.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  width: 100%;
  border-bottom: var(--border-muted);
  background: rgba(16, 20, 22, 0.96);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  gap: var(--space-5);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 10px;
  color: var(--color-stone-100);
  text-decoration: none;
}

.site-header__brand:hover { color: var(--color-stone-100); text-decoration: none; }

.site-header__mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  object-fit: contain;
}

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 1px;
  line-height: 1;
}

.site-header__brand-name {
  overflow: hidden;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__brand-descriptor {
  color: var(--color-stone-300);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-header__toggle { display: none; margin-left: auto; }

.site-header__nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: clamp(10px, 1.35vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none !important;
}

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

.site-header__nav-list a {
  display: block;
  padding: 8px 0;
  color: var(--color-stone-300);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] { color: var(--color-bronze-300); text-decoration: underline; }
.site-header__action { flex: 0 0 auto; min-height: 44px; padding: 10px 16px; white-space: nowrap; }

@media (max-width: 1120px) {
  .site-header__inner { min-height: 64px; }
  .site-header__toggle { display: flex; }
  .site-header__nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    width: 100%;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    border-bottom: var(--border-accent);
    background: var(--color-graphite-900);
    padding: var(--space-5) var(--container-padding);
    justify-content: center;
    align-items: stretch;
  }
  .site-header__nav.is-open {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    justify-content: stretch;
    justify-items: stretch;
    gap: var(--space-5);
  }
  .site-header__nav-list {
    display: grid;
    width: 100%;
    gap: 0;
    justify-items: stretch;
    text-align: center;
  }
  .site-header__nav-list li {
    width: 100%;
    border-bottom: var(--border-muted);
    text-align: center;
  }
  .site-header__nav-list a {
    display: block;
    width: 100%;
    padding: 14px 0;
    color: var(--color-stone-100);
    text-align: center;
  }
  .site-header__action {
    display: block;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    min-height: 48px;
    text-align: center;
  }
  .site-header__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-header__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .site-header__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-header__toggle span { transition: transform var(--transition-base), opacity var(--transition-base); }
}

@media (max-width: 767px) {
  .site-header__inner { gap: var(--space-3); }
  .site-header__mark { width: 30px; height: 30px; flex-basis: 30px; }
  .site-header__brand-name { font-size: 14px; }
  .site-header__brand-descriptor { display: none; }
  .site-header__nav { padding-inline: var(--container-padding); }
}