.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 0 rgba(32, 33, 36, 0.02);
}

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-charcoal);
  text-decoration: none;
}

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

.site-header__logo {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__brand-name {
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: var(--tracking-heading);
  line-height: 1;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  width: 3rem;
  min-width: 3rem;
  height: 3rem;
  min-height: 3rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0;
  border-color: var(--color-border);
  background: var(--color-white);
  color: var(--color-charcoal);
}

.site-header__toggle:hover {
  border-color: var(--color-champagne-deep);
  background: var(--color-ivory);
  color: var(--color-charcoal);
  transform: none;
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.4rem) 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(-0.4rem) rotate(-45deg);
}

.site-header__nav {
  position: fixed;
  z-index: 899;
  top: 4.75rem;
  right: 0;
  bottom: 0;
  left: 0;
  display: none;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-5) var(--container-padding) var(--space-7);
  border-top: 1px solid var(--color-border);
  background: var(--color-white);
}

.site-header__nav.is-open {
  display: block;
}

.site-header__nav-inner {
  display: flex;
  width: min(100%, 32rem);
  min-height: 100%;
  margin-inline: auto;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-header__menu {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0;
  list-style: none;
}

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

.site-header__menu a {
  display: flex;
  min-height: 3.25rem;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-charcoal);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
}

.site-header__menu a:hover,
.site-header__menu a[aria-current="page"] {
  color: var(--color-champagne-deep);
}

.site-header__cta {
  width: 100%;
}

@media (min-width: 68rem) {
  .site-header__inner {
    min-height: 5rem;
    gap: var(--space-5);
  }

  .site-header__logo {
    width: 2.625rem;
    height: 2.625rem;
    flex-basis: 2.625rem;
  }

  .site-header__brand-name {
    font-size: 1.5rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    position: static;
    display: block;
    overflow: visible;
    flex: 1 1 auto;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .site-header__nav-inner {
    width: 100%;
    min-height: 0;
    margin: 0;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-4);
  }

  .site-header__menu {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: clamp(0.65rem, 1.15vw, 1.15rem);
  }

  .site-header__menu a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    border: 0;
    font-size: 0.6875rem;
    letter-spacing: 0.035em;
    line-height: 1.2;
    white-space: nowrap;
  }

  .site-header__menu-mobile-only {
    display: none;
  }

  .site-header__cta {
    width: auto;
    min-height: 2.75rem;
    flex: 0 0 auto;
    padding: 0.7rem 0.95rem;
    font-size: 0.6875rem;
    white-space: nowrap;
  }
}

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