nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem var(--pad-x);
  z-index: 100;
  transition: background 0.4s, backdrop-filter 0.4s;
}

nav.scrolled {
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo img { height: 30px; width: auto; }

.nav-r {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-r a {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.3s;
}
.nav-r a:hover { color: #fff; }

.nav-btn {
  font-size: 0.72rem;
  color: #000;
  background: #fff;
  border: none;
  padding: 0.55rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: opacity 0.3s;
}
.nav-btn:hover { opacity: 0.82; }

/* Mobile */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 1px;
  background: #fff;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.97);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  opacity: 0;
  transition: opacity 0.35s;
}
.nav-mobile-menu.open { display: flex; opacity: 1; }
.nav-mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  color: #fff;
  letter-spacing: -0.03em;
  opacity: 0.7;
  transition: opacity 0.3s;
}
.nav-mobile-menu a:hover { opacity: 1; }

@media (max-width: 768px) {
  .nav-r { display: none; }
  .nav-hamburger { display: flex; }
  nav { padding: 1.5rem var(--pad-x-sm); }
}