/* ============================================================
   nav.css — Fixed navigation bar
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  transition: background 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(9,9,11,0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--color-border);
}

/* Logo + wordmark */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-brand img {
  width: 22px;
  height: 22px;
  filter: invert(1);
}
.nav-wordmark {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

/* Right side links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--color-text);
}

/* Download CTA in nav */
.nav-cta {
  font-size: var(--text-sm) !important;
  font-weight: 600 !important;
  color: var(--color-text) !important;
  padding: 8px 20px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease !important;
}
.nav-cta:hover {
  background: rgba(255,255,255,0.08) !important;
  border-color: rgba(255,255,255,0.3) !important;
}

/* Hamburger (mobile) */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: calc(var(--z-nav) + 2);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.3s ease;
  border-radius: 1px;
}
.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 menu overlay */
.nav-mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) + 1);
  background: rgba(9,9,11,0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
}
.nav-mobile-menu.open {
  display: flex;
}
.nav-mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.2s ease;
}
.nav-mobile-menu a:hover {
  color: var(--color-accent-text);
}