.site-header {
  position: relative;
  z-index: 100;
  height: 88px;
  border-bottom: var(--border-strong);
  background: var(--color-paper);
  color: var(--color-ink);
}

.site-header__inner {
  position: relative;
  display: grid;
  height: 100%;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-4);
}

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

.site-header__brand:hover {
  text-decoration: underline;
  text-decoration-color: var(--color-signal-mint);
  text-decoration-thickness: 3px;
}

.site-header__logo {
  width: 58px;
  height: 58px;
  flex: 0 0 58px;
  object-fit: contain;
}

.site-header__brand-text {
  display: block;
  white-space: nowrap;
  font-family: var(--font-display);
  font-size: 0.94rem;
  letter-spacing: 0.035em;
  line-height: 0.98;
}

.site-header__brand-text small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.15;
}

.site-header__desktop-nav {
  min-width: 0;
}

.site-header__desktop-nav--left {
  justify-self: start;
}

.site-header__desktop-nav--right {
  justify-self: end;
}

.site-header__desktop-nav ul,
.site-header__mobile-nav ul {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none !important;
}

.site-header__desktop-nav ul {
  gap: clamp(0.65rem, 1.4vw, 1.35rem);
}

.site-header__desktop-nav li,
.site-header__desktop-nav li + li,
.site-header__mobile-nav li,
.site-header__mobile-nav li + li {
  display: block;
  margin: 0;
  padding: 0;
}

.site-header__desktop-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  border-bottom: 3px solid transparent;
  color: var(--color-ink);
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__desktop-nav a:hover {
  border-bottom-color: var(--color-signal-mint);
  text-decoration: none;
  transform: translateY(-2px);
}

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

@media (max-width: 899px) {
  .site-header {
    height: 68px;
  }

  .site-header__inner {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
  }

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

  .site-header__brand {
    justify-self: auto;
    margin-right: auto;
  }

  .site-header__logo {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .site-header__brand-text {
    font-size: 0.78rem;
  }

  .site-header__brand-text small {
    font-size: 0.55rem;
  }

  .site-header__toggle {
    position: relative;
    z-index: 102;
    display: inline-flex;
    flex: 0 0 44px;
    flex-direction: column;
    background: var(--color-paper);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  }

  .site-header__toggle:hover {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--color-ink);
  }

  .site-header__toggle.is-open > span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header__toggle.is-open > span:nth-child(2) {
    opacity: 0;
  }

  .site-header__toggle.is-open > span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-header__toggle > span {
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header__mobile-nav {
    position: absolute;
    z-index: 101;
    top: calc(100% + 3px);
    right: 0;
    left: 0;
    display: block;
    max-height: calc(100vh - 68px - env(safe-area-inset-bottom));
    overflow-x: hidden;
    overflow-y: auto;
    border: var(--border-strong);
    background: var(--color-paper);
    box-shadow: var(--shadow-feature);
  }

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

  .site-header__mobile-nav ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
  }

  .site-header__mobile-nav li {
    min-width: 0;
    border-bottom: var(--border-strong);
  }

  .site-header__mobile-nav li:nth-child(odd) {
    border-right: var(--border-strong);
  }

  .site-header__mobile-nav li:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .site-header__mobile-nav a {
    display: flex;
    min-height: 54px;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    color: var(--color-ink);
    font-family: var(--font-display);
    font-size: 0.93rem;
    line-height: 1.05;
    text-decoration: none;
  }

  .site-header__mobile-nav a:hover {
    background: var(--color-signal-mint);
    text-decoration: underline;
    text-decoration-thickness: 3px;
  }

  html.mobile-menu-open,
  html.mobile-menu-open body {
    overflow: hidden;
  }
}

@media (max-width: 430px) {
  .site-header__mobile-nav ul {
    grid-template-columns: 1fr;
  }

  .site-header__mobile-nav li,
  .site-header__mobile-nav li:nth-child(odd),
  .site-header__mobile-nav li:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: var(--border-strong);
  }

  .site-header__mobile-nav li:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 360px) {
  .site-header__brand-text {
    font-size: 0.7rem;
  }

  .site-header__brand-text small {
    font-size: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__desktop-nav a:hover,
  .site-header__toggle:hover {
    transform: none;
  }
}