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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-block: var(--space-3xs);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  text-decoration: none;
  color: var(--color-paper);
  flex-shrink: 0;
}

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

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--text-h4);
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-paper);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle-icon {
  position: relative;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: '';
  position: absolute;
  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 {
  transform: translateY(8px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

.site-header__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.site-header__nav {
  display: block;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-3xs) var(--space-2xs);
  font-size: var(--text-small);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-paper);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-link:hover {
  color: var(--color-wine);
  border-bottom-color: var(--color-wine);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

@media (max-width: 767px) {
  .site-header__inner {
    min-height: 56px;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-text {
    font-size: var(--text-h4);
  }

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

  .site-header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(85vw, 320px);
    max-width: 100%;
    background-color: var(--color-ink);
    border-left: var(--border-hairline);
    padding: var(--space-sm);
    transform: translateX(100%);
    transition: transform var(--transition-fast);
    overflow-y: auto;
    z-index: 1001;
    visibility: hidden;
  }

  .site-header__nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3xs);
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-2xs);
    border-bottom: none;
    font-size: var(--text-body);
  }

  .site-header__nav-link:hover {
    border-bottom: none;
    background-color: rgba(255, 255, 255, 0.05);
  }

  .site-header__nav-link[aria-current="page"] {
    border-bottom: none;
    background-color: rgba(255, 255, 255, 0.05);
  }
}