.site-header {
  position: sticky;
  z-index: 1000;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--color-line-blue-grey);
  background: var(--color-midnight-blue);
  color: var(--color-white-smoke);
}

.site-header__inner {
  display: flex;
  width: min(100%, var(--container-max));
  min-height: 5.25rem;
  align-items: center;
  gap: var(--space-5);
  margin-inline: auto;
  padding: var(--space-3) var(--container-padding);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-white-smoke);
  text-decoration: none;
}

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

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

.site-header__brand-name {
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.site-header__nav {
  min-width: 0;
  flex: 1 1 auto;
}

.site-header__nav-inner {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-header__list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: clamp(0.75rem, 1.5vw, 1.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__list a {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  color: var(--color-white-smoke);
  font-size: var(--font-size-small);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

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

.site-header__cta {
  width: auto;
  flex: 0 0 auto;
  min-height: 3rem;
  padding-inline: var(--space-4);
  white-space: nowrap;
}

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

@media (max-width: 70rem) {
  .site-header__inner {
    min-height: 4.5rem;
    justify-content: space-between;
    padding-block: var(--space-2);
  }

  .site-header__mark {
    width: 2.25rem;
    height: 2.25rem;
    flex-basis: 2.25rem;
  }

  .site-header__toggle {
    display: inline-flex;
    width: 3rem;
    min-height: 3rem;
    flex: 0 0 3rem;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3125rem;
    border-color: var(--color-line-blue-grey);
    background: transparent;
    color: var(--color-white-smoke);
  }

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

  .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: fixed;
    z-index: 999;
    top: 4.5rem;
    right: 0;
    bottom: 0;
    left: 0;
    visibility: hidden;
    overflow-y: auto;
    padding: var(--space-7) var(--container-padding) var(--space-8);
    background: var(--color-midnight-blue);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
  }

  .site-header__nav-inner {
    display: flex;
    width: min(100%, 36rem);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-6);
    margin-inline: auto;
  }

  .site-header__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid var(--color-line-blue-grey);
  }

  .site-header__list li {
    border-bottom: 1px solid var(--color-line-blue-grey);
  }

  .site-header__list a {
    min-height: 3.75rem;
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 6vw, 2.5rem);
    font-weight: 500;
    letter-spacing: var(--tracking-heading);
  }

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

  .site-header__cta {
    width: 100%;
  }

  .site-header:has(.site-header__nav.is-open) {
    border-bottom-color: var(--color-electric-blue);
  }
}

@media (max-width: 30rem) {
  .site-header__inner {
    gap: var(--space-3);
  }

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

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