.site-header {
  position: relative;
  z-index: 900;
  min-height: 5.25rem;
  background: var(--color-charcoal-950);
  color: var(--color-text);
}

.site-header__bar {
  min-height: 5.25rem;
  border-bottom: var(--border-width) solid var(--color-steel-700);
  background:
    linear-gradient(90deg, rgba(116, 122, 123, 0.08) 1px, transparent 1px) 0 0 / 3rem 100%,
    var(--color-charcoal-950);
}

.site-header__inner {
  position: relative;
  display: grid;
  min-height: 5.25rem;
  grid-template-columns: minmax(10rem, 1fr) auto minmax(10rem, 1fr);
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  width: fit-content;
  min-width: 0;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-offwhite-100);
  text-decoration: none;
}

.site-header__brand:hover { color: var(--color-offwhite-100); }

.site-header__logo {
  width: 2.625rem;
  height: 2.625rem;
  flex: 0 0 auto;
  object-fit: contain;
}

.site-header__wordmark {
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: var(--weight-extrabold);
  letter-spacing: 0.02em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav {
  grid-column: 2 / 4;
  grid-row: 1;
  min-width: 0;
}

.site-header__nav-panel {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.5rem, 1.4vw, 1.25rem);
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: clamp(0.5rem, 1.2vw, 1rem);
  margin: 0;
  padding: 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: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--color-offwhite-300);
  font-size: 0.8125rem;
  font-weight: var(--weight-semibold);
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-warning-yellow-500);
  color: var(--color-offwhite-100);
}

.site-header__cta {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 0.75rem;
  border: var(--border-width) solid var(--color-warning-yellow-500);
  background: var(--color-warning-yellow-500);
  color: var(--color-charcoal-950);
  font-size: 0.75rem;
  font-weight: var(--weight-bold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.site-header__cta:hover {
  border-color: var(--color-warning-yellow-700);
  background: var(--color-warning-yellow-700);
  color: var(--color-offwhite-100);
  transform: translate(-1px, -1px);
}

.site-header__cta:active { transform: translateY(1px); }

.site-header__toggle,
.site-header__close,
.site-header__mobile-heading,
.site-header__mobile-note { display: none; }

@media (max-width: 1099px) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .site-header__brand { grid-column: 1; }

  .site-header__toggle {
    display: grid;
    width: 3rem;
    height: 3rem;
    grid-column: 2;
    grid-row: 1;
    align-content: center;
    justify-content: center;
    gap: 0.3125rem;
    border: var(--border-width) solid var(--color-steel-700);
    background: var(--color-charcoal-900);
    color: var(--color-offwhite-100);
  }

  .site-header__toggle[aria-expanded="true"] {
    border-color: var(--color-warning-yellow-500);
    background: var(--color-warning-yellow-500);
  }

  .site-header__toggle-line {
    display: block;
    width: 1.25rem;
    height: 2px;
    background: currentColor;
    transition: transform var(--transition-panel), opacity var(--transition-panel);
  }

  .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__nav {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: block;
    overflow-x: hidden;
    overflow-y: auto;
    visibility: hidden;
    background: rgba(8, 9, 10, 0.75);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-panel), visibility var(--transition-panel);
  }

  .site-header__nav.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .site-header__nav-panel {
    display: flex;
    width: min(100%, 34rem);
    min-height: 100%;
    margin-left: auto;
    padding: var(--space-5);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-4);
    border-left: var(--border-strong-width) solid var(--color-steel-500);
    background: var(--color-charcoal-900);
    box-shadow: -6px 0 0 #08090a;
    transform: translateX(100%);
    transition: transform var(--transition-panel);
  }

  .site-header__nav.is-open .site-header__nav-panel { transform: translateX(0); }

  .site-header__mobile-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-bottom: var(--space-4);
    border-bottom: var(--border-width) solid var(--color-steel-700);
  }

  .site-header__mobile-label {
    color: var(--color-offwhite-100);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.04em;
    line-height: 1;
    text-transform: uppercase;
  }

  .site-header__close {
    display: inline-grid;
    width: 3rem;
    height: 3rem;
    place-items: center;
    flex: 0 0 auto;
    border: var(--border-width) solid var(--color-steel-700);
    color: var(--color-offwhite-100);
    font-size: 2rem;
    line-height: 1;
  }

  .site-header__nav-list {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--color-steel-700);
  }

  .site-header__nav-list a {
    min-height: 3.25rem;
    justify-content: flex-start;
    border-bottom: 1px solid var(--color-steel-700);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.01em;
    text-transform: uppercase;
  }

  .site-header__cta {
    width: 100%;
    min-height: 3rem;
    font-size: var(--text-meta);
  }

  .site-header__mobile-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: var(--border-width) solid var(--color-steel-700);
  }

  .site-header__mobile-note-marker {
    width: 0.5rem;
    height: 1.25rem;
    flex: 0 0 auto;
    background: var(--color-warning-yellow-500);
  }

  .site-header__mobile-note p {
    margin: 0;
    color: var(--color-offwhite-300);
    font-size: var(--text-meta);
    line-height: var(--leading-meta);
  }

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

@media (max-width: 767px) {
  .site-header,
  .site-header__bar,
  .site-header__inner { min-height: 4.25rem; }

  .site-header__inner { gap: var(--space-3); }

  .site-header__logo {
    width: 2.125rem;
    height: 2.125rem;
  }

  .site-header__wordmark { font-size: 1.4375rem; }

  .site-header__nav-panel { padding: var(--space-4); }
}

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