.nv-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: radial-gradient(circle at top left, rgba(230, 57, 113, 0.08), transparent 55%),
              rgba(5, 6, 8, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

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

.nv-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nv-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.nv-header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: conic-gradient(from 210deg, #e63971, #f97316, #4f46e5, #e63971);
  box-shadow: var(--shadow-glow-primary);
  position: relative;
}

.nv-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: inherit;
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.45), transparent 55%),
              radial-gradient(circle at 70% 80%, rgba(15, 23, 42, 0.9), #020617);
}

.nv-header__title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text);
  white-space: nowrap;
}

.nv-header__nav {
  display: flex;
}

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

.nv-header__nav-item--highlight .nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(230, 57, 113, 0.85);
  background: linear-gradient(135deg, rgba(230, 57, 113, 0.16), rgba(15, 23, 42, 0.9));
  color: var(--color-text);
}

.nv-header__nav-item--highlight .nav-link::after {
  display: none;
}

.nv-header__nav-item--highlight .nav-link:hover {
  background: linear-gradient(135deg, #e63971, #f97316);
  color: #ffffff;
  box-shadow: var(--shadow-glow-primary);
}

/* Mobile toggle */

.nv-header__toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.3rem;
  cursor: pointer;
  transition: border-color var(--transition-normal),
              box-shadow var(--transition-normal),
              background-color var(--transition-normal),
              transform var(--transition-fast);
}

.nv-header__toggle:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-soft);
}

.nv-header__toggle-bar {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-normal),
              opacity var(--transition-normal),
              width var(--transition-normal);
}

.nv-header__toggle[aria-expanded="true"] .nv-header__toggle-bar:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nv-header__toggle[aria-expanded="true"] .nv-header__toggle-bar:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* Responsive */

@media (max-width: 960px) {
  .nv-header__title {
    font-size: var(--font-size-base);
    letter-spacing: 0.16em;
  }
}

@media (max-width: 768px) {
  .nv-header__inner {
    justify-content: space-between;
  }

  .nv-header__brand {
    flex: 1;
  }

  .nv-header__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nv-header__nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 1px);
    min-height: calc(100dvh - 4.25rem);
    background: #000000;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    overflow-y: auto;
    transition: opacity var(--transition-normal),
                transform var(--transition-normal),
                visibility var(--transition-normal);
  }

  .nv-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    min-height: 100%;
    background-color: #000000;
    padding: var(--space-8) var(--space-4) var(--space-12);
    gap: var(--space-4);
  }

  .nv-header__nav-item .nav-link {
    font-size: var(--font-size-base);
  }

  .nv-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nv-header,
  .nv-header__nav {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}