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

.site-header__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  width: min(100%, var(--container-max));
  min-height: 76px;
  margin-inline: auto;
  border-inline: 1px solid var(--color-ink);
}

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

.site-header__desktop-nav--left {
  justify-content: flex-start;
  border-right: 1px solid var(--color-ink);
}

.site-header__desktop-nav--right {
  justify-content: flex-end;
  border-left: 1px solid var(--color-ink);
}

.site-header__nav-list,
.site-header__mobile-list {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list {
  align-items: stretch;
  gap: 0;
}

.site-header__nav-list li,
.site-header__mobile-list li,
.site-header__nav-list li + li,
.site-header__mobile-list li + li {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: inline-flex;
  min-height: 76px;
  align-items: center;
  padding: 0 12px;
  border-bottom: 3px solid transparent;
  color: var(--color-ink);
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  line-height: 1.1;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-signal-yellow);
  background: var(--color-signal-yellow);
}

.site-header__contact-link {
  background: var(--color-signal-yellow);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 20px;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: var(--weight-bold);
  line-height: 1;
  letter-spacing: -0.045em;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__logo {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  object-fit: contain;
}

.site-header__brand-text {
  min-width: 0;
}

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

@media (max-width: 1050px) {
  .site-header__inner {
    min-height: 68px;
  }

  .site-header__nav-list a {
    min-height: 68px;
    padding-inline: 8px;
    font-size: 0.6875rem;
  }

  .site-header__brand {
    gap: 8px;
    padding-inline: 14px;
    font-size: 1rem;
  }

  .site-header__logo {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }
}

@media (max-width: 899px) {
  .site-header {
    min-height: 64px;
  }

  .site-header__inner {
    display: flex;
    min-height: 64px;
    align-items: center;
    justify-content: center;
    border-inline: 0;
  }

  .site-header__desktop-nav {
    display: none;
  }

  .site-header__brand {
    height: 64px;
    padding-inline: 56px;
    font-size: 0.9375rem;
  }

  .site-header__logo {
    width: 34px;
    height: 34px;
    flex-basis: 34px;
  }

  .site-header__toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    border: 1px solid var(--color-ink);
    background: var(--color-surface);
  }

  .site-header__toggle:hover,
  .site-header__toggle[aria-expanded="true"] {
    background: var(--color-signal-yellow);
  }

  .site-header__toggle-line {
    display: block;
    width: 20px;
    height: 1px;
    background: var(--color-ink);
    transition: transform var(--transition-standard), opacity var(--transition-standard);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
    transform: translateY(6px) 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(-6px) rotate(-45deg);
  }

  .site-header__mobile-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    z-index: 1;
    display: block;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    border-bottom: 1px solid var(--color-ink);
    background: var(--color-surface);
    box-shadow: var(--shadow-overlay);
  }

  .site-header__mobile-nav[hidden] {
    display: none !important;
  }

  .site-header__mobile-nav-inner {
    padding: 16px;
  }

  .site-header__menu-label {
    margin: 0 0 12px;
    color: var(--color-muted-ink);
    font-size: var(--text-label);
    font-weight: var(--weight-medium);
    line-height: var(--line-label);
    letter-spacing: 0.1em;
  }

  .site-header__mobile-list {
    flex-direction: column;
    border-top: 1px solid var(--color-ink);
  }

  .site-header__mobile-list li {
    border-bottom: 1px solid var(--color-ink);
  }

  .site-header__mobile-list a {
    display: flex;
    width: 100%;
    min-height: 48px;
    align-items: center;
    padding: 12px;
    color: var(--color-ink);
    font-family: var(--font-heading);
    font-weight: var(--weight-semibold);
    text-decoration: none;
  }

  .site-header__mobile-list a:hover,
  .site-header__mobile-list a[aria-current="page"] {
    background: var(--color-signal-yellow);
  }

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

@media (max-width: 420px) {
  .site-header__brand {
    gap: 7px;
    padding-inline: 16px 62px;
    font-size: 0.875rem;
  }
}

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