.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  z-index: var(--nav-z-index);
  display: flex;
  align-items: center;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 0, 20, 0.97), rgba(5, 0, 20, 0.88), transparent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: var(--text-xs);
}

.nav-brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--gradient-action);
  box-shadow: 0 0 18px rgba(255, 0, 122, 0.9);
}

.nav-brand-text {
  white-space: nowrap;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

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

.nav-link {
  position: relative;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-gray-100);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, rgba(255, 0, 122, 0), rgba(255, 0, 122, 1), rgba(255, 0, 122, 0));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.32);
  background: rgba(6, 2, 26, 0.96);
}

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  border-radius: 999px;
  background-color: #ffffff;
}

@media (max-width: 960px) {
  .nav-main {
    position: fixed;
    inset: var(--header-height) var(--space-4) auto var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    background: rgba(5, 0, 20, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-strong);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    max-width: 420px;
    margin-left: auto;
    transform-origin: top right;
    transform: scale(0.97);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
  }

  .nav-main.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scale(1);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 520px) {
  .nav-brand-text {
    max-width: 9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-main {
    transition: none;
  }
}