.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-walnut);
  color: var(--color-cream);
  border-bottom: 1px solid rgba(245, 240, 230, 0.15);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 72px;
  padding-block: var(--space-sm);
}

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

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-cream);
  text-decoration: none;
}

.site-header__brand:focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-duration) var(--transition-ease);
}

.site-header__toggle:hover {
  background-color: rgba(245, 240, 230, 0.1);
}

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

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-cream);
  border-radius: 1px;
  transition: transform var(--transition-duration) var(--transition-ease),
    opacity var(--transition-duration) var(--transition-ease);
}

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

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

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

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

.site-header__nav-link {
  display: inline-block;
  padding-block: var(--space-sm);
  color: var(--color-cream);
  text-decoration: none;
  font-size: var(--text-body-size);
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
  transition: color var(--transition-duration) var(--transition-ease);
  position: relative;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background-color: var(--color-burgundy);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-duration) var(--transition-ease);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-cream);
  text-decoration: none;
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

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

@media (max-width: 900px) {
  .site-header__inner {
    flex-wrap: wrap;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    display: none;
    width: 100%;
    order: 10;
    background-color: var(--color-walnut);
    border-top: 1px solid rgba(245, 240, 230, 0.15);
    padding-block: var(--space-sm);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

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

  .site-header__nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    white-space: normal;
    border-radius: var(--radius-sm);
  }

  .site-header__nav-link::after {
    display: none;
  }

  .site-header__nav-link:hover,
  .site-header__nav-link:focus-visible {
    background-color: rgba(245, 240, 230, 0.1);
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    min-height: 64px;
    padding-block: var(--space-xs);
  }

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

  .site-header__brand-text {
    font-size: 1.125rem;
  }

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