/* ============ SHARED STYLES ============ */
:root {
  --black: #0a0a08;
  --off-black: #111110;
  --stone: #2a2a27;
  --gold: #b8955a;
  --gold-light: #d4aa6e;
  --cream: #e8e0d0;
  --mist: #a89e8e;
  --white: #f5f0e8;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--black);
  color: var(--cream);
  font-family: 'Noto Serif JP', serif;
  font-weight: 300;
  overflow-x: hidden;
}
.lang-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 2.5rem; height: 52px;
  background: rgba(10,10,8,0.9); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(184,149,90,0.15);
}
.lang-bar .site-tagline {
  font-size: 0.7rem; letter-spacing: 0.2em; color: var(--mist);
  font-family: 'Cormorant Garamond', serif; font-style: italic;
}
.lang-switcher { display: flex; gap: 1.2rem; }
.lang-switcher button {
  background: none; border: none; color: var(--mist);
  font-size: 0.7rem; letter-spacing: 0.15em; cursor: pointer;
  padding: 0.2rem 0; border-bottom: 1px solid transparent;
  transition: color 0.3s, border-color 0.3s;
  font-family: 'Cormorant Garamond', serif;
}
.lang-switcher button.active, .lang-switcher button:hover {
  color: var(--gold); border-color: var(--gold);
}
nav {
  position: fixed; top: 52px; left: 0; right: 0; z-index: 99;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 2.5rem; height: 64px;
  background: rgba(10,10,8,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(184,149,90,0.1);
}
.nav-logo {
  font-size: 1.4rem; letter-spacing: 0.25em; color: var(--white);
  font-family: 'Noto Serif JP', serif; font-weight: 400; text-decoration: none;
}
.nav-links { display: flex; gap: 0; list-style: none; }
.nav-links a {
  display: block; padding: 0 1.1rem;
  font-size: 0.68rem; letter-spacing: 0.1em; color: var(--mist);
  text-decoration: none; transition: color 0.3s;
  border-right: 1px solid rgba(184,149,90,0.15); line-height: 64px;
}
.nav-links li:first-child a { border-left: 1px solid rgba(184,149,90,0.15); }
.nav-links a:hover, .nav-links a.current { color: var(--gold-light); }
.page-top { margin-top: 116px; }
.section-label {
  font-family: 'Cormorant Garamond', serif; font-style: italic;
  font-size: 0.75rem; letter-spacing: 0.3em; color: var(--gold); margin-bottom: 0.6rem;
}
.section-title {
  font-size: 1.8rem; font-weight: 300; letter-spacing: 0.2em;
  color: var(--white); margin-bottom: 3rem;
}
footer {
  background: var(--off-black); border-top: 1px solid rgba(184,149,90,0.15);
  padding: 4rem 2.5rem;
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: auto 1fr auto;
  gap: 4rem; align-items: start;
}
.footer-logo {
  font-size: 1.8rem; letter-spacing: 0.3em; color: var(--white);
  writing-mode: vertical-rl; font-weight: 400;
}
.footer-info { display: flex; flex-direction: column; gap: 0.8rem; }
.footer-info p { font-size: 0.75rem; letter-spacing: 0.1em; color: var(--mist); line-height: 1.8; }
.footer-info .label { color: var(--gold); font-size: 0.65rem; letter-spacing: 0.2em; margin-right: 0.8rem; }
.footer-copy {
  font-family: 'Cormorant Garamond', serif; font-size: 0.7rem;
  letter-spacing: 0.1em; color: var(--mist); align-self: flex-end;
}
[data-lang] { display: none; }
[data-lang].active { display: block; }
span[data-lang] { display: none; }
span[data-lang].active { display: inline; }

/* ============ MOBILE NAV ============ */
.nav-toggle {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 36px; height: 36px; cursor: pointer;
  background: none; border: none; padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 1px;
  background: var(--mist); transition: all 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 768px) {
  .lang-bar { padding: 0 1.2rem; }
  .lang-bar .site-tagline { display: none; }

  nav { padding: 0 1.2rem; }
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed; top: 116px; left: 0; right: 0;
    background: rgba(10,10,8,0.97); backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(184,149,90,0.15);
    z-index: 98;
  }
  .nav-links.open { display: flex; }
  .nav-links li { border-top: 1px solid rgba(184,149,90,0.08); }
  .nav-links a {
    line-height: 1; padding: 1.1rem 1.5rem;
    font-size: 0.8rem; letter-spacing: 0.12em;
    border: none;
  }
  .nav-links li:first-child a { border: none; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-logo { writing-mode: horizontal-tb; font-size: 1.4rem; }
  .footer-copy { align-self: auto; }
}