.site-header {
  position: relative;
  z-index: 100;
  min-height: 4.5rem;
  border-bottom: var(--border-default);
  background: var(--color-surface);
  color: var(--color-ink);
}

.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-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-self: center;
  gap: 0.5rem;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

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

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

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

.site-header__desktop-nav ul {
  align-items: center;
  gap: clamp(0.65rem, 1.35vw, 1.35rem);
}

.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: 2.75rem;
  align-items: center;
  border-bottom: 3px solid transparent;
  color: var(--color-ink);
  font-size: var(--text-small);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__desktop-nav a:hover,
.site-header__desktop-nav a[aria-current="page"] {
  border-bottom-color: var(--color-action);
  color: var(--color-action-dark);
}

.site-header__desktop-nav--left {
  justify-self: start;
}

.site-header__right {
  display: flex;
  min-width: 0;
  justify-self: end;
  align-items: center;
}

.site-header__desktop-nav--right {
  justify-self: end;
}

.site-header__toggle {
  display: none;
  width: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: var(--border-default);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  color: var(--color-ink);
  padding: 0;
}

.site-header__toggle:hover,
.site-header__toggle[aria-expanded="true"] {
  border-color: var(--color-action);
  background: var(--color-canvas);
}

.site-header__toggle-lines {
  display: grid;
  width: 1.25rem;
  gap: 0.25rem;
}

.site-header__toggle-lines span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.site-header__mobile-nav {
  position: absolute;
  z-index: 110;
  top: 100%;
  right: 0;
  left: 0;
  max-height: calc(100vh - 3.75rem);
  overflow-y: auto;
  border-top: var(--border-default);
  border-bottom: var(--border-default);
  background: var(--color-surface);
  box-shadow: var(--shadow-elevated);
}

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

.site-header__mobile-nav-inner {
  width: min(100% - 2rem, 42rem);
  margin-inline: auto;
  padding: var(--space-5) 0 var(--space-6);
}

.site-header__menu-label {
  margin: 0 0 var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-meta);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-header__mobile-nav ul {
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-5);
}

.site-header__mobile-nav a {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
}

.site-header__mobile-nav a:hover,
.site-header__mobile-nav a[aria-current="page"] {
  color: var(--color-action-dark);
}

.site-header__search {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2);
  margin: 0;
}

.site-header__search input { margin: 0; }

.site-header__search button {
  min-height: 2.75rem;
  border-radius: var(--radius-card);
  background: var(--color-action);
  color: var(--color-surface);
  padding: 0.625rem 1rem;
  font-size: var(--text-small);
  font-weight: 700;
}

.site-header__search button:hover { background: var(--color-action-dark); }

@media (max-width: 56.1875rem) {
  .site-header { min-height: 3.75rem; }
  .site-header__inner { min-height: 3.75rem; grid-template-columns: 2.75rem 1fr 2.75rem; }
  .site-header__desktop-nav { display: none; }
  .site-header__right { grid-column: 3; }
  .site-header__toggle { display: inline-flex; }
  .site-header__brand { grid-column: 2; font-size: 1rem; }
  .site-header__brand img { width: 2.125rem; height: 2.125rem; }
}

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