.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  background: var(--surface-page);
  color: var(--text-primary);
}

.site-header__inner {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  text-decoration: none;
}

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

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

.site-header__brand-name {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.035em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__brand-place {
  margin-top: 0.2rem;
  color: var(--text-secondary);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1;
  text-transform: uppercase;
}

.site-header__nav {
  min-width: 0;
  margin-left: auto;
}

.site-header__nav-list,
.site-header__mobile-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.4vw, 1.5rem);
}

.site-header__nav-list li,
.site-header__nav-list li + li {
  margin: 0;
  padding: 0;
}

.site-header__nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: var(--text-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav a::after {
  width: 0;
  height: 1px;
  margin-top: 1.65rem;
  margin-left: -100%;
  background: var(--color-burnt-copper);
  content: "";
  transition: width var(--transition-fast);
}

.site-header__nav a:hover::after,
.site-header__nav a:focus-visible::after,
.site-header__nav a[aria-current="page"]::after {
  width: 100%;
}

.site-header__enquire {
  min-height: 2.75rem;
  flex: 0 0 auto;
  padding: 0.625rem 0.9rem;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.site-header__toggle,
.site-header__mobile-links {
  display: none;
}

.site-header__toggle {
  position: relative;
  width: 3rem;
  height: 3rem;
  flex: 0 0 3rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-control);
  color: var(--text-primary);
}

.site-header__toggle-line {
  position: absolute;
  width: 1.25rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle-line:nth-child(1) { transform: translateY(-0.38rem); }
.site-header__toggle-line:nth-child(3) { transform: translateY(0.38rem); }

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

.site-header__toggle:focus-visible {
  box-shadow: var(--focus-ring);
  outline: 0;
}

@media (max-width: 68.749rem) {
  .site-header__inner {
    min-height: 4.75rem;
    gap: var(--space-3);
  }

  .site-header__mark {
    width: 2.125rem;
    height: 2.125rem;
    flex-basis: 2.125rem;
  }

  .site-header__brand-name {
    font-size: 1.3rem;
  }

  .site-header__nav-contact {
    display: none;
  }
}

@media (max-width: 56.249rem) {
  .site-header__inner {
    justify-content: space-between;
  }

  .site-header__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__enquire {
    order: 3;
  }

  .site-header__nav {
    position: absolute;
    z-index: 950;
    top: calc(100% + 0.5rem);
    right: var(--gutter);
    left: var(--gutter);
    display: block;
    width: auto;
    max-height: min(75vh, 34rem);
    overflow: auto;
    padding: var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-overlay);
    background: var(--surface-page);
    box-shadow: var(--shadow-overlay);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.5rem);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .site-header__nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

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

  .site-header__nav-list a {
    display: flex;
    min-height: 3rem;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    font-size: var(--text-meta);
  }

  .site-header__nav a::after {
    margin-top: 0;
    margin-left: 0;
  }

  .site-header__mobile-links {
    display: grid;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
  }

  .site-header__mobile-links a {
    min-height: 2rem;
    color: var(--text-secondary);
    font-size: var(--text-caption);
    letter-spacing: 0.04em;
  }
}

@media (max-width: 31.249rem) {
  .site-header__inner {
    min-height: 4.5rem;
    gap: var(--space-2);
  }

  .site-header__brand {
    gap: 0.55rem;
  }

  .site-header__brand-place {
    display: none;
  }

  .site-header__brand-name {
    font-size: 1.2rem;
  }

  .site-header__enquire {
    min-height: 2.75rem;
    padding-inline: 0.65rem;
    font-size: 0.75rem;
  }
}

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