/* ─── NAV ─── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  transition: background 0.5s ease, border-color 0.5s ease, height 0.4s ease;
  border-bottom: 1px solid transparent;
}

#nav.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--rule);
  height: calc(var(--nav-h) - 14px);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-mark {
  height: 42px;
  width: auto;
  filter: invert(1);
  opacity: 0.95;
  transition: opacity 0.3s;
}

.nav-logo:hover .nav-logo-mark { opacity: 1; }

.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-logo-top {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ivory-dim);
  line-height: 1;
}

.nav-logo-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ivory);
  line-height: 1;
}

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.8rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mid);
  text-decoration: none;
  position: relative;
  transition: color 0.3s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px; left: 0;
  width: 0; height: 1px;
  background: var(--ivory);
  transition: width 0.35s ease;
}

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

.nav-links a:hover::after { width: 100%; }

/* CTA */
.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--ivory);
  padding: 9px 20px;
  text-decoration: none;
  border: 1px solid var(--ivory);
  transition: background 0.3s, color 0.3s, transform 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: transparent;
  color: var(--ivory);
  transform: translateY(-1px);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--ivory);
  transition: all 0.3s;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--ink);
  z-index: 190;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 0 var(--gutter);
  gap: 2.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.nav-drawer.open {
  opacity: 1;
  pointer-events: all;
}

.nav-drawer a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 300;
  color: var(--ivory);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.3s;
}

.nav-drawer a:hover { color: var(--mid); }

@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}