.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  background: linear-gradient(120deg, rgba(5, 7, 17, 0.96), rgba(5, 7, 17, 0.9));
  border-bottom: 1px solid var(--color-border-subtle);
}

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

.site-header-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text);
}

.site-header-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  background-image: var(--gradient-primary);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
}

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

.site-header-logo-title {
  font-size: var(--text-md);
  font-weight: 650;
  letter-spacing: var(--letter-tight);
}

.site-header-logo-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.site-header-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background: rgba(5, 7, 17, 0.9);
  cursor: pointer;
  padding: 0;
  margin-left: auto;
}

.site-header-toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.site-header-toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-base) var(--easing-soft), opacity var(--transition-base) var(--easing-soft), background var(--transition-base) var(--easing-soft);
}

.site-header-toggle-bar + .site-header-toggle-bar {
  margin-top: 3px;
}

.site-header-nav {
  position: absolute;
  inset-inline: 0;
  top: 100%;
  background: radial-gradient(circle at 0 0, rgba(47, 107, 255, 0.22) 0, transparent 55%), radial-gradient(circle at 100% 100%, rgba(255, 51, 102, 0.28) 0, transparent 55%), var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border-subtle);
  transform-origin: top;
  transform: scaleY(0.9);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base) var(--easing-soft), transform var(--transition-base) var(--easing-soft), visibility var(--transition-base) var(--easing-soft);
}

.site-header-nav-inner {
  display: none;
}

.site-header-nav-primary {
  list-style: none;
  margin: 0;
  padding: var(--space-sm) var(--layout-gutter);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-header-nav-item {
  margin: 0;
}

.site-header-nav-link {
  display: block;
  padding-block: 0.6rem;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

.site-header-nav-link:hover {
  color: var(--color-text);
}

.site-header-nav-cta .site-header-nav-link {
  padding-block: 0.4rem;
}

.site-header-nav-secondary {
  padding: 0 var(--layout-gutter) var(--space-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-header-nav-tagline {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.site-header.is-open .site-header-nav {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: scaleY(1);
}

.site-header.is-open .site-header-toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header.is-open .site-header-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.is-open .site-header-toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .site-header-inner {
    padding-block: var(--space-sm);
  }
  .site-header-toggle {
    display: none;
  }
  .site-header-nav {
    position: static;
    inset: auto;
    background: transparent;
    border: 0;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
  .site-header-nav-primary {
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: var(--space-md);
  }
  .site-header-nav-link {
    padding-block: 0.25rem;
    padding-inline: 0.25rem;
    white-space: nowrap;
  }
  .site-header-nav-secondary {
    display: none;
  }
}

@media (max-width: 1023.98px) {
  .site-header-nav {
    max-height: calc(100vh - 3.5rem);
    overflow-y: auto;
  }
}

@media (max-width: 599.98px) {
  .site-header-inner {
    padding-inline: var(--layout-gutter-sm);
  }
}