.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(5, 9, 20, 0.95), rgba(5, 9, 20, 0.88));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

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

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

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top, rgba(255, 51, 102, 0.6), rgba(5, 9, 20, 0.9));
  box-shadow: var(--shadow-sm);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: var(--text-sm);
}

.site-header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__logo-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.site-header__logo-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.site-header__nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: none;
}

.site-header__nav-link:hover,
.site-header__nav-link[aria-current="page"] {
  color: var(--gray-50);
}

.site-header__cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-4);
}

.site-header__cta-primary {
  white-space: nowrap;
}

.site-header__cta-secondary {
  white-space: nowrap;
}

/* Mobile toggle */
.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.25);
  color: inherit;
}

.site-header__toggle-bar {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background: var(--gray-100);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

/*******************
 * Responsive
 *******************/
@media (max-width: 960px) {
  .site-header__inner {
    padding-block: var(--space-3);
  }

  .site-header__toggle {
    display: inline-flex;
    order: 2;
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 3.5rem;
    background: radial-gradient(circle at top, rgba(255, 51, 102, 0.18), transparent 55%), #050914;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform-origin: top;
    transform: scaleY(0.9);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .site-header__nav-link {
    font-size: var(--text-base);
  }

  .site-header__nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }

  .site-header__cta {
    display: none;
  }
}

@media (max-width: 600px) {
  .site-header__logo-subtitle {
    display: none;
  }
}

/* Helper class when mobile menu is open to prevent body scroll */
.u-lock-scroll {
  overflow: hidden;
}