.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(230, 224, 216, 0.9);
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.04);
}

.site-header__inner {
  width: var(--container-wide);
  margin: 0 auto;
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 88px;
  padding: 14px 0;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo__text {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 2.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1;
}

.site-logo__text span {
  margin-left: 2px;
  font-size: 1rem;
  color: var(--color-gold-dark);
}

.custom-logo-link img {
  max-height: 56px;
  width: auto;
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__contact {
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(181, 138, 58, 0.22);
  font-size: 0.95rem;
  font-weight: 700;
}

.site-header__contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.site-header__contact-icon svg {
  width: 16px;
  height: 16px;
}

.site-header__contact-text {
  line-height: 1;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  position: relative;
  z-index: 56;
  width: 50px;
  height: 50px;
  padding: 0;
  border: 1px solid rgba(230, 224, 216, 0.92);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 28px rgba(17, 17, 17, 0.06);
  color: var(--color-text);
  flex-shrink: 0;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(181, 138, 58, 0.4);
  box-shadow: 0 16px 32px rgba(17, 17, 17, 0.08);
}

.menu-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle__line:nth-child(2) {
  width: 16px;
}

.mobile-nav__toggle:checked ~ .site-header .menu-toggle {
  opacity: 0;
  pointer-events: none;
}

.mobile-nav__toggle:checked ~ .site-header .button--contact {
  opacity: 0;
  pointer-events: none;
}

.mobile-nav__logo {
  display: inline-flex;
  align-items: center;
  margin-right: auto;
}

@media (max-width: 768px) {
  .site-header__bar {
    min-height: 76px;
    padding: 12px 0;
  }

  .site-logo__text {
    font-size: clamp(1.8rem, 8vw, 2.1rem);
  }

  .site-logo__text span {
    font-size: 0.88rem;
  }

  .site-header__contact {
    display: none;
  }

  .menu-toggle {
    width: 46px;
    height: 46px;
    border-radius: 14px;
  }
}

.site-nav--desktop {
  display: none;
}

.mobile-nav__toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.site-nav__menu,
.mobile-nav__menu,
.site-footer__menu {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__menu {
  gap: clamp(18px, 2vw, 34px);
}

.site-nav__link,
.mobile-nav__link {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
}

.site-nav__en,
.mobile-nav__en {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.site-nav__ja,
.mobile-nav__ja {
  font-size: 0.68rem;
  color: var(--color-muted);
}

.site-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-shrink: 0;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  position: relative;
  z-index: 56;
  width: 58px;
  height: 58px;
  padding: 0;
  border: 1px solid rgba(230, 224, 216, 0.92);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 36px rgba(17, 17, 17, 0.08);
  color: var(--color-text);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(181, 138, 58, 0.4);
  box-shadow: 0 22px 40px rgba(17, 17, 17, 0.1);
}

.menu-toggle__line {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle__line:nth-child(2) {
  width: 18px;
}

.menu-toggle[aria-expanded="true"] {
  border-color: rgba(181, 138, 58, 0.46);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 20px 38px rgba(17, 17, 17, 0.1);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(2) {
  width: 24px;
}

.mobile-nav__toggle:checked ~ .site-header .menu-toggle {
  opacity: 0;
  pointer-events: none;
}

.mobile-nav__toggle:checked ~ .site-header .button--contact {
  opacity: 0;
  pointer-events: none;
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 68;
  background: rgba(17, 17, 17, 0.64);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.mobile-nav__toggle:checked ~ .mobile-nav__overlay {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 70;
  pointer-events: none;
}

.mobile-nav__panel {
  position: relative;
  width: min(92vw, 440px);
  min-height: 100vh;
  height: 100vh;
  margin-left: auto;
  overflow-y: auto;
  padding: 28px 28px 36px;
  background: linear-gradient(180deg, #fffdf9, #f7f2ea);
  box-shadow: -18px 0 44px rgba(17, 17, 17, 0.12);
  transform: translateX(100%);
  transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.mobile-nav__toggle:checked ~ .mobile-nav {
  pointer-events: auto;
}

.mobile-nav__toggle:checked ~ .mobile-nav .mobile-nav__panel {
  transform: translateX(0);
}

.mobile-nav__head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin: 0 -28px 18px;
  padding: 8px 28px 12px;
  background: linear-gradient(180deg, rgba(255, 253, 249, 0.98), rgba(255, 253, 249, 0.9));
  backdrop-filter: blur(8px);
}

