.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 32px 0;
  transition: var(--transition-slow);
}

.site-header.scrolled {
  position: fixed;
  background: rgba(14, 34, 54, 0.96);
  backdrop-filter: blur(12px);
  padding: 18px 0;
  box-shadow: 0 1px 0 rgba(255,255,255,0.04);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo-img { height: 40px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-family: var(--font-display);
  color: rgba(255,255,255,0.7);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.8px;
  transition: var(--transition-default);
  position: relative;
}

/* Animated underline for nav links (except CTA and lang buttons) */
.nav-links a:not(.btn):not(.nav-lang)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: rgba(255,255,255,0.5);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:not(.btn):not(.nav-lang):hover::after {
  width: 100%;
}

.nav-links a:hover {
  color: #fff;
}

.nav-lang {
  text-transform: uppercase;
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 1.5px;
  opacity: 0.5;
}

.nav-lang:hover { opacity: 1; }

.site-header .nav-cta.btn {
  padding: 10px 28px;
  font-size: 11px;
  letter-spacing: 2px;
  min-height: 44px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: #fff;
  transition: var(--transition-default);
}

/* Hamburger to X animation */
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 767px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-hero-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 32px 32px;
    gap: 24px;
    transition: var(--transition-slow);
  }

  .nav-links.open { right: 0; }

  .nav-links a { font-size: 15px; color: rgba(255,255,255,0.8); }
}