.site-header {
  position: relative;
  z-index: 100;
  border-bottom: var(--border-subtle);
  background: var(--color-soft-white);
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 4.5rem;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-deep-eucalyptus);
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: var(--weight-bold);
  line-height: 1.1;
  text-decoration: none;
}

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

.site-header__logo {
  width: 2rem;
  height: 2rem;
  flex: 0 0 2rem;
  object-fit: contain;
}

.site-header__brand-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-grid;
  grid-template-columns: 1.25rem auto;
  grid-template-rows: repeat(3, 0.1875rem);
  width: auto;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0.625rem;
  border: 1px solid var(--color-deep-eucalyptus);
  background: transparent;
  color: var(--color-deep-eucalyptus);
  column-gap: 0.5rem;
  row-gap: 0.1875rem;
}

.site-header__toggle:hover,
.site-header__toggle[aria-expanded="true"] {
  background: var(--color-deep-eucalyptus);
  color: var(--color-soft-white);
  transform: none;
}

.site-header__toggle-line {
  display: block;
  width: 1.25rem;
  height: 2px;
  grid-column: 1;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle-label {
  grid-column: 2;
  grid-row: 1 / span 3;
  align-self: center;
  font-size: var(--text-meta);
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.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__nav {
  position: absolute;
  z-index: 101;
  top: calc(100% + 1px);
  right: 0;
  left: 0;
  display: none;
  max-height: min(75vh, 38rem);
  overflow-y: auto;
  border-bottom: var(--border-subtle);
  background: var(--color-soft-white);
  box-shadow: var(--shadow-elevated);
}

.site-header__nav[data-open="true"] { display: block; }

.site-header__nav-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
  padding-block: var(--space-5);
}

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

.site-header__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

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

.site-header__nav-list a {
  display: block;
  min-height: 2.75rem;
  padding: 0.625rem 0;
  color: var(--color-charcoal);
  font-size: var(--text-utility);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.04em;
  line-height: 1.5;
  text-decoration: none;
}

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

.site-header__nav-list a[aria-current="page"] {
  border-inline-start: 2px solid var(--color-muted-coral);
  padding-inline-start: var(--space-3);
}

.site-header__mobile-cta { align-self: flex-start; }
.site-header__actions { display: none; }

@media (min-width: 68rem) {
  .site-header__inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    min-height: 4.875rem;
    gap: var(--space-5);
  }

  .site-header__brand { font-size: 1.25rem; }
  .site-header__logo { width: 2.375rem; height: 2.375rem; flex-basis: 2.375rem; }
  .site-header__toggle { display: none; }

  .site-header__nav {
    position: static;
    display: block;
    max-height: none;
    overflow: visible;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .site-header__nav-inner {
    display: block;
    width: auto;
    margin: 0;
    padding: 0;
  }

  .site-header__nav-list {
    flex-direction: row;
    justify-content: center;
    gap: clamp(0.625rem, 1.25vw, 1.25rem);
  }

  .site-header__nav-list li { display: flex; align-items: center; }

  .site-header__nav-list a {
    display: inline-flex;
    align-items: center;
    min-height: 4.875rem;
    padding: 0;
    border-bottom: 2px solid transparent;
    font-size: 0.75rem;
    letter-spacing: 0.055em;
    white-space: nowrap;
  }

  .site-header__nav-list a[aria-current="page"] {
    border-inline-start: 0;
    border-bottom-color: var(--color-muted-coral);
    padding-inline-start: 0;
  }

  .site-header__nav-list li:nth-child(n + 7) { display: none; }
  .site-header__mobile-cta { display: none; }

  .site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    white-space: nowrap;
  }

  .site-header__action-link {
    color: var(--color-ocean-blue);
    font-size: var(--text-utility);
    font-weight: var(--weight-semibold);
    text-decoration: none;
  }

  .site-header__cta { min-height: 2.625rem; padding: 0.625rem 0.875rem; }
}

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