.site-header {
  position: relative;
  z-index: 800;
  border-bottom: 1px solid var(--color-edge);
  background: var(--color-asphalt);
}

.site-header::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-magenta) 0 72px, transparent 72px);
  content: "";
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  min-height: 72px;
}

.site-header__brand {
  display: inline-flex;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  color: var(--color-paper);
  text-decoration: none;
}

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

.site-header__logo {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  object-fit: contain;
}

.site-header__brand-text {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__nav {
  min-width: 0;
  margin-left: auto;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(.5rem, 1.3vw, 1rem);
  margin: 0;
  padding: 0;
}

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

.site-header__nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 2px solid transparent;
  color: var(--color-steel);
  font-size: .75rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

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

.site-header__download {
  display: inline-flex !important;
  flex-direction: column;
  align-items: flex-start !important;
  justify-content: center;
  min-height: 44px !important;
  padding: 6px 10px;
  border: 1px solid var(--color-yellow) !important;
  border-bottom-color: var(--color-yellow) !important;
  background: var(--color-yellow);
  color: var(--color-asphalt) !important;
  font-size: .75rem !important;
  font-weight: 800 !important;
  line-height: 1.05 !important;
}

.site-header__download span {
  font-family: var(--font-mono);
  font-size: .55rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.site-header__download:hover {
  border-color: var(--color-paper) !important;
  background: var(--color-paper);
  color: var(--color-asphalt) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--color-edge);
  border-radius: var(--radius-control);
  background: var(--color-carbon);
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-paper);
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-magenta);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-magenta);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line {
  background: var(--color-magenta);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1080px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .site-header__brand-text {
    font-size: 1.5rem;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    z-index: 1;
    display: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    border-bottom: 1px solid var(--color-edge);
    background: var(--color-carbon);
    box-shadow: var(--shadow-elevation);
  }

  .site-header__nav.is-open,
  .nav-toggle[aria-expanded="true"] + .site-header__nav {
    display: block;
  }

  .site-header__nav-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
    width: var(--container-width);
    margin-inline: auto;
    padding-block: var(--space-3);
  }

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

  .site-header__nav-list a {
    width: 100%;
    min-height: 48px;
    padding-inline: var(--space-3);
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

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

  .site-header__download {
    align-items: flex-start !important;
    margin: var(--space-2) 0;
  }
}

@media (max-width: 560px) {
  .site-header__inner {
    gap: var(--space-3);
  }

  .site-header__brand-text {
    font-size: 1.35rem;
  }

  .site-header__nav-list {
    grid-template-columns: 1fr;
    width: var(--container-width-mobile);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle__line {
    transition: none;
  }
}

ul { list-style: none !important; }
.nav-toggle { flex-direction: column; }