.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 76px;
  border-bottom: 1px solid rgba(241, 245, 249, 0.1);
  background: rgba(9, 10, 15, 0.9);
  backdrop-filter: blur(18px) saturate(125%);
  -webkit-backdrop-filter: blur(18px) saturate(125%);
}

.site-header__inner {
  position: relative;
  display: flex;
  height: 100%;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
}

.site-header__brand {
  position: absolute;
  left: 50%;
  z-index: 2;
  display: inline-flex;
  max-width: calc(100% - 22rem);
  min-width: 0;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.site-header__logo {
  width: 40px;
  min-width: 40px;
  height: 40px;
  object-fit: contain;
}

.site-header__brand-text {
  min-width: 0;
  overflow-wrap: normal;
  white-space: nowrap;
}

.site-header__desktop-nav {
  min-width: 0;
}

.site-header__desktop-nav ul,
.site-header__mobile-nav ul {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none !important;
}

.site-header__desktop-nav ul {
  align-items: center;
  gap: clamp(0.75rem, 1.6vw, 1.5rem);
}

.site-header__desktop-nav li,
.site-header__mobile-nav li,
.site-header__desktop-nav li + li,
.site-header__mobile-nav li + li {
  margin: 0;
  padding: 0;
}

.site-header__desktop-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__desktop-nav a:hover,
.site-header__desktop-nav a:focus-visible {
  color: var(--color-text-primary);
}

.site-header__cta {
  min-height: 38px !important;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-aurora-violet);
  border-radius: var(--radius-md);
  background: var(--color-aurora-violet);
  color: var(--color-text-primary) !important;
}

.site-header__cta:hover {
  border-color: var(--color-aurora-violet-hover);
  background: var(--color-aurora-violet-hover);
}

.nav-toggle.site-header__toggle {
  display: none;
  flex-direction: column;
}

.site-header__mobile-layer {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 999;
  height: calc(100vh - 76px);
  height: calc(100dvh - 76px);
  overflow: hidden;
  background: rgba(9, 10, 15, 0.68);
}

.site-header__mobile-layer[hidden] {
  display: none !important;
}

body.site-mobile-nav-open {
  overflow: hidden;
}

.site-header__mobile-nav {
  width: min(100%, 28rem);
  height: 100%;
  margin-left: auto;
  padding: 1.5rem max(1.25rem, env(safe-area-inset-right)) 2rem;
  overflow-y: auto;
  border-left: 1px solid rgba(139, 92, 246, 0.42);
  background: rgba(14, 16, 23, 0.98);
  box-shadow: var(--shadow-deep);
  transform: translateX(0);
}

.site-header__mobile-nav-head {
  margin-bottom: 1rem;
  color: var(--color-warm-copper);
  font-family: var(--font-heading);
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.site-header__mobile-nav ul {
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.site-header__mobile-nav a:not(.site-header__mobile-cta) {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(241, 245, 249, 0.08);
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-weight: 600;
  text-decoration: none;
}

.site-header__mobile-cta {
  width: 100%;
}

.site-header[data-menu-open] .nav-toggle > span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-menu-open] .nav-toggle > span:nth-child(2) {
  opacity: 0;
}

.site-header[data-menu-open] .nav-toggle > span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 64rem) {
  .site-header__desktop-nav ul {
    gap: 0.75rem;
  }

  .site-header__desktop-nav a {
    font-size: 0.75rem;
  }
}

@media (max-width: 51.25rem) {
  .site-header {
    height: 64px;
  }

  .site-header__desktop-nav {
    display: none;
  }

  .nav-toggle.site-header__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__brand {
    max-width: calc(100% - 5.5rem);
    gap: 0.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
  }

  .site-header__logo {
    width: 34px;
    min-width: 34px;
    height: 34px;
  }

  .site-header__mobile-layer {
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
  }
}

@media (max-width: 23rem) {
  .site-header__brand-text {
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .site-header__mobile-layer {
    animation: site-header-fade-in var(--transition-base);
  }

  .site-header__mobile-nav {
    animation: site-header-slide-in var(--transition-base);
  }

  @keyframes site-header-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes site-header-slide-in {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
  }
}