.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-bottom: var(--border-default);
  background: rgba(245, 244, 240, 0.97);
  color: var(--color-ink);
}

.site-header__inner {
  display: flex;
  width: min(100% - (2 * var(--container-gutter)), var(--container-max));
  min-height: 4.5rem;
  margin-inline: auto;
  align-items: center;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
  text-decoration: none;
}

.site-header__brand:hover { color: var(--color-ink); }

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

.site-header__brand-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__brand-short { display: none; }

.site-header__toggle {
  display: inline-flex;
  width: 2.75rem;
  min-height: 2.75rem;
  flex: 0 0 2.75rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: transparent;
}

.site-header__toggle-line {
  display: block;
  width: 1.15rem;
  height: 1px;
  background: 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(0.4rem) 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(-0.4rem) rotate(-45deg); }

.site-header__navigation {
  position: fixed;
  z-index: 101;
  top: 4.5rem;
  right: 0;
  left: 0;
  display: none;
  max-height: calc(100dvh - 4.5rem);
  padding: var(--space-5) var(--container-gutter) var(--space-6);
  overflow-y: auto;
  border-bottom: var(--border-default);
  background: var(--surface-page);
}

.site-header__navigation.is-open { display: flex; flex-direction: column; gap: var(--space-5); }

.site-header__nav-list {
  display: flex;
  margin: 0;
  padding: 0;
  flex-direction: column;
  gap: 0;
  list-style: none;
}

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

.site-header__nav-list a {
  display: block;
  padding: 0.85rem 0;
  border-bottom: var(--border-default);
  color: var(--color-ink);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-medium);
  line-height: 1.3;
  text-decoration: none;
}

.site-header__contact { width: 100%; }

@media (max-width: 23rem) {
  .site-header__brand-full { display: none; }
  .site-header__brand-short { display: inline; }
}

@media (min-width: 68rem) {
  .site-header__inner { min-height: 5rem; gap: var(--space-5); }
  .site-header__brand { flex: 0 1 auto; }
  .site-header__logo { width: 2.625rem; height: 2.625rem; flex-basis: 2.625rem; }
  .site-header__toggle { display: none; }
  .site-header__navigation {
    position: static;
    display: flex;
    min-width: 0;
    max-height: none;
    margin-left: auto;
    padding: 0;
    overflow: visible;
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-4);
    border: 0;
    background: transparent;
  }
  .site-header__nav-list {
    min-width: 0;
    flex-direction: row;
    align-items: center;
    gap: clamp(0.7rem, 1.25vw, 1.25rem);
  }
  .site-header__nav-list a {
    padding: 0.5rem 0;
    border: 0;
    white-space: nowrap;
  }
  .site-header__contact { width: auto; flex: 0 0 auto; white-space: nowrap; }
}

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