.site-header {
  position: relative;
  z-index: 100;
  width: 100%;
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-black);
  color: var(--color-white);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  min-height: 5.25rem;
  align-items: center;
  gap: var(--space-5);
}

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

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

.site-header__logo {
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 2.75rem;
  object-fit: contain;
}

.site-header__brand-text {
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 1;
  white-space: nowrap;
}

.site-header__navigation {
  min-width: 0;
}

.site-header__links {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: clamp(0.625rem, 1.25vw, 1.25rem);
  margin: 0;
  padding: 0;
  list-style: none !important;
}

.site-header__links li,
.site-header__links li + li {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
}

.site-header__links a {
  position: relative;
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding-block: 0.25rem;
  color: var(--color-white);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__links a::after {
  position: absolute;
  right: 0;
  bottom: 0.15rem;
  left: 0;
  height: 2px;
  background: var(--color-acid);
  content: "";
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

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

.site-header__links a:hover::after,
.site-header__links a[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-header__action,
.site-header__mobile-action {
  display: inline-flex;
  min-height: 2.875rem;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-acid);
  padding: 0.625rem 0.75rem;
  background: var(--color-acid);
  color: var(--color-black);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.1;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__action:hover,
.site-header__mobile-action:hover {
  border-color: var(--color-white);
  background: var(--color-black);
  color: var(--color-acid);
  box-shadow: var(--shadow-hard-acid);
}

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

@media (max-width: 67.9375rem) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 4.75rem;
    gap: var(--space-3);
  }

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

  .site-header__brand-text {
    font-size: 1rem;
  }

  .site-header__action {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
    width: 3rem;
    height: 3rem;
    flex: 0 0 3rem;
    gap: 0.3125rem;
    border: 1px solid var(--color-white);
    padding: 0;
    background: var(--color-black);
    color: var(--color-white);
  }

  .site-header__toggle:hover {
    border-color: var(--color-acid);
    background: var(--color-surface);
    box-shadow: none;
  }

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

  .site-header__toggle[aria-expanded="true"] {
    border-color: var(--color-acid);
    color: var(--color-acid);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
    transform: translateY(0.4375rem) 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(-0.4375rem) rotate(-45deg);
  }

  .site-header__navigation {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: grid;
    max-height: calc(100vh - 4.75rem);
    min-height: 0;
    gap: var(--space-5);
    overflow-y: auto;
    border-bottom: 2px solid var(--color-acid);
    background: var(--color-black);
    opacity: 0;
    padding: var(--space-5) max(var(--container-mobile-padding), calc((100vw - var(--container-max)) / 2 + var(--container-padding)));
    pointer-events: none;
    transform: translateY(-0.5rem);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    visibility: hidden;
  }

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

  .site-header__links {
    display: grid;
    justify-content: stretch;
    gap: 0;
    border-top: 1px solid var(--color-rule);
  }

  .site-header__links li,
  .site-header__links li + li {
    display: block;
    margin: 0;
    border-bottom: 1px solid var(--color-rule);
  }

  .site-header__links a {
    width: 100%;
    min-height: 3.5rem;
    padding: var(--space-3) var(--space-4);
    font-size: 0.75rem;
  }

  .site-header__links a::after {
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: 3px;
    height: auto;
    transform: scaleY(0);
  }

  .site-header__links a:hover::after,
  .site-header__links a[aria-current="page"]::after {
    transform: scaleY(1);
  }

  .site-header__mobile-only {
    display: block;
  }

  .site-header__mobile-action {
    display: inline-flex;
    width: 100%;
    min-height: 3.25rem;
  }

  .has-open-navigation {
    overflow: hidden;
  }
}

@media (max-width: 31.25rem) {
  .site-header__brand {
    gap: var(--space-2);
  }

  .site-header__brand-text {
    font-size: 0.9375rem;
  }

  .site-header__navigation {
    padding-inline: var(--container-mobile-padding);
  }
}

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