.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 16px 0;
  backdrop-filter: blur(18px);
  background: rgba(12, 12, 12, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nav-shell {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.32);
}

.brand-copy {
  display: grid;
  min-width: 0;
}

.brand-copy strong {
  font-family: 'Lexend', system-ui, sans-serif;
  font-size: 1.08rem;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.82rem;
}

.menu-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 52px;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  cursor: pointer;
}
.menu-icon {
  display: grid;
  gap: 5px;
}

.menu-icon span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-button.is-active .menu-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-button.is-active .menu-icon span:nth-child(2) {
  opacity: 0;
}

.menu-button.is-active .menu-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
  grid-column: 1 / -1;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(17, 17, 17, 0.96);
}

.site-nav.is-open {
  display: grid;
}

.nav-links,
.footer-links {
  display: grid;
  gap: 10px;
}

.nav-link,
.footer-link {
  color: var(--muted-strong);
}

.nav-link {
  padding: 10px 0;
}

.nav-link:hover,
.footer-link:hover {
  color: var(--accent);
}

.nav-cta {
  width: 100%;
}

.site-footer {
  padding: 24px 0 48px;
  border-top: 1px solid var(--line);
}

.footer-shell {
  display: grid;
  gap: 28px;
}

.footer-brand {
  margin-bottom: 16px;
}

.footer-copy {
  max-width: 48ch;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.94rem;
}

@media (min-width: 920px) {
  .nav-shell {
    grid-template-columns: auto 1fr;
  }

  .menu-button {
    display: none;
  }

  .site-nav,
  .site-nav.is-open {
    display: flex;
    grid-column: auto;
    align-items: center;
    justify-content: flex-end;
    padding: 0;
    border: 0;
    background: transparent;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
  }

  .nav-cta {
    width: auto;
    margin-left: 18px;
  }

  .footer-shell,
  .footer-meta {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }
}