/* ============================================================
   layout.css — ヘッダー / フッター / ナビゲーション
   ============================================================ */

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--header-h);
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(123, 102, 96, 0.1);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* Logo */
.site-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1;
  text-decoration: none;
  color: inherit;
  gap: 2px;
  flex-shrink: 0;
}

.site-logo__en {
  font-family: 'Lato', var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-heading);
  line-height: 1;
}

.site-logo__ja {
  font-family: var(--font-serif);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--color-text);
  line-height: 1;
}

.site-logo:hover {
  opacity: 0.8;
}

.site-logo__img {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0;
}

.site-nav__link {
  display: block;
  padding: 8px 14px;
  font-size: 13.5px;
  font-family: var(--font-serif);
  letter-spacing: 0.05em;
  color: var(--color-text);
  text-decoration: none;
  position: relative;
  white-space: nowrap;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 14px;
  right: 14px;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: center;
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
}

.site-nav__link:hover {
  opacity: 1;
  color: var(--color-heading);
}

.site-nav__uyu {
  margin-left: 8px;
  padding: 8px 18px;
  font-size: 12.5px;
  font-family: var(--font-sans);
  letter-spacing: 0.06em;
  color: var(--color-text);
  border: 1px solid var(--color-gold);
  border-radius: 2px;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.site-nav__uyu:hover {
  background: var(--color-gold);
  color: var(--color-white);
  opacity: 1;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.nav-toggle__line {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-toggle.is-open .nav-toggle__line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle__line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-h));
  background: rgba(250, 248, 245, 0.98);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.nav-overlay.is-open {
  display: flex;
}

.nav-overlay__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: 100%;
}

.nav-overlay__link {
  display: block;
  padding: 18px 40px;
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--color-heading);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  width: 100%;
  text-align: center;
}

.nav-overlay__uyu {
  margin-top: 32px;
  padding: 14px 40px;
  font-size: 14px;
  border: 1px solid var(--color-gold);
  border-radius: 2px;
  color: var(--color-text);
}

/* Main content offset */
.page-main {
  padding-top: var(--header-h);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-heading);
  color: rgba(255,255,255,0.65);
  padding: 64px 0 32px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 32px;
}

.site-footer__logo .site-logo__en {
  color: rgba(255,255,255,0.9);
  font-size: 20px;
}

.site-footer__logo .site-logo__ja {
  color: rgba(255,255,255,0.6);
}

.site-footer__info {
  font-size: 13px;
  line-height: 1.9;
  margin-top: 16px;
  color: rgba(255,255,255,0.6);
}

.site-footer__info a {
  color: rgba(255,255,255,0.6);
}

.site-footer__nav-title {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.site-footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__nav-link {
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color var(--transition);
}

.site-footer__nav-link:hover {
  color: rgba(255,255,255,0.9);
  opacity: 1;
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer__copy {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

.site-footer__privacy {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

.site-footer__privacy:hover {
  color: rgba(255,255,255,0.7);
  opacity: 1;
}

/* Page hero (inner pages) */
.page-hero {
  padding: 80px 0 64px;
  background: var(--grad-section);
  text-align: center;
}

.page-hero__en {
  font-family: var(--font-display);
  font-size: 56px;
  color: var(--color-pink);
  line-height: 1;
  margin-bottom: 12px;
  opacity: 0.7;
}

.page-hero__ja {
  font-family: var(--font-serif);
  font-size: 26px;
  color: var(--color-heading);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.page-hero__lead {
  margin-top: 20px;
  font-size: 14px;
  color: var(--color-text);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.9;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 16px;
  justify-content: center;
}

.breadcrumb__sep { opacity: 0.4; }
.breadcrumb a { color: rgba(255,255,255,0.5); }