.site-header {
  position: sticky;
  z-index: 200;
  top: 0;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-void-elevated);
}

.site-header__shell {
  min-height: 4.5rem;
}

.site-header__inner {
  display: grid;
  min-height: 4.5rem;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-4);
}

.site-header__primary {
  min-width: 0;
}

.site-header__primary--right {
  justify-self: end;
}

.site-header__list,
.site-header__mobile-list {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__list {
  align-items: center;
  gap: clamp(0.75rem, 1.8vw, 1.5rem);
}

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

.site-header__list a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__list a:hover,
.site-header__list a:focus-visible,
.site-header__list a[aria-current="page"] {
  color: var(--color-bio-signal);
}

.site-header__list a[aria-current="page"]::after {
  width: 0.35rem;
  height: 0.35rem;
  margin-left: var(--space-2);
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-self: center;
  gap: 0.625rem;
  color: var(--color-text-primary);
  text-decoration: none;
}

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-bio-signal);
}

.site-header__mark {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 0.95;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  justify-self: end;
  gap: 5px;
  padding: 0;
  background: transparent;
  color: var(--color-text-primary);
}

.site-header__toggle-line {
  display: block;
  width: 21px;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] {
  color: var(--color-bio-signal);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

.site-header__mobile-nav {
  position: fixed;
  z-index: 190;
  top: 4.5rem;
  right: 0;
  left: 0;
  max-height: calc(100dvh - 4.5rem);
  overflow-y: auto;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-void-elevated);
  box-shadow: var(--shadow-elevation);
}

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

.site-header__mobile-head,
.site-header__mobile-list {
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
}

.site-header__mobile-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.site-header__mobile-label {
  color: var(--color-text-secondary);
  font-family: var(--font-heading);
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header__mobile-head .status {
  font-size: var(--text-meta);
}

.site-header__mobile-list {
  flex-direction: column;
  padding-block: var(--space-3) var(--space-5);
}

.site-header__mobile-list a {
  display: flex;
  min-height: 48px;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-size: var(--text-nav);
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.25;
  text-decoration: none;
  text-transform: uppercase;
}

.site-header__mobile-list a:hover,
.site-header__mobile-list a:focus-visible,
.site-header__mobile-list a[aria-current="page"] {
  color: var(--color-bio-signal);
}

.site-header__mobile-list a[aria-current="page"]::before {
  width: 0.5rem;
  height: 0.5rem;
  flex: 0 0 auto;
  margin-right: var(--space-3);
  border-radius: 50%;
  background: var(--color-bio-signal);
  content: "";
}

@media (max-width: 999px) {
  .site-header__inner {
    grid-template-columns: 44px auto 44px;
    justify-content: center;
  }

  .site-header__primary {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
    flex-direction: column;
  }
}

@media (max-width: 639px) {
  .site-header__shell,
  .site-header__inner {
    min-height: 4rem;
  }

  .site-header__mark {
    width: 1.875rem;
    height: 1.875rem;
    flex-basis: 1.875rem;
  }

  .site-header__brand-text {
    font-size: 0.75rem;
  }

  .site-header__mobile-nav {
    top: 4rem;
    max-height: calc(100dvh - 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-line {
    transition: none;
  }
}