/* ============================================================
   マネサロ 公式サイト — ヘッダー & ナビ
   ============================================================ */

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 500;
  transition: background var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
}
.site-header.is-solid {
  background: rgba(250, 246, 239, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line-soft);
}

.header-inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 72px;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---- ロゴ ---- */
/* テキストワードマーク（正式ロゴ画像投入時は span を <img> に差し替えるだけ） */
.site-logo {
  display: flex; align-items: baseline; gap: 0.4rem;
  flex: none; margin-right: auto;
  text-decoration: none;
}
.site-logo-wordmark {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.04em;
  line-height: 1;
}
.site-logo-roman {
  font-family: var(--font-body);
  font-size: 0.62rem;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: lowercase;
}

/* ---- ナビ ---- */
.site-nav {
  display: flex; align-items: center; gap: 0.2rem;
}
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: var(--text-sm); font-weight: 500; letter-spacing: 0.04em;
  padding: 0.5rem 0.75rem;
  color: var(--ink);
  border-radius: var(--radius);
  transition: color var(--duration-fast), background var(--duration-fast);
}
.nav-link:hover { color: var(--terra); background: var(--rose-bg); }
.nav-caret {
  font-size: 0.55em; color: var(--ink-3);
  transition: transform var(--duration-fast);
}
.nav-item:hover .nav-caret,
.nav-item:focus-within .nav-caret { transform: rotate(180deg); }

/* メガメニュー */
.mega {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translate(-50%, 6px);
  width: min(680px, 90vw);
  background: var(--cream-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem 2rem;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              visibility 0s linear var(--duration-fast);
}
.mega.mega-sm { width: min(400px, 90vw); grid-template-columns: repeat(2, 1fr); }

.nav-item:hover .mega,
.nav-item:focus-within .mega {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translate(-50%, 0);
  transition-delay: 0s;
}

.mega-group-title {
  font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.12em; color: var(--terra);
  margin-bottom: 0.6rem;
}
.mega a {
  display: block; font-size: var(--text-sm);
  padding: 0.28rem 0; color: var(--ink-2);
  transition: color var(--duration-fast);
}
.mega a:hover { color: var(--ink); }
.mega-foot {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line-soft);
  padding-top: 0.8rem;
}
.mega-foot a { color: var(--terra); font-weight: 700; font-size: var(--text-sm); }

/* ---- ヘッダーCTA ---- */
.header-actions {
  display: flex; align-items: center; gap: 0.9rem; flex: none;
}
.login-link {
  font-size: var(--text-xs); letter-spacing: 0.08em;
  color: var(--ink-3);
  transition: color var(--duration-fast);
}
.login-link:hover { color: var(--ink); }

/* ---- ハンバーガー (モバイル) ---- */
.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--radius);
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
}
.menu-toggle:hover { background: var(--cream-dim); }
.menu-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); border-radius: 2px;
  transition: transform var(--duration) var(--ease-out),
              opacity var(--duration-fast);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- レスポンシブ ---- */
@media (max-width: 1023px) {
  .site-nav { display: none; }
  .menu-toggle { display: flex; }
  .login-link { display: none; }

  /* モバイルメニュー展開 */
  .site-nav.is-open {
    display: flex; flex-direction: column; align-items: flex-start; gap: 0;
    position: fixed; inset: 72px 0 0;
    background: var(--cream-2);
    overflow-y: auto;
    padding: 1.5rem var(--gutter) 3rem;
    z-index: 490;
  }
  .site-nav.is-open .nav-item { width: 100%; }
  .site-nav.is-open .nav-link { width: 100%; padding: 0.9rem 0; border-radius: 0; border-bottom: 1px solid var(--line-soft); }
  .site-nav.is-open .mega {
    position: static; transform: none; opacity: 1; visibility: visible;
    pointer-events: auto; box-shadow: none; border: none;
    background: var(--cream); width: 100%; grid-template-columns: 1fr;
    padding: 0.5rem 1rem; gap: 0.8rem;
    border-bottom: 1px solid var(--line-soft);
  }
  .site-nav.is-open .mega-foot { grid-column: auto; }
}