.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-bottom: var(--border-default);
  background: rgb(239 234 225 / 96%);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  width: var(--container-width);
  max-width: var(--container-max);
  min-height: 4.75rem;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  margin-inline: auto;
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}

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

.site-header__logo {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__wordmark {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  text-overflow: ellipsis;
}

.site-header__nav {
  min-width: 0;
  margin-left: auto;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.6vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list li,
.site-header__nav-list li + li {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
}

.site-header__nav-list a,
.site-header__contact {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: var(--color-ink);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__contact:hover {
  color: var(--color-mauve-deep);
  text-decoration: underline;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.22em;
}

.site-header__contact {
  flex: 0 0 auto;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  padding-inline: 0.875rem;
}

.site-header__contact:hover {
  border-color: var(--color-mauve-deep);
  background: rgb(154 140 152 / 16%);
  text-decoration: none;
}

.site-header__toggle,
.site-header__nav-item--mobile {
  display: none;
}

.site-header__toggle {
  width: 2.75rem;
  min-width: 2.75rem;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--color-paper-raised);
}

.site-header__toggle-lines {
  display: grid;
  width: 1.125rem;
  gap: 0.25rem;
}

.site-header__toggle-lines span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-ink);
  transition: transform 160ms ease, opacity 160ms ease;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(1) {
  transform: translateY(0.3125rem) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(3) {
  transform: translateY(-0.3125rem) rotate(-45deg);
}

@media (max-width: 68rem) {
  .site-header__inner {
    min-height: 4rem;
  }

  .site-header__nav,
  .site-header__contact {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__nav.is-open {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: max(1rem, calc((100vw - var(--container-max)) / 2));
    left: max(1rem, calc((100vw - var(--container-max)) / 2));
    display: block;
    max-height: calc(100vh - 5.5rem);
    overflow-y: auto;
    border: var(--border-default);
    border-radius: var(--radius-md);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-surface);
  }

  .site-header__nav-list {
    display: grid;
    gap: 0;
    padding: var(--space-2);
  }

  .site-header__nav-list li,
  .site-header__nav-list li + li {
    display: block;
  }

  .site-header__nav-list a {
    display: flex;
    min-height: 2.75rem;
    padding: 0.75rem var(--space-3);
    border-radius: var(--radius-xs);
  }

  .site-header__nav-list a:hover {
    background: rgb(154 140 152 / 16%);
    text-decoration: none;
  }

  .site-header__nav-item--mobile {
    display: block;
  }

  body.site-header-menu-open {
    overflow: hidden;
  }
}

@media (max-width: 23rem) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__brand {
    gap: 0.5rem;
  }

  .site-header__logo {
    width: 1.875rem;
    height: 1.875rem;
    flex-basis: 1.875rem;
  }

  .site-header__wordmark {
    font-size: 1.0625rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-lines span {
    transition: none;
  }
}