.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--surface-base);
  border-bottom: var(--border-width) solid var(--border-hairline);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
  min-height: 80px;
}

.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__nav--left {
  justify-content: flex-start;
}

.site-header__nav--right {
  justify-content: flex-end;
}

.site-header__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__item {
  margin: 0;
  padding: 0;
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-2);
  color: var(--text-primary);
  font: 700 14px/1.5 var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__link:hover {
  color: var(--accent-action);
  text-decoration: underline;
}

.site-header__link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  min-width: 0;
  flex-shrink: 0;
}

.site-header__brand:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.site-header__brand-text {
  font: 700 18px/1.2 var(--font-heading);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  position: relative;
}

.site-header__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  position: absolute;
  transition: background-color 0.2s ease;
}

.site-header__toggle-icon {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  left: 0;
}

.site-header__toggle-icon::before {
  top: -8px;
}

.site-header__toggle-icon::after {
  top: 8px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-header__mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  width: 100%;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  background-color: var(--surface-base);
  border-bottom: var(--border-width) solid var(--border-hairline);
  z-index: 999;
  padding: var(--space-4) var(--container-gutter);
  box-sizing: border-box;
}

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

.site-header__mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-header__mobile-item {
  margin: 0;
  padding: 0;
}

.site-header__mobile-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  font: 700 16px/1.5 var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: var(--border-width) solid transparent;
}

.site-header__mobile-link:hover {
  color: var(--accent-action);
  border-bottom-color: var(--accent-action);
  text-decoration: none;
}

.site-header__mobile-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--space-3);
    padding-inline: var(--container-gutter);
  }

  .site-header__nav {
    display: none;
  }

  .site-header__brand {
    justify-self: center;
  }

  .site-header__toggle {
    display: inline-flex;
    justify-self: end;
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: 16px;
  }
}

@media (max-width: 768px) {
  .site-header__inner {
    min-height: 64px;
    padding-inline: var(--container-gutter);
  }

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

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-icon,
  .site-header__toggle-icon::before,
  .site-header__toggle-icon::after {
    transition: none;
  }
}