.site-header {
  position: relative;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-primary);
}

.site-header__inner {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-parchment-100);
  text-decoration: none;
}

.site-header__brand:hover { color: var(--color-parchment-100); }

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

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.0625rem;
}

.site-header__brand-name {
  color: var(--color-parchment-100);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1;
  white-space: nowrap;
}

.site-header__brand-tagline {
  color: var(--color-parchment-300);
  font-size: 0.6875rem;
  line-height: 1.15;
  white-space: nowrap;
}

.site-header__toggle { margin-inline-start: auto; }

.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: 0.125rem;
  margin: 0;
  padding: 0;
  list-style: none !important;
}

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

.site-header__nav-list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.5rem 0.625rem;
  border-bottom: 2px solid transparent;
  color: var(--color-parchment-300);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-ember-500);
  color: var(--color-parchment-100);
}

.site-header__download {
  min-height: 2.75rem;
  flex: 0 0 auto;
  padding-inline: 0.75rem;
  font-size: 0.875rem;
  white-space: nowrap;
}

.site-header__external { margin-inline-start: 0.25rem; }
.site-header__nav-mobile-only { display: none; }

@media (max-width: 73.99rem) {
  .site-header__inner { min-height: 4rem; }

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

  .site-header__brand-name { font-size: 1.0625rem; }
  .site-header__brand-tagline { display: none; }
  .site-header__toggle { display: flex; }

  .site-header__nav {
    position: absolute;
    z-index: 101;
    top: calc(100% + 0.5rem);
    right: max(1rem, calc((100vw - var(--container-max)) / 2 + var(--container-padding)));
    left: max(1rem, calc((100vw - var(--container-max)) / 2 + var(--container-padding)));
    display: none;
    max-height: calc(100vh - 5.5rem);
    overflow-y: auto;
    padding: var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--surface-primary);
    box-shadow: var(--shadow-floating);
  }

  .site-header__nav.is-open { display: flex; flex-direction: column; align-items: stretch; }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
  }

  .site-header__nav-list a {
    width: 100%;
    min-height: 2.75rem;
    justify-content: flex-start;
    padding-inline: var(--space-3);
    border-bottom: 0;
    border-inline-start: 2px solid transparent;
  }

  .site-header__nav-list a:hover,
  .site-header__nav-list a[aria-current="page"] {
    border-inline-start-color: var(--color-ember-500);
    background: var(--surface-raised);
  }

  .site-header__nav-mobile-only { display: list-item; }
  .site-header__download { width: 100%; min-height: 3rem; }

  .site-header__toggle[aria-expanded="true"] { border-color: var(--color-ember-500); color: var(--color-ember-300); }
  .site-header__toggle[aria-expanded="true"] span { opacity: 0; }
  .site-header__toggle[aria-expanded="true"]::before { transform: translateY(7px) rotate(45deg); }
  .site-header__toggle[aria-expanded="true"]::after { transform: translateY(-7px) rotate(-45deg); }
  .site-header__toggle::before,
  .site-header__toggle::after,
  .site-header__toggle span { transition: transform var(--transition-menu), opacity var(--transition-menu); }
}

@media (max-width: 29.99rem) {
  .site-header__inner { gap: var(--space-2); }
  .site-header__brand { gap: 0.5rem; }
}