/* ── Nav wrapper ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), backdrop-filter var(--transition-base),
              border-color var(--transition-base), box-shadow var(--transition-base);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: var(--color-nav-glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-color: var(--color-border-subtle);
  box-shadow: 0 2px 24px rgba(0,0,0,0.4);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ────────────────────────────────────────────────── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo img,
.nav__logo svg {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  line-height: 1;
}

.nav__logo-text span {
  color: var(--color-accent);
}

/* ── Desktop links ───────────────────────────────────────── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background var(--transition-fast);
  letter-spacing: 0.01em;
}

.nav__link:hover {
  color: var(--color-text);
  background: rgba(0,0,0,0.05);
}

.nav__link.is-active {
  color: var(--color-accent);
}

/* CTA button in nav */
.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: opacity var(--transition-fast), box-shadow var(--transition-fast);
}

.nav__cta:hover {
  opacity: 0.9;
  box-shadow: 0 0 16px var(--color-accent-glow);
}

/* ── Hamburger ───────────────────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
}

.nav__hamburger:hover {
  background: rgba(0,0,0,0.05);
}

.nav__hamburger-line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__hamburger.is-open .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger.is-open .nav__hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__hamburger.is-open .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile overlay ──────────────────────────────────────── */
.nav__mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nav__mobile-overlay.is-open {
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-link {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  padding: var(--space-3) var(--space-6);
  transition: color var(--transition-fast);
}

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

.nav__mobile-cta {
  margin-top: var(--space-4);
  display: inline-flex;
  align-items: center;
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-bg);
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .nav__mobile-overlay { display: flex; }
}