.mobile-nav__close {
  display: inline-block;
  position: relative;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 1px solid rgba(230, 224, 216, 0.96);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 28px rgba(17, 17, 17, 0.08);
  flex-shrink: 0;
}

.mobile-nav__close span {
  position: absolute;
  top: 24px;
  left: 14px;
  width: 24px;
  height: 2px;
  background: currentColor;
}

.mobile-nav__close span:first-child {
  transform: rotate(45deg);
}

.mobile-nav__close span:last-child {
  transform: rotate(-45deg);
}

.mobile-nav__heading {
  margin: 0;
  margin-bottom: 18px;
  font-family: var(--font-en);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold-dark);
}

.mobile-nav__menu {
  display: block;
  margin: 0;
  padding: 0;
}

.mobile-nav__item {
  display: block;
  width: 100%;
  margin-bottom: 12px;
}

.mobile-nav__item,
.mobile-nav__works,
.mobile-nav__contact {
  opacity: 0;
  transform: translate3d(22px, 0, 0);
  transition:
    opacity 0.42s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.mobile-nav__item:nth-child(1) {
  transition-delay: 0.06s;
}

.mobile-nav__item:nth-child(2) {
  transition-delay: 0.1s;
}

.mobile-nav__item:nth-child(3) {
  transition-delay: 0.14s;
}

.mobile-nav__item:nth-child(4) {
  transition-delay: 0.18s;
}

.mobile-nav__item:nth-child(5) {
  transition-delay: 0.22s;
}

.mobile-nav__item:nth-child(6) {
  transition-delay: 0.26s;
}

.mobile-nav__works {
  transition-delay: 0.3s;
}

.mobile-nav__contact {
  transition-delay: 0.34s;
}

.mobile-nav__toggle:checked ~ .mobile-nav .mobile-nav__item,
.mobile-nav__toggle:checked ~ .mobile-nav .mobile-nav__works,
.mobile-nav__toggle:checked ~ .mobile-nav .mobile-nav__contact {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .mobile-nav__overlay,
  .mobile-nav__panel,
  .mobile-nav__item,
  .mobile-nav__works,
  .mobile-nav__contact {
    transition: none;
  }

  .mobile-nav__item,
  .mobile-nav__works,
  .mobile-nav__contact {
    opacity: 1;
    transform: none;
  }
}

.mobile-nav__works {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid rgba(181, 138, 58, 0.18);
}

.mobile-nav__works-title {
  margin: 0 0 12px;
  font-family: var(--font-en);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-gold-dark);
}

.mobile-nav__works-caption {
  margin: -4px 0 12px;
  color: var(--color-muted);
  font-size: 0.78rem;
  line-height: 1.6;
}

.mobile-nav__works-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.mobile-nav__works-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 56px;
  padding: 12px 14px;
  border: 1px solid rgba(230, 224, 216, 0.96);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
  text-align: center;
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.mobile-nav__works-link:hover,
.mobile-nav__works-link:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(181, 138, 58, 0.38);
  box-shadow: 0 10px 22px rgba(17, 17, 17, 0.06);
}

.mobile-nav__works-link.is-active {
  background: var(--gradient-gold);
  border-color: transparent;
  color: var(--color-white);
}

.mobile-nav__link {
  display: block;
  position: relative;
  width: 100%;
  min-height: 0;
  padding: 18px 46px 18px 18px;
  border: 1px solid rgba(230, 224, 216, 0.96);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--color-text);
  box-shadow: 0 10px 24px rgba(17, 17, 17, 0.05);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, color 0.22s ease;
}

.mobile-nav__link > span {
  display: block;
}

.mobile-nav__link:hover,
.mobile-nav__link:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(181, 138, 58, 0.42);
  box-shadow: 0 14px 28px rgba(17, 17, 17, 0.08);
  color: var(--color-gold-dark);
}

.mobile-nav__link::after {
  content: "↗";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  font-size: 0.92rem;
  color: rgba(181, 138, 58, 0.78);
}

.mobile-nav__en,
.mobile-nav__ja {
  display: block;
}

.mobile-nav__en {
  color: var(--color-text);
  font-size: 1.05rem;
  line-height: 1.15;
  margin-bottom: 4px;
}

.mobile-nav__ja {
  font-size: 0.9rem;
  line-height: 1.5;
}

.mobile-nav__contact {
  width: 100%;
  margin-top: 28px;
}