.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(to bottom, rgba(5, 5, 9, 0.98), rgba(5, 5, 9, 0.92), rgba(5, 5, 9, 0.75), transparent 100%);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.32);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background:
    radial-gradient(circle at top left, rgba(62, 123, 255, 0.4), transparent 60%),
    radial-gradient(circle at bottom right, rgba(255, 39, 87, 0.45), transparent 55%),
    rgba(15, 23, 42, 0.96);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
}

.site-logo span {
  color: var(--color-text);
}

.nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-2) 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background-image: var(--gradient-blue-red);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  width: 100%;
}

.nav-link[aria-current="page"] {
  color: var(--color-text);
}

.nav-link--cta {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: radial-gradient(circle at top left, rgba(62, 123, 255, 0.25), transparent 55%), rgba(15, 23, 42, 0.9);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.85);
}

.nav-link--cta::after {
  display: none;
}

.nav-link--cta:hover {
  background-image: var(--gradient-blue-red);
  color: #ffffff;
  border-color: transparent;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 32px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background: #e5e7eb;
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.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);
}

.nav-mobile {
  display: none;
  background: rgba(5, 5, 9, 0.98);
  border-bottom: 1px solid rgba(148, 163, 184, 0.32);
}

.nav-mobile .nav-list {
  flex-direction: column;
  align-items: flex-start;
  padding-top: var(--space-2);
  padding-bottom: var(--space-4);
}

.nav-mobile.is-open {
  display: block;
}

@media (min-width: 992px) {
  .nav-toggle {
    display: none;
  }
  .nav {
    display: block;
  }
  .nav-mobile {
    display: none !important;
  }
}