.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-paper);
  border-bottom: 2px solid var(--color-acid);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 4.5rem;
  padding-block: var(--space-2);
}

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

.site-header__logo {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  display: block;
}

.site-header__wordmark {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-header__nav {
  display: none;
  flex: 1 1 auto;
  justify-content: center;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.site-header__nav-list a {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  line-height: var(--leading-overline);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-ink);
  padding-block: var(--space-2);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-list a:hover {
  color: var(--color-acid);
}

.site-header__nav-list a[aria-current="page"] {
  color: var(--color-acid);
  box-shadow: inset 0 -2px 0 0 var(--color-acid);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.site-header__search {
  display: none;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--color-steel);
  border-radius: var(--radius-none);
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-paper);
}

.site-header__search input {
  border: none;
  background: transparent;
  padding: 0;
  font-size: var(--text-caption);
  line-height: var(--leading-overline);
  color: var(--color-ink);
  width: 8rem;
}

.site-header__search input:focus {
  outline: none;
}

.site-header__search button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-ink);
  transition: color var(--transition-fast);
}

.site-header__search button:hover {
  color: var(--color-acid);
}

.site-header__menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius-none);
  background-color: transparent;
  color: var(--color-ink);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__menu-toggle:hover {
  border-color: var(--color-acid);
  color: var(--color-acid);
}

.site-header__menu-toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-sm);
}

.site-header__menu-toggle-icon {
  position: relative;
  display: block;
  width: 1.25rem;
  height: 1rem;
}

.site-header__menu-toggle-icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__menu-toggle-icon span:nth-child(1) {
  top: 0;
}

.site-header__menu-toggle-icon span:nth-child(2) {
  top: 50%;
  transform: translateY(-50%);
}

.site-header__menu-toggle-icon span:nth-child(3) {
  bottom: 0;
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-icon span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.site-header__menu-toggle[aria-expanded="true"] .site-header__menu-toggle-icon span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

@media (min-width: 64rem) {
  .site-header__inner {
    min-height: 5rem;
  }

  .site-header__logo {
    width: 2rem;
    height: 2rem;
  }

  .site-header__wordmark {
    font-size: 1.5rem;
  }

  .site-header__nav {
    display: flex;
  }

  .site-header__search {
    display: flex;
  }

  .site-header__menu-toggle {
    display: none;
  }
}

@media (max-width: 63.99rem) {
  .site-header__nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(85vw, 20rem);
    background-color: var(--color-paper);
    box-shadow: var(--shadow-float);
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--space-5) var(--space-4);
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .site-header__nav-list a {
    display: block;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    letter-spacing: 0;
    text-transform: none;
    border-bottom: 1px solid rgba(136, 145, 157, 0.2);
  }

  .site-header__nav-list a:hover {
    background-color: var(--color-paper-dim);
    color: var(--color-ink);
  }
}

@media (max-width: 47.99rem) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__logo {
    width: 1.75rem;
    height: 1.75rem;
  }

  .site-header__wordmark {
    font-size: 1.25rem;
  }
}