/* Shared navbar styles. Variables (--gold, --gold-light, --muted, --border, --sans, --jp)
   are defined per-page in :root. */

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  padding: 16px 36px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10,9,8,0.6); backdrop-filter: blur(24px) saturate(1.3);
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s ease, background 0.3s ease;
}
nav.scrolled { padding: 10px 36px; background: rgba(10,9,8,0.94); }

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--sans);
  font-size: 0.88rem; font-weight: 500; letter-spacing: 0.18em;
  color: var(--gold); text-transform: uppercase;
  text-decoration: none;
}
.logo-kanji {
  font-family: var(--jp);
  font-size: 1.5rem; font-weight: 400; text-transform: none;
  color: var(--gold); line-height: 1;
}

.nav-right { display: flex; align-items: center; gap: 36px; }

.nav-link {
  font-size: 0.72rem; font-weight: 500; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); text-decoration: none;
  transition: color 0.25s ease;
  position: relative;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -6px; left: 50%; right: 50%;
  height: 1px; background: var(--gold); opacity: 0.5;
  transition: left 0.25s ease, right 0.25s ease;
}
.nav-link:hover::after, .nav-link.active::after { left: 0; right: 0; }
.nav-link:hover, .nav-link.active { color: var(--gold); }

.nav-cta {
  background: var(--gold); color: #0a0908; font-weight: 500;
  padding: 8px 24px; font-size: 0.72rem; letter-spacing: 0.1em;
  text-transform: uppercase; border: 1px solid var(--gold);
  cursor: pointer; text-decoration: none; font-family: var(--sans);
  transition: all 0.25s ease;
}
.nav-cta:hover {
  background: var(--gold-light); color: #0a0908;
  border-color: var(--gold-light);
  box-shadow: 0 6px 20px rgba(201,169,110,0.3);
}

/* Hamburger toggle, hidden on desktop */
.nav-toggle {
  display: none;
  background: transparent; border: none;
  width: 36px; height: 36px; padding: 0;
  cursor: pointer; position: relative; z-index: 901;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle span {
  position: absolute; left: 8px; right: 8px;
  height: 1.5px; background: var(--gold);
  transition: top 0.25s ease, transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle span:nth-child(1) { top: 12px; }
.nav-toggle span:nth-child(2) { top: 17.5px; }
.nav-toggle span:nth-child(3) { top: 23px; }
.nav-toggle.open span:nth-child(1) { top: 17.5px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 17.5px; transform: rotate(-45deg); }

.nav-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 899;
}
.nav-backdrop.open { opacity: 1; pointer-events: auto; }

@media (max-width: 768px) {
  nav { padding: 12px 18px; }
  nav.scrolled { padding: 10px 18px; }

  .nav-toggle { display: block; }

  .nav-right {
    position: fixed;
    top: 0; right: 0;
    width: min(78vw, 320px);
    height: 100vh;
    padding: 80px 28px 32px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10,9,8,0.98);
    backdrop-filter: blur(24px) saturate(1.3);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(.4,0,.2,1);
    overflow-y: auto;
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
  }
  .nav-right.open { transform: translateX(0); }

  .nav-link {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-link::after { display: none; }

  .nav-cta {
    margin-top: 24px;
    padding: 14px 24px;
    font-size: 0.72rem;
    text-align: center;
  }
}

body.nav-open { overflow: hidden; }