.ns-header {
  position: sticky;
  top: 0;
  z-index: 40;
}

.ns-header__inner {
  gap: var(--space-16);
}

.ns-header__brand {
  display: flex;
  align-items: center;
}

.ns-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
}

.ns-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 0, #2bb673 0, #0f1628 40%, #060b1a 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ns-header__logo-text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.ns-header__nav {
  margin-left: auto;
}

.ns-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.ns-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding-block: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.ns-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  transform: scaleX(0);
  transform-origin: left;
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.ns-header__nav-link:hover,
.ns-header__nav-link:focus-visible {
  color: var(--color-text);
}

.ns-header__nav-link:hover::after,
.ns-header__nav-link:focus-visible::after {
  transform: scaleX(1);
  opacity: 1;
}

.ns-header__menu-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(6, 11, 26, 0.8);
  align-items: center;
  justify-content: center;
  padding: 0;
}

.ns-header__menu-toggle-bar {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-fast), top var(--transition-normal), bottom var(--transition-normal);
}

.ns-header__menu-toggle-bar:nth-child(1) {
  top: 13px;
}

.ns-header__menu-toggle-bar:nth-child(2) {
  top: 19px;
}

.ns-header__menu-toggle-bar:nth-child(3) {
  bottom: 13px;
}

.ns-header__menu-toggle[aria-expanded="true"] .ns-header__menu-toggle-bar:nth-child(1) {
  top: 19px;
  transform: rotate(45deg);
}

.ns-header__menu-toggle[aria-expanded="true"] .ns-header__menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.ns-header__menu-toggle[aria-expanded="true"] .ns-header__menu-toggle-bar:nth-child(3) {
  bottom: auto;
  top: 19px;
  transform: rotate(-45deg);
}

.ns-header__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  z-index: 35;
}

.ns-header__overlay[hidden] {
  display: none;
}

@media (max-width: 768px) {
  .ns-header__menu-toggle {
    display: inline-flex;
  }

  .ns-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: radial-gradient(circle at top, #12192d 0, #060b1a 55%);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    z-index: 40;
  }

  .ns-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-12) var(--space-16) var(--space-16);
  }

  .ns-header__nav-link {
    width: 100%;
    padding-block: var(--space-6);
  }

  .ns-header__nav-link::after {
    display: none;
  }

  .ns-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ns-header__nav,
  .ns-header__menu-toggle-bar {
    transition: none;
  }
}