.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--color-steel-line);
  background: rgba(17, 17, 19, 0.98);
}

.site-header__inner {
  display: flex;
  min-height: 5rem;
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-worn-white);
  text-decoration: none;
}

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

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

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.1rem;
  line-height: 1;
}

.site-header__brand-name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 0.95;
  text-transform: uppercase;
}

.site-header__brand-meta {
  color: var(--color-muted-steel);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
}

.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-head,
.site-header__toggle,
.site-header__nav-mobile-link,
.site-header__nav-cta { display: none; }

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: clamp(0.5rem, 1.4vw, 1.25rem);
  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: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--color-worn-white);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a::before {
  margin-right: 0.35rem;
  color: var(--color-hazard-yellow);
  content: "/";
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-hazard-yellow);
  color: var(--color-worn-white);
}

.site-header__cta,
.site-header__nav-cta {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-hazard-yellow);
  color: var(--color-ink-black);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__cta:hover,
.site-header__nav-cta:hover {
  box-shadow: inset 0 -2px 0 var(--color-hazard-yellow);
  background: var(--color-worn-white);
  color: var(--color-ink-black);
}

.site-header__toggle { margin-left: auto; }

@media (max-width: 75rem) {
  .site-header__inner { min-height: 4.5rem; }
  .site-header__nav,
  .site-header__cta { display: none; }
  .site-header__toggle { display: inline-flex; }

  .site-header__nav.is-open {
    position: fixed;
    z-index: 910;
    top: 0;
    right: 0;
    display: flex;
    width: min(100%, 26rem);
    height: 100dvh;
    min-height: 100vh;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-6);
    overflow-y: auto;
    overflow-x: hidden;
    border-left: 2px solid var(--color-hazard-yellow);
    padding: var(--space-4) var(--space-6) var(--space-8);
    background: var(--color-charcoal);
    box-shadow: var(--shadow-floating);
    animation: site-header-menu-in 180ms ease-out both;
  }

  .site-header__nav-head {
    display: flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: space-between;
    border-bottom: var(--border-default);
    color: var(--color-muted-steel);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.12em;
  }

  .site-header__close {
    display: inline-grid;
    width: 2.75rem;
    min-height: 2.75rem;
    place-items: center;
    border: var(--border-default);
    padding: 0;
    background: transparent;
    color: var(--color-worn-white);
    font-size: 1.75rem;
    line-height: 1;
  }

  .site-header__close:hover {
    border-color: var(--color-hazard-yellow);
    background: var(--color-heavy-grey);
    color: var(--color-worn-white);
    box-shadow: none;
  }

  .site-header__nav-list {
    display: grid;
    gap: 0;
    margin: 0;
    padding: 0;
  }

  .site-header__nav-list a {
    width: 100%;
    min-height: 3rem;
    border-bottom: var(--border-default);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.01em;
  }

  .site-header__nav-list a:hover,
  .site-header__nav-list a[aria-current="page"] {
    border-bottom-color: var(--color-hazard-yellow);
    color: var(--color-hazard-yellow);
  }

  .site-header__nav-mobile-link { display: list-item; }
  .site-header__nav-cta { display: inline-flex; width: 100%; min-height: 3.25rem; margin-top: auto; }
  .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-fast), opacity var(--transition-fast); }
}

@media (max-width: 31.25rem) {
  .site-header__inner { gap: var(--space-2); }
  .site-header__brand { gap: var(--space-2); }
  .site-header__mark { width: 2rem; height: 2rem; flex-basis: 2rem; }
  .site-header__brand-name { font-size: 0.9375rem; }
  .site-header__brand-meta { font-size: 0.5625rem; }
}

@keyframes site-header-menu-in {
  from { opacity: 0; transform: translateX(1.5rem); }
  to { opacity: 1; transform: translateX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav.is-open { animation: none; }
}