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

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-plum);
  text-decoration: none;
}

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

.site-header__mark {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__brand-text {
  display: block;
  min-width: 0;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.02;
  white-space: nowrap;
}

.site-header__brand-full {
  display: none;
}

.site-header__brand-short {
  display: block;
}

.site-header__toggle {
  display: inline-grid;
  width: 2.75rem;
  min-width: 2.75rem;
  height: 2.75rem;
  min-height: 2.75rem;
  flex: 0 0 2.75rem;
  place-content: center;
  gap: 0.25rem;
  border-radius: var(--radius-md);
  padding: 0.5rem;
}

.site-header__toggle-line {
  display: block;
  width: 1.25rem;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--transition-base), 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: absolute;
  top: calc(100% + 1px);
  right: 0;
  left: 0;
  display: none;
  max-height: calc(100vh - 4.75rem);
  overflow-y: auto;
  border-bottom: var(--border-default);
  background: var(--color-surface);
  box-shadow: var(--shadow-floating);
  padding: var(--space-4) max(var(--container-padding), var(--space-4)) var(--space-6);
}

.site-header__nav--open {
  display: grid;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__nav-list a,
.site-header__mobile-extra a {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: var(--border-default);
  color: var(--color-plum);
  font-size: var(--text-nav);
  font-weight: 700;
  text-decoration: none;
}

.site-header__nav-list a:hover,
.site-header__mobile-extra a:hover {
  color: var(--color-plum-hover);
  text-decoration: underline;
}

.site-header__contact {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-plum);
  border-radius: var(--radius-md);
  background: var(--color-plum);
  color: var(--color-white);
  padding: 0.75rem 1rem;
  font-size: var(--text-nav);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.site-header__contact:hover {
  border-color: var(--color-plum-hover);
  background: var(--color-plum-hover);
  color: var(--color-white);
}

.site-header__mobile-extra {
  display: grid;
  margin: 0;
  padding: 0;
}

.site-header-menu-open {
  overflow: hidden;
}

@media (min-width: 68rem) {
  .site-header__inner {
    min-height: 5.25rem;
    gap: var(--space-6);
  }

  .site-header__brand {
    flex: 0 1 auto;
  }

  .site-header__mark {
    width: 2.625rem;
    height: 2.625rem;
    flex-basis: 2.625rem;
  }

  .site-header__brand-text {
    font-size: 1.25rem;
  }

  .site-header__brand-full {
    display: block;
  }

  .site-header__brand-short {
    display: none;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    position: static;
    display: flex;
    min-width: 0;
    max-height: none;
    flex: 1 1 auto;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-4);
    overflow: visible;
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }

  .site-header__nav-list {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: clamp(0.75rem, 1.5vw, 1.25rem);
  }

  .site-header__nav-list a {
    min-height: 2.75rem;
    align-items: center;
    border: 0;
    white-space: nowrap;
  }

  .site-header__contact {
    flex: 0 0 auto;
    white-space: nowrap;
  }

  .site-header__mobile-extra {
    display: none;
  }
}