.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-ink-900);
}

body:has(.site-header) {
  padding-top: var(--header-height);
}

.site-header__inner {
  position: relative;
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-paper-100);
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--color-paper-100);
}

.site-header__mark {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  object-fit: contain;
}

.site-header__name {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav {
  min-width: 0;
  flex: 1 1 auto;
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: stretch;
  justify-content: center;
  gap: clamp(0.5rem, 1.1vw, 1rem);
  margin: 0;
  padding: 0;
}

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

.site-header__nav-list li.site-header__mobile-only {
  display: none;
}

.site-header__nav-list a,
.site-header__contact {
  display: inline-flex;
  min-height: var(--header-height);
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--color-paper-300);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"],
.site-header__contact:hover {
  border-color: var(--color-amber-400);
  color: var(--color-paper-100);
}

.site-header__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-3);
}

.site-header__download {
  display: inline-flex;
  min-height: 2.25rem;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-amber-400);
  border-radius: var(--radius-md);
  background: var(--color-amber-400);
  color: var(--color-ink-950);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.site-header__download:hover {
  border-color: var(--color-amber-600);
  background: var(--color-amber-600);
  color: var(--color-paper-100);
}

.site-header__download:active {
  transform: translateY(1px);
}

.site-header__mobile-actions,
.site-header .nav-toggle {
  display: none;
}

@media (max-width: 72rem) {
  .site-header__inner {
    justify-content: space-between;
  }

  .site-header .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-header__actions {
    display: none;
  }

  .site-header__nav {
    position: fixed;
    z-index: 101;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: grid;
    max-height: calc(100dvh - var(--header-height));
    padding: var(--space-4) max(var(--container-padding), env(safe-area-inset-right)) calc(var(--space-5) + env(safe-area-inset-bottom)) max(var(--container-padding), env(safe-area-inset-left));
    overflow-y: auto;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-ink-900);
    box-shadow: var(--shadow-raised);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.5rem);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    visibility: hidden;
  }

  .site-header__nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    visibility: visible;
  }

  .site-header__nav-list {
    display: grid;
    justify-content: stretch;
    gap: 0;
    border-top: 1px solid var(--color-border);
  }

  .site-header__nav-list li,
  .site-header__nav-list li + li {
    display: block;
    margin: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .site-header__nav-list li.site-header__mobile-only {
    display: block;
  }

  .site-header__nav-list a {
    width: 100%;
    min-height: 3rem;
    padding-inline: var(--space-3);
    border-bottom: 0;
    border-left: 3px solid transparent;
    font-size: var(--text-sm);
  }

  .site-header__nav-list a:hover,
  .site-header__nav-list a[aria-current="page"] {
    border-left-color: var(--color-amber-400);
    background: rgb(214 168 79 / 6%);
  }

  .site-header__mobile-actions {
    display: block;
    margin-top: var(--space-4);
  }

  .site-header__mobile-actions .button {
    width: 100%;
    min-height: 2.75rem;
  }

  .site-header .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(0.375rem) rotate(45deg);
  }

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

  .site-header .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-0.375rem) rotate(-45deg);
  }

  .site-header .nav-toggle span {
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

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

@media (max-width: 47.99rem) {
  .site-header__inner {
    gap: var(--space-3);
  }

  .site-header__mark {
    width: 2rem;
    height: 2rem;
    flex-basis: 2rem;
  }

  .site-header__name {
    font-size: 1rem;
  }
}

@media (max-width: 23rem) {
  .site-header__name {
    display: none;
  }
}