.site-header {
  position: relative;
  z-index: 100;
  color: var(--color-warm-pearl);
}

.site-header__utility {
  border-bottom: 1px solid var(--color-steel-border);
  background: var(--color-atlantic-navy);
}

.site-header__utility-inner,
.site-header__inner {
  width: min(100%, var(--container-max));
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.site-header__utility-inner {
  display: flex;
  min-height: 2rem;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-polished-steel);
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tracking-technical);
}

.site-header__marker::before,
.site-header__nav-marker::before {
  display: inline-block;
  width: 0.375rem;
  height: 0.375rem;
  margin-right: var(--space-2);
  border-radius: 50%;
  background: var(--color-sunset-copper);
  content: "";
}

.site-header__utility-copy {
  flex: 1 1 auto;
  overflow: hidden;
  color: var(--color-pearl-mist);
  font-family: var(--font-body);
  font-variant-numeric: normal;
  letter-spacing: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__deck { white-space: nowrap; }

.site-header__bridge {
  border-bottom: 1px solid var(--color-steel-border);
  background: var(--color-navy-transparent);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  gap: var(--space-5);
}

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

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

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

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.125rem;
}

.site-header__brand-name {
  font-size: 0.875rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.13em;
  line-height: 1.1;
  white-space: nowrap;
}

.site-header__brand-tagline {
  color: var(--color-polished-steel);
  font-size: 0.5625rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.09em;
  line-height: 1.2;
  white-space: nowrap;
}

.site-header__controls {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.site-header__cta,
.site-header__nav-cta {
  gap: var(--space-2);
  white-space: nowrap;
}

.site-header__toggle,
.site-header__close,
.site-header__mobile-marker,
.site-header__nav-head,
.site-header__nav-cta { display: none; }

.site-header__nav {
  min-width: 0;
  flex: 1 1 auto;
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.55rem, 1vw, 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: 1px solid transparent;
  color: var(--color-pearl-mist);
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  letter-spacing: 0.07em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

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

.site-header__deck-number { display: none; }

.site-header__scrim { display: none; }

@media (max-width: 1080px) {
  .site-header__nav-list { gap: 0.55rem; }
  .site-header__nav-list a { font-size: 0.625rem; }
}

@media (max-width: 899px) {
  .site-header__utility-copy,
  .site-header__deck,
  .site-header__cta { display: none; }

  .site-header__utility-inner { justify-content: space-between; }

  .site-header__inner { min-height: 4.5rem; }

  .site-header__mobile-marker {
    display: inline-flex;
    color: var(--color-polished-steel);
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    letter-spacing: var(--tracking-technical);
  }

  .site-header__toggle {
    display: inline-flex;
    min-width: 7rem;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    border: 1px solid var(--color-steel-border);
    border-radius: var(--radius-card);
    background: var(--color-deep-teal);
    color: var(--color-warm-pearl);
  }

  .site-header__toggle[aria-expanded="true"] {
    border-color: var(--color-copper-border);
    color: var(--color-copper-light);
  }

  .site-header__toggle-lines {
    display: grid;
    width: 1rem;
    gap: 0.1875rem;
  }

  .site-header__toggle-lines span {
    display: block;
    height: 1px;
    background: currentColor;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:first-child { transform: translateY(4px) 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:last-child { transform: translateY(-4px) rotate(-45deg); }

  .site-header__toggle-text {
    font-size: var(--text-small);
    font-weight: var(--weight-semibold);
  }

  .site-header__nav {
    position: fixed;
    z-index: 102;
    top: 0;
    right: 0;
    display: flex;
    width: min(100%, 28rem);
    height: 100dvh;
    flex-direction: column;
    gap: var(--space-5);
    padding: var(--space-5);
    overflow-y: auto;
    border-left: 1px solid var(--color-copper-border);
    background: var(--color-deep-teal);
    box-shadow: var(--shadow-deep);
    transform: translateX(101%);
    transition: transform var(--transition-panel);
    visibility: hidden;
  }

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

  .site-header__nav-head {
    display: flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    border-bottom: 1px solid var(--color-steel-border);
    padding-bottom: var(--space-3);
  }

  .site-header__nav-marker {
    color: var(--color-polished-steel);
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    letter-spacing: var(--tracking-technical);
  }

  .site-header__close {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    gap: var(--space-2);
    padding: 0.5rem;
    border: 0;
    background: transparent;
    color: var(--color-warm-pearl);
    font-size: var(--text-small);
  }

  .site-header__close span { color: var(--color-copper-light); font-size: 1.5rem; line-height: 1; }

  .site-header__nav-list {
    display: grid;
    align-items: stretch;
    justify-content: stretch;
    gap: 0;
  }

  .site-header__nav-list li { border-bottom: 1px solid var(--color-steel-border); }

  .site-header__nav-list a {
    width: 100%;
    min-height: 3rem;
    gap: var(--space-3);
    border-bottom: 0;
    font-size: var(--text-small);
  }

  .site-header__nav-list a:hover,
  .site-header__nav-list a[aria-current="page"] {
    box-shadow: inset 2px 0 0 var(--color-sunset-copper);
  }

  .site-header__deck-number {
    display: inline-block;
    width: 2rem;
    color: var(--color-polished-steel);
    font-family: var(--font-mono);
    font-size: var(--text-micro);
    letter-spacing: var(--tracking-technical);
  }

  .site-header__nav-cta { display: inline-flex; align-self: flex-start; }

  .site-header__scrim {
    position: fixed;
    z-index: 101;
    inset: 0;
    background: rgba(5, 18, 29, 0.7);
  }

  .site-header__scrim.is-visible { display: block; }

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

@media (max-width: 420px) {
  .site-header__utility { display: none; }
  .site-header__inner { min-height: 4.25rem; gap: var(--space-2); }
  .site-header__logo { width: 2rem; height: 2rem; flex-basis: 2rem; }
  .site-header__brand { gap: var(--space-2); }
  .site-header__brand-name { font-size: 0.75rem; letter-spacing: 0.1em; }
  .site-header__brand-tagline,
  .site-header__mobile-marker { display: none; }
  .site-header__toggle { min-width: 2.75rem; padding-inline: 0.625rem; }
  .site-header__toggle-text { display: none; }
}

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