.site-header {
  position: relative;
  z-index: 100;
  width: 100%;
  border-bottom: var(--border-rule);
  background: var(--color-paper);
  color: var(--color-ink);
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  width: min(100% - (var(--gutter) * 2), var(--container-max));
  min-height: 4.75rem;
  margin-inline: auto;
  gap: var(--space-3);
}

.site-header__left,
.site-header__right {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: var(--space-4);
}

.site-header__right {
  justify-content: flex-end;
}

.site-header__brand,
.site-header__mobile-brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  color: var(--color-ink);
  text-decoration: none;
}

.site-header__brand {
  justify-self: center;
  gap: var(--space-2);
  white-space: nowrap;
}

.site-header__brand img {
  flex: 0 0 2.125rem;
  width: 2.125rem;
  height: 2.125rem;
  object-fit: contain;
}

.site-header__wordmark,
.site-header__mobile-brand span {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.site-header__desktop-nav ul,
.site-header__mobile-nav ul {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__desktop-nav ul {
  gap: var(--space-4);
}

.site-header__desktop-nav li,
.site-header__mobile-nav li,
.site-header__desktop-nav li + li,
.site-header__mobile-nav li + li {
  margin: 0;
  padding: 0;
}

.site-header__desktop-nav a,
.site-header__enquiry,
.site-header__mobile-enquiry {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__desktop-nav a {
  border-bottom: 2px solid transparent;
  color: var(--color-steel-dark);
}

.site-header__desktop-nav a:hover,
.site-header__desktop-nav a:focus-visible,
.site-header__desktop-nav a[aria-current="page"] {
  border-bottom-color: var(--color-red);
  color: var(--color-ink);
}

.site-header__enquiry,
.site-header__mobile-enquiry {
  justify-content: center;
  padding: 0.6875rem 0.875rem;
  border: var(--border-ink-strong);
  background: var(--color-ink);
  color: var(--color-paper-bright);
}

.site-header__enquiry:hover,
.site-header__enquiry:focus-visible,
.site-header__mobile-enquiry:hover,
.site-header__mobile-enquiry:focus-visible {
  border-color: var(--color-red);
  background: var(--color-red);
  color: var(--color-ink);
}

.site-header__toggle {
  display: none;
  flex: 0 0 2.75rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  min-width: 2.75rem;
  height: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  gap: 0.25rem;
  border: var(--border-ink-strong);
  background: var(--color-paper);
  color: var(--color-ink);
}

.site-header__toggle:hover,
.site-header__toggle:focus-visible {
  border-color: var(--color-red);
  background: var(--color-paper);
  color: var(--color-ink);
}

.site-header__toggle-line {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.375rem) 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(-0.375rem) rotate(-45deg);
}

.site-header__mobile-nav {
  position: absolute;
  z-index: 101;
  top: 100%;
  right: 0;
  left: 0;
  display: none;
  max-height: calc(100vh - 4.75rem);
  overflow-x: hidden;
  overflow-y: auto;
  border-bottom: var(--border-ink-strong);
  background: var(--color-paper-bright);
}

.site-header__mobile-nav.is-open {
  display: block;
}

.site-header__mobile-nav-inner {
  display: grid;
  width: min(100% - (var(--gutter) * 2), var(--container-max));
  margin-inline: auto;
  padding-block: var(--space-5) var(--space-6);
  gap: var(--space-5);
}

.site-header__mobile-brand {
  gap: var(--space-2);
  padding-bottom: var(--space-4);
  border-bottom: var(--border-rule);
}

.site-header__mobile-brand img {
  flex: 0 0 1.875rem;
  width: 1.875rem;
  height: 1.875rem;
  object-fit: contain;
}

.site-header__mobile-nav ul {
  display: grid;
  align-items: stretch;
  border-top: var(--border-rule);
}

.site-header__mobile-nav li {
  border-bottom: var(--border-rule);
}

.site-header__mobile-nav a:not(.site-header__mobile-enquiry) {
  display: flex;
  align-items: center;
  min-height: 3.25rem;
  padding-block: var(--space-3);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.1;
  text-decoration: none;
  text-transform: uppercase;
}

.site-header__mobile-nav a:not(.site-header__mobile-enquiry):hover,
.site-header__mobile-nav a:not(.site-header__mobile-enquiry):focus-visible,
.site-header__mobile-nav a[aria-current="page"] {
  color: var(--color-red-dark);
}

.site-header__mobile-enquiry {
  width: 100%;
  min-height: 3rem;
}

@media (max-width: 72rem) {
  .site-header__desktop-nav {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__left {
    gap: 0;
  }
}

@media (max-width: 42.5rem) {
  .site-header__inner {
    min-height: 4.25rem;
    gap: var(--space-2);
  }

  .site-header__brand img {
    flex-basis: 1.75rem;
    width: 1.75rem;
    height: 1.75rem;
  }

  .site-header__wordmark {
    font-size: 0.75rem;
    letter-spacing: 0.065em;
  }

  .site-header__enquiry {
    width: 2.75rem;
    min-width: 2.75rem;
    padding: 0;
    overflow: hidden;
    font-size: 0;
  }

  .site-header__enquiry::after {
    content: "+";
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1;
  }

  .site-header__mobile-nav {
    max-height: calc(100vh - 4.25rem);
  }
}

@media (max-width: 23rem) {
  .site-header__wordmark {
    display: none;
  }
}

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