/* ============================================
   layout.css　ヘッダー・フッターのスタイル
   ============================================ */

/* ---------- ヘッダー ---------- */
/* トップページではHero写真の上に透明で乗る。
   スクロールすると背景が出てくる（js/common.jsで制御）。
   下層ページでは最初から背景あり。 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.site-header.is-scrolled,
.site-header.is-subpage {
  background-color: rgba(250, 247, 240, 0.95);
  backdrop-filter: blur(6px);
  border-bottom-color: var(--color-border-soft);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

/* ロゴ：細いスペーシング広めの書体（nocikosho参考） */
.site-logo .en {
  font-family: var(--font-logo);
  font-size: 1.1rem;
  font-weight: 400;
  font-style: normal;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: #fff;
  transition: color 0.4s ease;
}

.site-header.is-scrolled .site-logo .en,
.site-header.is-subpage .site-logo .en {
  color: var(--color-text);
}

.site-logo .jp {
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.7);
  margin-top: 3px;
  transition: color 0.4s ease;
}

.site-header.is-scrolled .site-logo .jp,
.site-header.is-subpage .site-logo .jp {
  color: var(--color-text-faint);
}

.site-nav {
  display: flex;
  gap: var(--space-md);
}

.site-nav a {
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.9);
  transition: color 0.2s ease;
  position: relative;
  padding-bottom: 3px;
}

/* ホバーで下線がすーっと伸びる */
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
  border-radius: 1px;
}

.site-nav a:hover::after { transform: scaleX(1); }

.site-header.is-scrolled .site-nav a,
.site-header.is-subpage .site-nav a {
  color: var(--color-text-soft);
}

.site-nav a:hover {
  color: #fff;
}

.site-header.is-scrolled .site-nav a:hover,
.site-header.is-subpage .site-nav a:hover {
  color: var(--color-text);
}

/* ハンバーガーメニュー */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
}

.nav-toggle span {
  height: 1.5px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
  transition: background 0.4s ease;
}

.site-header.is-scrolled .nav-toggle span,
.site-header.is-subpage .nav-toggle span {
  background: var(--color-text);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-bottom: 1px solid var(--color-border-soft);
  }

  .site-nav.is-open {
    max-height: 480px;
  }

  .site-nav a,
  .site-header.is-scrolled .site-nav a,
  .site-header.is-subpage .site-nav a {
    color: var(--color-text-soft);
    padding: 1rem var(--space-sm);
    border-bottom: 1px solid var(--color-border-soft);
  }
}

/* ---------- フッター ---------- */
.site-footer {
  background-color: var(--color-bg-soft);
  padding: var(--space-lg) 0 var(--space-md);
  margin-top: var(--space-xl);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-sm);
}

.footer-logo {
  font-family: var(--font-logo);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  font-style: normal;
}

.footer-sns a {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--color-text-soft);
  font-size: 0.85rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  font-size: 0.82rem;
  color: var(--color-text-soft);
}

.footer-copy {
  font-size: 0.72rem;
  color: var(--color-text-faint);
  margin-top: var(--space-sm);
}