.site-header {
  position: relative;
  z-index: 100;
  padding: var(--space-2) var(--gutter) 0;
}

.site-header__shell {
  display: flex;
  width: min(100%, var(--container-wide));
  min-height: 4.75rem;
  margin-inline: auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--color-pearl-50);
  box-shadow: var(--shadow-raised);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 13.5rem;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-navy-950);
  text-decoration: none;
}

.site-header__brand:hover { color: var(--color-emerald-700); }

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

.site-header__brand-text {
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: 0.055em;
  line-height: 0.94;
  text-transform: uppercase;
}

.site-header__nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: clamp(0.45rem, 1vw, 0.9rem);
  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 {
  position: relative;
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: var(--color-navy-950);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.035em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav-list a::after {
  position: absolute;
  right: 0;
  bottom: 0.2rem;
  left: 0;
  height: 3px;
  border-radius: 2px;
  background: var(--color-emerald-700);
  content: "";
  opacity: 0;
  transform: scaleX(0.45);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] { color: var(--color-emerald-700); }
.site-header__nav-list a:hover::after,
.site-header__nav-list a[aria-current="page"]::after { opacity: 1; transform: scaleX(1); }

.site-header__cta { flex: 0 0 auto; white-space: nowrap; }

.site-header__toggle { display: none; }

@media (max-width: 73rem) {
  .site-header__nav-more { display: none; }
}

@media (max-width: 58rem) {
  .site-header { padding-inline: var(--space-2); }
  .site-header__shell { position: relative; min-height: 4.25rem; padding: var(--space-2) var(--space-3); }
  .site-header__brand { flex-basis: auto; margin-right: auto; }
  .site-header__mark { width: 2.25rem; height: 2.25rem; flex-basis: 2.25rem; }
  .site-header__brand-text { font-size: 0.9rem; }

  .site-header__toggle {
    display: inline-flex;
    width: 2.75rem;
    min-width: 2.75rem;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: var(--color-pearl-50);
  }

  .site-header__toggle-lines { display: grid; width: 1.25rem; gap: 0.22rem; }
  .site-header__toggle-lines span { display: block; height: 2px; border-radius: 2px; background: var(--color-navy-950); transition: transform var(--transition-fast), opacity var(--transition-fast); }
  .site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(1) { transform: translateY(0.44rem) 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:nth-child(3) { transform: translateY(-0.44rem) rotate(-45deg); }

  .site-header__nav {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    padding: var(--space-3);
    border: var(--border-default);
    border-radius: var(--radius-lg);
    background: var(--color-pearl-50);
    box-shadow: var(--shadow-raised);
  }

  .site-header__nav.is-open { display: block; }
  .site-header__nav-list { display: grid; gap: 0; }
  .site-header__nav-more { display: block; }
  .site-header__nav-list a { width: 100%; min-height: 3rem; padding-inline: var(--space-3); border-bottom: 1px solid var(--color-line); }
  .site-header__nav-list a::after { right: auto; bottom: 0; left: var(--space-3); width: 2rem; }
  .site-header__cta { width: 100%; margin-top: var(--space-3); }
}

@media (max-width: 30rem) {
  .site-header__brand-text { font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-lines span,
  .site-header__nav-list a::after { transition: none; }
}