logo-sub);
  font-weight: 300;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--c-accent-hot);
  transition: opacity var(--ease);
}

@media (min-width: 601px) {
  #header.is-scrolled .logo-main,
  #header.is-scrolled h1.logo-main { font-size: 2rem; }
}

/* =============================================================
   統合ナビゲーション #site-nav
   ============================================================= */

/* ─── PC レイアウト ─────────────────────────────── */
@media (min-width: 601px) {

  /* header-inner と同じ max-width/margin:auto 構造で
     ウィンドウ幅が inner-max を超えても中央基準で右端に収まる */
  #site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    z-index: var(--z-header);
    pointer-events: none; /* ナビ以外の領域はクリックを透過 */
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 var(--inner-pad);
    max-width: var(--inner-max);
    margin: 0 auto;
    transition: height var(--ease);
  }
  #site-nav .nav-list {
    pointer-events: auto; /* ナビ本体はクリック可能に戻す */
  }

  /* スクロール縮小に追従 */
  #header.is-scrolled ~ #site-nav {
    height: var(--header-h-sm);
  }

  .nav-list {
    display: flex;
    align-items: center;
  }

  .nav-item { position: relative; }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 12px;
    font-size: var(--fs-nav);
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    position: relative;
    transition: color var(--ease);
  }

  /* ホバーアンダーライン */
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px; left: 12px; right: 12px;
    height: 1px;
    background: var(--c-accent);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--ease);
  }

  .nav-item:hover > .nav-link,
  .nav-item.is-current > .nav-link { color: var(--c-accent); }

  .nav-item:hover > .nav-link::after,
  .nav-item.is-current > .nav-link::after { transform: scaleX(1); }

  /* 最後のアイテムの右余白を詰める */
  .nav-list > .nav-item:last-child > .nav-link { padding-right: 4px; }

  /* 矢印 */
  .arrow {
    display: inline-block;
    width: 6px; height: 6px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform var(--ease);
  }
  .nav-item.has-dropdown:hover .arrow {
    transform: rotate(225deg) translateY(-2px);
  }

  /* ホバーギャップ対策（透明ブリッジ） */
  .nav-item.has-dropdown::after {
    content: '';
    position: absolute;
    top: 100%; left: 0; right: 0;
    height: 8px;
  }

  /* ─── ドロップダウン ─── */
  .dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    margin-top: 8px;
    min-width: 160px;
    background: rgba(246, 246, 245, 0.99);
    border: 1px solid var(--c-border);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--ease), transform var(--ease), visibility var(--ease);
  }
  .nav-item.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }
  .dropdown a {
    display: block;
    padding: 11px 22px;
    font-size: var(--fs-dropdown);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--c-text-muted);
    border-bottom: 1px solid var(--c-border);
    transition: color var(--ease), padding-left var(--ease), background var(--ease);
  }
  .dropdown li:last-child a { border-bottom: none; }
  .dropdown a:hover {
    color: var(--c-accent);
    padding-left: 28px;
    background: rgba(88, 88, 88, 0.04);
  }
}

/* ─── モバイル レイアウト ───────────────────────── */
@media (max-width: 600px) {

  /* ドロワーパネル本体
     #header(z:1060) の外にあるので stacking context が独立。
     z-index をヘッダーより低くすることでロゴ・ボタンが必ず前面に出る */
  #site-nav {
    display: block;
    position: fixed;
    top: 0;
    left: 0; right: 0;
    z-index: var(--z-menu); /* 1055 : ヘッダー(1060)より低い */
    padding-top: var(--header-h);
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
    max-height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateY(calc(-100% - var(--header-h)));
    transition: transform 0.44s ease;
  }

  #site-nav.is-open {
    transform: translateY(0);
  }

  .nav-list { display: block; }

  /* PC 用 arrow を非表示 */
  .arrow { display: none; }

  /* ドロップダウン：モバイルでは常時展開 */
  .dropdown {
    display: block !important;
    position: static;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    transform: none !important;
    min-width: auto;
    background: rgba(88, 88, 88, 0.04);
    border: none;
    margin: 0;
  }

  /* ─── Info・Link のラベル行 ─── */
  .nav-item.has-dropdown > .nav-link {
    display: block;
    padding: 0;
    pointer-events: auto;
  }
  .nav-item.has-dropdown > .nav-link .nav-text {
    display: block;
    padding: 14px 32px 8px;
    font-size: 1.0rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-accent-warm);
    border-bottom: 1px solid var(--c-border);
    transition: color var(--ease);
  }
  .nav-item.has-dropdown > .nav-link:hover .nav-text {
    color: var(--c-accent);
  }
  /* アンダーラインエフェクトを無効 */
  .nav-item.has-dropdown > .nav-link::after { display: none; }

  /* ─── 通常リンク（About / Portfolio / Contact） ─── */
  .nav-item:not(.has-dropdown) > .nav-link {
    display: block;
    padding: 15px 32px;
    font-size: var(--fs-mobile-nav);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-text);
    border-bottom: 1px solid var(--c-border);
    transition: color var(--ease), padding-left var(--ease);
  }
  .nav-item:not(.has-dropdown) > .nav-link::after { display: none; }
  .nav-item:not(.has-dropdown) > .nav-link:hover {
    color: var(--c-accent);
    padding-left: 40px;
  }

  /* ─── サブメニューリンク ─── */
  .dropdown a {
    display: block;
    padding: 12px 32px 12px 52px;
    font-size: var(--fs-mobile-nav);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--c-text-muted);
    border-bottom: 1px solid rgba(218, 216, 213, 0.5);
    transition: color var(--ease), padding-left var(--ease);
  }
  .dropdown li:last-child a { border-bottom: none; }
  .dropdown a:hover {
    color: var(--c-accent);
    padding-left: 60px;
  }

