.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-ivory-raised);
  border-bottom: 1px solid var(--color-navy-ink);
  min-height: 72px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  min-height: 72px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  text-decoration: none;
  color: var(--color-navy-ink);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-royal-violet);
  line-height: 1.2;
  white-space: nowrap;
}

.site-header__brand-descriptor {
  font-family: var(--font-body);
  font-size: var(--text-pixel-label-size);
  font-weight: var(--text-pixel-label-weight);
  line-height: var(--text-pixel-label-leading);
  letter-spacing: var(--text-pixel-label-tracking);
  text-transform: uppercase;
  color: var(--color-navy-muted);
  white-space: nowrap;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-shrink: 0;
}

.site-header__search {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background-color: var(--color-ivory-raised);
  border: var(--border-navy-20);
  border-radius: var(--radius-default);
  padding-inline: var(--space-8);
  min-height: 44px;
  width: 220px;
  transition: border-color var(--transition-fast);
}

.site-header__search:hover,
.site-header__search:focus-within {
  border-color: var(--color-emerald-ink);
}

.site-header__search-input {
  flex: 1 1 auto;
  min-width: 0;
  border: none;
  background: transparent;
  padding: 0;
  font-size: var(--text-small-size);
  color: var(--color-navy-ink);
  outline: none;
}

.site-header__search-input::placeholder {
  color: var(--color-navy-muted);
  opacity: 1;
}

.site-header__search-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-navy-muted);
  border-radius: var(--radius-default);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__search-button:hover {
  color: var(--color-emerald-ink);
  background-color: var(--color-violet-soft);
}

.site-header__search-button:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.site-header__search-icon {
  display: block;
}

.site-header__menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-default);
  background-color: transparent;
  color: var(--color-navy-ink);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-header__menu-toggle:hover {
  background-color: var(--color-violet-soft);
  color: var(--color-emerald-ink);
}

.site-header__menu-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.site-header__menu-toggle[aria-expanded="true"] {
  background-color: var(--color-violet-soft);
  color: var(--color-emerald-ink);
}

.site-header__menu-toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 20px;
  height: 16px;
}

.site-header__menu-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-header__nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-8) 0;
  font-family: var(--font-body);
  font-size: var(--text-pixel-label-size);
  font-weight: var(--text-pixel-label-weight);
  line-height: var(--text-pixel-label-leading);
  letter-spacing: var(--text-pixel-label-tracking);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-navy-ink);
  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-emerald-ink);
  border-bottom-color: var(--color-emerald-ink);
}

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

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

@media (max-width: 1023px) {
  .site-header__inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-block: var(--space-8);
  }

  .site-header__brand {
    order: 1;
    flex: 1 1 auto;
  }

  .site-header__logo {
    width: 36px;
    height: 36px;
  }

  .site-header__actions {
    order: 2;
    flex: 0 0 auto;
  }

  .site-header__search {
    width: 180px;
  }

  .site-header__menu-toggle {
    display: inline-flex;
  }

  .site-header__nav {
    order: 3;
    flex-basis: 100%;
    width: 100%;
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-ivory-raised);
    border-bottom: 1px solid var(--color-navy-ink);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    z-index: 1001;
  }

  .site-header__nav.is-open {
    display: block;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-8) 0;
  }

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    padding: var(--space-12) var(--container-padding-mobile);
    border-bottom: none;
    border-inline-start: 2px solid transparent;
  }

  .site-header__nav-link:hover,
  .site-header__nav-link[aria-current="page"] {
    border-inline-start-color: var(--color-emerald-ink);
    border-bottom-color: transparent;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    gap: var(--space-8);
  }

  .site-header__brand-text {
    gap: 0;
  }

  .site-header__brand-name {
    font-size: 1rem;
  }

  .site-header__brand-descriptor {
    font-size: 0.5625rem;
  }

  .site-header__search {
    width: 140px;
  }

  .site-header__search-input {
    font-size: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__menu-toggle-bar,
  .site-header__nav-link,
  .site-header__search-button {
    transition: none;
  }
}