.site-header {
  --header-logo-size: 48px;
  --header-logo-size-mobile: 36px;
  --header-gap: var(--space-4);
  --header-padding-y: var(--space-3);
  --header-padding-x: var(--container-gutter-mobile);
  --header-bg: var(--color-paper);
  --header-border: var(--border-subtle);
  --header-z-index: 1000;

  position: relative;
  z-index: var(--header-z-index);
  width: 100%;
  background-color: var(--header-bg);
  border-bottom: var(--header-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--header-gap);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--header-padding-y) var(--header-padding-x);
  min-height: calc(var(--header-logo-size) + 2 * var(--header-padding-y));
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
  color: var(--color-ink);
}

.site-header__brand:hover {
  text-decoration: none;
}

.site-header__logo {
  width: var(--header-logo-size);
  height: var(--header-logo-size);
  object-fit: contain;
  display: block;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--color-ink);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

.site-header__toggle:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

.site-nav {
  display: flex;
  align-items: center;
  flex-shrink: 1;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item {
  margin: 0;
  padding: 0;
  flex-shrink: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--target-size-min);
  padding: var(--space-2) var(--space-1);
  font-size: var(--text-body-size);
  font-weight: 600;
  line-height: 1;
  color: var(--color-ink);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-nav__link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

.site-nav__item--cta {
  margin-inline-start: var(--space-2);
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--target-size-min);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-coral);
  color: var(--color-white);
  font-size: var(--text-button-size);
  font-weight: var(--text-button-weight);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-radius: var(--radius-small);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-nav__cta:hover {
  background-color: var(--color-ink);
  color: var(--color-white);
  text-decoration: none;
}

.site-nav__cta:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

@media (max-width: 991px) {
  .site-header__inner {
    --header-logo-size: var(--header-logo-size-mobile);
    padding-inline: var(--container-gutter-mobile);
  }

  .site-header__toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(85vw, 360px);
    max-width: 100%;
    background-color: var(--color-paper);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform var(--transition-fast);
    z-index: calc(var(--header-z-index) + 1);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-4);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    width: 100%;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__item--cta {
    margin-inline-start: 0;
    margin-top: var(--space-4);
  }

  .site-nav__link,
  .site-nav__cta {
    width: 100%;
    justify-content: flex-start;
    padding: var(--space-3) var(--space-2);
    font-size: 1.25rem;
  }

  .site-nav__cta {
    justify-content: center;
    background-color: var(--color-coral);
    color: var(--color-white);
  }
}

@media (min-width: 992px) {
  .site-header__inner {
    --header-padding-x: var(--container-gutter-desktop);
  }

  .site-nav__list {
    gap: var(--space-5);
  }
}