/* ============================================================
   PRENIUM — Navigation (Liquid Glass)
   Always glass from load — deepens on scroll
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  /* Transparent at top — blends with hero */
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

/* Scrolled: stronger glass */
.nav.nav--scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: rgba(27, 63, 228, 0.15);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04), 0 4px 24px rgba(0,0,0,0.06);
}

/* ── Inner layout ── */
.nav__inner {
  width: 100%;
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.nav__logo-img {
  height: auto;
  width: 120px;
  min-width: 120px;
  display: block;
  transition: opacity var(--transition);
}

.nav__logo-img:hover {
  opacity: 0.75;
}

/* ── Desktop links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.nav__link {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.70rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mid);
  position: relative;
  transition: color var(--transition);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--transition);
}

.nav__link:hover {
  color: var(--text-dark);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* ── CTA — Dark Smoke Glass ── */
.nav__cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(27, 63, 228, 0.20);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.67rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-radius: 100px;
  border: 1px solid rgba(27, 63, 228, 0.35);
  box-shadow:
    inset 0 1.5px 0 rgba(255, 255, 255, 0.20),
    0 8px 24px rgba(27, 63, 228, 0.20);
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  white-space: nowrap;
  flex-shrink: 0;
  overflow: hidden;
}

.nav__cta::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 100px;
  background: linear-gradient(175deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.04) 30%, transparent 55%);
  pointer-events: none;
}

.nav__cta:hover {
  background: rgba(27, 63, 228, 0.35);
  border-color: rgba(27, 63, 228, 0.60);
  transform: translateY(-2px);
  box-shadow:
    inset 0 1.5px 0 rgba(255, 255, 255, 0.25),
    0 12px 40px rgba(27, 63, 228, 0.35);
}

/* ── Hamburger ── */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 26px;
  cursor: pointer;
  padding: 4px 0;
  flex-shrink: 0;
}

.nav__burger span {
  display: block;
  height: 1px;
  background: var(--text-dark);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav__burger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── Mobile menu ── */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(252, 252, 252, 0.97);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-top: 1px solid rgba(0,0,0,0.05);
  padding: 2rem 3rem 3rem;
  flex-direction: column;
  z-index: 999;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.nav__mobile.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.nav__mobile-link {
  font-family: var(--font-title);
  font-weight: 300;
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dark);
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: color var(--transition);
}

.nav__mobile-link:hover {
  color: var(--gold-dark);
}

.nav__mobile-cta {
  margin-top: 2rem;
  align-self: flex-start;
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .nav__links,
  .nav__cta {
    display: none;
  }
  .nav__burger {
    display: flex;
  }
  .nav__mobile {
    display: flex;
  }
  .nav__inner {
    padding: 0 1.5rem;
  }
}