  /* Contact 直下の余白なし */
  .nav-list > .nav-item:last-child { margin-bottom: 0; }
}

/* ===== リサイズ中のチラつき防止 ===== */
#site-nav.no-transition { transition: none !important; }

/* ===== ハンバーガーボタン ===== */
#hamburger-btn {
  display: none; /* PC では非表示 */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 48px; height: 48px;
  background: none;
  border: none;
  -webkit-tap-highlight-color: transparent;
}
.ham-line {
  display: block;
  height: 1px;
  background: var(--c-text);
  transform-origin: center;
  transition: all 0.38s ease;
}
.ham-line:nth-child(1) { width: 26px; }
.ham-line:nth-child(2) { width: 18px; }
.ham-line:nth-child(3) { width: 26px; }

#hamburger-btn.is-open .ham-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg); width: 26px;
}
#hamburger-btn.is-open .ham-line:nth-child(2) {
  opacity: 0; width: 0;
}
#hamburger-btn.is-open .ham-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg); width: 26px;
}

/* ===== モバイルオーバーレイ ===== */
#mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.5);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}
#mobile-overlay.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ===== フッター ===== */
#footer {
  font-family: var(--font-sans);
  background: var(--c-black);
  color: rgba(255, 255, 255, 0.38);
  padding: 32px 0 28px;
}
.footer-inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  padding: 0 var(--inner-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copy { font-size: var(--fs-footer); letter-spacing: 0.12em; color: rgba(255, 255, 255, 0.6);}
.footer-links { display: flex; gap: 20px; align-items: center; }
.footer-links a {
  font-size: var(--fs-footer);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--ease);
}
.footer-links a:hover { color: rgba(255, 255, 255, 0.9); }
.footer-links a svg {
  width: 15px; height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  flex-shrink: 0;
}

/* ===== Back to Top ===== */
#back-to-top {
  position: fixed;
  bottom: 65px; right: 30px;
  z-index: 900;
  width: 30px; height: 30px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ease), background var(--ease), border-color var(--ease);
}
#back-to-top.is-visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { background: var(--c-black); border-color: var(--c-black); }
#back-to-top svg {
  width: 14px; height: 14px;
  stroke: var(--c-text);
  fill: none;
  stroke-width: 1.5;
  transition: stroke var(--ease);
}
#back-to-top:hover svg { stroke: var(--c-white); }

/* ===== Cookie バナー ===== */
#cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: var(--z-cookie);
  background: rgba(24, 24, 24, 0.97);
  color: rgba(255, 255, 255, 0.72);
  padding: 14px var(--inner-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}
#cookie-banner.is-visible { transform: translateY(0); }
.cookie-text {
  font-size: 1.2rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  flex: 1;
  min-width: 180px;
}
.cookie-text a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: underline;
  transition: color var(--ease);
}
.cookie-text a:hover { color: var(--c-white); }
.cookie-btns { display: flex; gap: 8px; flex-shrink: 0; }
.cookie-btn {
  padding: 7px 18px;
  font-size: 1.1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  color: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  border-radius: 3px;
  transition: opacity var(--ease);
}
.cookie-btn.is-accept {
  background: var(--c-accent-warm);
  border-color: var(--c-accent-warm);
  color: var(--c-white);
}
.cookie-btn:hover { opacity: 0.75; }

/* ===== ページ共通レイアウト ===== */
#main { padding-top: var(--header-h); }

.page-hero {
  padding: 56px var(--inner-pad) 48px;
  max-width: var(--inner-max);
  margin: 0 auto 56px;
  border-bottom: 1px solid var(--c-border);
}
.page-title {
  font-family: var(--font-heading);
  font-size: clamp(3.2rem, 6vw, 5.6rem);
  font-weight: 300;
  font-style: italic;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.inner {
  max-width: var(--inner-max);
  margin: 0 auto;
  padding: 0 var(--inner-pad);
}

/* ===== ボタン ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-sans);
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--c-accent);
  color: var(--c-accent);
  background: transparent;
  border-radius: 3px;
  transition: background var(--ease), color var(--ease);
}
.btn:hover { background: var(--c-accent); color: var(--c-white); }

.tag {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-sans);
  font-size: 1.0rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--c-bg-soft);
  color: var(--c-text-muted);
  border: 1px solid var(--c-border);
  border-radius: 3px;
}

/* ===== レスポンシブ ===== */
@media (max-width: 900px) {
  :root { --header-h: 84px; --header-h-sm: 60px; }
}

@media (max-width: 780px) {
  :root { --fs-logo-main: 2.2rem; }
  .nav-link {
    padding: 8px 10px;
    font-size: 1.2rem;
    letter-spacing: 0.13em;
  }
  .nav-list > .nav-item:last-child > .nav-link { padding-right: 2px; }
}

@media (max-width: 600px) {
  :root {
    --inner-pad:    22px;
    --header-h:     60px;
    --header-h-sm:  60px;
    --fs-logo-main: 2.0rem;
  }
  /* SP では高さ変化アニメーション不要 */
  #header {
    transition: border-color var(--ease), background var(--ease), box-shadow var(--ease);
  }

  #hamburger-btn { display: flex; }
  #mobile-overlay { display: block; }

  .page-hero   { padding: 36px var(--inner-pad) 32px; margin-bottom: 36px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }

  #back-to-top { bottom: 50px; right: 16px; width: 34px; height: 34px; }

  #cookie-banner { padding: 12px var(--inner-pad); }
  .cookie-btns   { width: 100%; justify-content: flex-end; }
}