/* Navigation & Hamburger & Mobile Menu */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 500;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 4rem;
  background: rgba(9,9,10,0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(200,169,110,0.08);
  transition: padding var(--ease);
}
.nav-logo {
  display: flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0;
}
.logo-mark {
  width: 40px; height: 40px;
  border: 1px solid rgba(200,169,110,0.5);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-size: 1.05rem; color: var(--gold);
  transition: border-color var(--ease);
}
.nav-logo:hover .logo-mark { border-color: var(--gold); }
.nav-brand {
  font-family: var(--font-serif); font-size: 1.05rem;
  letter-spacing: 0.18em; color: #fff;
}
.nav-links {
  display: flex; align-items: center; gap: 2.5rem;
}
.nav-links a {
  font-size: 0.72rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--muted); text-decoration: none;
  transition: color var(--ease); position: relative; padding-bottom: 2px;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 1px; background: var(--gold);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--ease);
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; background: none; border: none; cursor: pointer;
  padding: 6px; z-index: 600; flex-shrink: 0;
}
.hamburger span {
  display: block; width: 24px; height: 1.5px; background: var(--gold);
  transition: transform 0.35s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Overlay Menu */
.mobile-menu {
  position: fixed; inset: 0; z-index: 400;
  background: rgba(9,9,10,0.97); backdrop-filter: blur(20px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 1.8rem;
  opacity: 0; visibility: hidden;
  transition: opacity 0.4s, visibility 0.4s;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a {
  font-family: var(--font-serif); font-size: 2.2rem; font-weight: 300;
  color: rgba(255,255,255,0.55); text-decoration: none;
  letter-spacing: 0.05em; text-align: center;
  transition: color var(--ease);
}
.mobile-menu a:hover,
.mobile-menu a.active { color: var(--gold); }
.mobile-divider { width: 40px; height: 1px; background: rgba(200,169,110,0.25); }

@media (max-width: 900px) {
  .site-nav {
    padding: 1rem 1.5rem;
    width: 100%;
    max-width: 100vw;
    overflow: hidden;
  }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-brand { font-size: 0.95rem; letter-spacing: 0.12em; }
}