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

.gnp-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

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

.gnp-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
}

.gnp-header__logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 30% 70% 65% 35%;
  background:
    radial-gradient(circle at 20% 20%, rgba(58, 224, 255, 0.9) 0, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(155, 92, 255, 0.9) 0, transparent 42%),
    linear-gradient(135deg, #050814 0, #11152b 45%, #050814 100%);
  box-shadow: 0 0 16px rgba(58, 224, 255, 0.6), 0 0 24px rgba(155, 92, 255, 0.5);
  position: relative;
  overflow: hidden;
}

.gnp-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 16%;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: inset 0 0 12px rgba(0, 0, 0, 0.8);
}

.gnp-header__logo-text {
  display: flex;
  flex-direction: column;
}

.gnp-header__logo-title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.gnp-header__logo-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* Navigation */
.gnp-header__nav {
  display: flex;
  align-items: center;
}

.gnp-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.gnp-header__nav-item--accent {
  margin-left: var(--space-2);
}

.gnp-header__cta {
  font-size: var(--font-size-xs);
  padding-inline: 1.3rem;
}

/* Mobile toggle */
.gnp-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-strong);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  background: rgba(5, 8, 20, 0.9);
  color: var(--color-text);
  cursor: pointer;
}

.gnp-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: transform var(--transition-fast), opacity var(--transition-fast), width var(--transition-fast);
}

.gnp-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Toggle active state (controlled via JS) */
.gnp-header__toggle--open .gnp-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.gnp-header__toggle--open .gnp-header__toggle-bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.gnp-header__toggle--open .gnp-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Responsive behavior */
@media (max-width: 864px) {
  .gnp-header__toggle {
    display: inline-flex;
  }

  .gnp-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 64px;
    background: rgba(5, 8, 20, 0.98);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding-block: var(--space-3);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .gnp-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .gnp-header__nav-item--accent {
    margin-left: 0;
    width: 100%;
  }

  .gnp-header__nav-item--accent .gnp-header__cta {
    width: 100%;
    justify-content: center;
  }

  .gnp-header__nav--open {
    max-height: 480px;
    opacity: 1;
    visibility: visible;
    padding: 20px;
  }
}

@media (max-width: 640px) {
  .gnp-header__logo-title {
    font-size: var(--font-size-md);
  }

  .gnp-header__logo-tagline {
    display: none;
  }
}

/* Active link helper class to be toggled server-side or via JS */
.nav-link.nav-link--active {
  color: #ffffff;
}

.nav-link.nav-link--active::after {
  width: 100%;
}