/* ─── Navigation ─── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition:
    background 0.5s cubic-bezier(0.22, 1, 0.36, 1),
    backdrop-filter 0.5s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.5s cubic-bezier(0.22, 1, 0.36, 1),
    padding 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

nav.scrolled {
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 3rem;
  box-shadow: 0 1px 0 rgba(26, 26, 26, 0.06);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--charcoal);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links a:hover {
  color: var(--charcoal);
}

.nav-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
  z-index: var(--z-hamburger);
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--charcoal);
  transition: all 0.3s ease;
}

/* ─── Mobile Menu ─── */

.mobile-menu {
  display: flex;
  visibility: hidden;
  position: fixed;
  inset: 0;
  background: var(--ivory);
  z-index: var(--z-mobile-menu);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.4s ease,
    visibility 0.4s ease;
}

.mobile-menu.active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--charcoal);
  text-decoration: none;
  letter-spacing: 0.1em;
}