/* ── NAV ───────────────────────────────── */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 2.5rem;
  background: linear-gradient(to bottom, rgba(9, 16, 31, 0.75) 0%, transparent 100%);
  transition: background 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
}

#nav.scrolled {
  background: rgba(10, 18, 36, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
}

.nav-brand {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}

.nav-brand-top {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--white);
  line-height: 1;
}

.nav-brand-sub {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.48rem;
  letter-spacing: 0.5em;
  color: var(--amber);
  line-height: 1;
}

.nav-links {
  flex: 1;
  display: flex;
  list-style: none;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--white);
  border-bottom-color: var(--amber);
}

.nav-right {
  flex: 0 0 auto;
}

.nav-btn {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy-deep);
  background: var(--amber);
  padding: 0.65rem 1.4rem;
  display: inline-block;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s;
}

.nav-btn:hover {
  background: var(--amber-light);
}

/* hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  flex-shrink: 0;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.25s, opacity 0.25s;
}

.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-mobile {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: rgba(10, 18, 36, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1.5rem 2.5rem 2rem;
  flex-direction: column;
  gap: 0;
  z-index: 199;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  transform: translateY(-8px);
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
}

.nav-mobile.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.nav-mobile a {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: color 0.2s;
}

.nav-mobile a:last-child { border-bottom: none; }

.nav-mobile a:hover { color: var(--amber-light); }

.nav-mobile .nav-mobile-cta {
  margin-top: 1.2rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--navy-deep);
  background: var(--amber);
  padding: 0.9rem 1.5rem;
  text-align: center;
  border-bottom: none;
}

.nav-mobile .nav-mobile-cta:hover {
  background: var(--amber-light);
  color: var(--navy-deep);
}