.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  min-width: 0;
  border-block-end: 1px solid rgba(200, 199, 209, 0.14);
  background: rgba(7, 8, 17, 0.8);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-width: 0;
  min-height: 5.5rem;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-4);
}

.site-header__aurora,
.site-footer__aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.site-header__aurora-orb {
  position: absolute;
  width: 13rem;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(54px);
  opacity: 0.18;
  animation: site-header-aurora 22s ease-in-out infinite alternate;
}

.site-header__aurora-orb--indigo { top: -8rem; left: 8%; background: var(--color-indigo-500); }
.site-header__aurora-orb--violet { top: -9rem; left: 45%; background: var(--color-violet-500); animation-delay: -7s; }
.site-header__aurora-orb--pink { right: 4%; bottom: -9rem; background: var(--color-pink-500); animation-delay: -13s; }

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-self: center;
  gap: 0.625rem;
  color: var(--color-platinum-100);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__brand:hover { color: var(--color-platinum-100); }

.site-header__logo {
  width: 2.625rem;
  height: 2.625rem;
  flex: 0 0 2.625rem;
  object-fit: contain;
}

.site-header__brand-text { min-width: 0; }

.site-header__nav,
.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
}

.site-header__nav--left { justify-content: flex-start; }
.site-header__nav--right { justify-content: flex-end; gap: var(--space-3); }

.site-header__nav-list,
.site-header__mobile-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list {
  flex-wrap: nowrap;
  gap: clamp(0.75rem, 1.4vw, 1.25rem);
}

.site-header__nav-list li,
.site-header__mobile-list li,
.site-header__nav-list li + li,
.site-header__mobile-list li + li { margin: 0; }

.site-header__nav-list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: var(--color-platinum-300);
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 650;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-list a[aria-current="page"],
.site-header__nav-list a:hover {
  color: var(--color-platinum-100);
}

.site-header__nav-list a[aria-current="page"]::after {
  width: 100%;
}

.site-header__nav-list a::after {
  display: block;
  width: 0;
  height: 1px;
  margin-top: 1.65rem;
  margin-left: -100%;
  background: var(--color-cyan-400);
  content: "";
  transition: width var(--transition-fast);
}

.site-header__cta {
  min-height: 2.625rem;
  padding-inline: 0.875rem;
  font-size: 0.75rem;
  white-space: nowrap;
}

.site-header__toggle,
.site-header__mobile-nav { display: none; }

@keyframes site-header-aurora {
  from { transform: translate3d(-3%, -4%, 0) scale(0.94); }
  to { transform: translate3d(6%, 5%, 0) scale(1.08); }
}

@media (max-width: 980px) {
  .site-header__inner {
    min-height: 4.75rem;
    grid-template-columns: 1fr auto 1fr;
  }

  .site-header__nav { display: none; }

  .site-header__toggle {
    display: inline-flex;
    width: 3rem;
    height: 3rem;
    justify-self: end;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3125rem;
    border: 1px solid rgba(200, 199, 209, 0.22);
    border-radius: var(--radius-md);
    background: rgba(18, 20, 40, 0.72);
  }

  .site-header__toggle:hover { border-color: rgba(87, 217, 232, 0.72); box-shadow: var(--shadow-glow); }

  .site-header__toggle-line {
    width: 1.125rem;
    height: 1px;
    background: var(--color-platinum-100);
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) { transform: translateY(0.375rem) rotate(45deg); }
  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) { opacity: 0; }
  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) { transform: translateY(-0.375rem) rotate(-45deg); }

  .site-header__mobile-nav {
    position: fixed;
    z-index: 1001;
    top: 4.75rem;
    right: 0;
    bottom: 0;
    display: block;
    width: min(100%, 27rem);
    overflow-y: auto;
    border-inline-start: var(--border-subtle);
    background: rgba(13, 16, 32, 0.96);
    box-shadow: var(--shadow-float);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
  }

  .site-header__mobile-nav[hidden] { display: none; }

  .site-header__mobile-nav-inner {
    display: flex;
    min-height: 100%;
    flex-direction: column;
    gap: var(--space-6);
    padding: var(--space-7) var(--container-padding);
  }

  .site-header__mobile-label {
    margin: 0;
    color: var(--color-cyan-400);
    font-family: var(--font-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .site-header__mobile-list {
    display: grid;
    gap: var(--space-1);
  }

  .site-header__mobile-list a {
    display: flex;
    min-height: 3.25rem;
    align-items: center;
    padding-inline: var(--space-3);
    border-block-end: 1px solid rgba(200, 199, 209, 0.13);
    color: var(--color-platinum-100);
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 650;
    text-decoration: none;
  }

  .site-header__mobile-list a:hover,
  .site-header__mobile-list a[aria-current="page"] { color: var(--color-cyan-400); }
  .site-header__mobile-cta { width: 100%; margin-top: auto; }
  body.site-header-menu-open { overflow: hidden; }
}

@media (max-width: 560px) {
  .site-header__inner { min-height: 4.5rem; gap: var(--space-2); }
  .site-header__brand { gap: 0.5rem; font-size: 0.9375rem; }
  .site-header__logo { width: 2.25rem; height: 2.25rem; flex-basis: 2.25rem; }
  .site-header__toggle { width: 2.875rem; height: 2.875rem; }
  .site-header__mobile-nav { top: 4.5rem; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__aurora-orb { animation: none; }
}