.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2xs);
  min-height: 4.5rem;
  padding-block: var(--space-3xs);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--color-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.3125rem;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.4375rem) 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(-0.4375rem) rotate(-45deg);
}

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

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

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

.site-header__nav-list li {
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: inline-block;
  padding-block: var(--space-3xs);
  font-size: var(--text-small);
  line-height: 1;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-ink);
  white-space: nowrap;
  transition: color var(--transition-fast);
  position: relative;
}

.site-header__nav-list a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-copper);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.site-header__nav-list a:hover {
  color: var(--color-copper);
}

.site-header__nav-list a:hover::after,
.site-header__nav-list a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-header__nav-list a:focus-visible {
  outline: var(--outline-focus);
  outline-offset: var(--outline-offset-focus);
}

.site-header__cta {
  flex-shrink: 0;
  margin-inline-start: var(--space-2xs);
}

@media (max-width: 64rem) {
  .site-header__inner {
    flex-wrap: wrap;
    min-height: auto;
    padding-block: var(--space-2xs);
  }

  .site-header__brand {
    flex: 1 1 auto;
    min-width: 0;
  }

  .site-header__toggle {
    display: flex;
    order: 3;
  }

  .site-header__nav {
    display: none;
    order: 4;
    flex-basis: 100%;
    width: 100%;
    background-color: var(--color-background);
    border-top: 1px solid var(--color-border-subtle);
    padding-block: var(--space-2xs);
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
  }

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

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

  .site-header__nav-list li {
    width: 100%;
  }

  .site-header__nav-list a {
    display: block;
    padding: var(--space-2xs) var(--space-3xs);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    letter-spacing: normal;
    text-transform: none;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .site-header__nav-list a::after {
    display: none;
  }

  .site-header__cta {
    order: 2;
    margin-inline-start: 0;
  }
}

@media (max-width: 40rem) {
  .site-header__brand-text {
    font-size: 1rem;
  }

  .site-header__logo {
    width: 2.25rem;
    height: 2.25rem;
  }

  .site-header__cta {
    padding: var(--space-3xs) var(--space-2xs);
    font-size: var(--text-caption);
  }
}