.site-header {
  justify-content: center;
  position: sticky;
}

.site-header > .brand:not(.footer-brand) {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
}

.menu-toggle {
  display: block;
  position: absolute;
  right: clamp(18px, 4vw, 64px);
  z-index: 70;
}

.site-header nav {
  position: fixed;
  top: 0;
  right: 0;
  left: auto;
  width: min(360px, calc(100vw - 32px));
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  background: #fff;
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 96px 22px 22px;
  transform: translateX(110%);
  opacity: 0;
  pointer-events: none;
  transition: transform .32s ease, opacity .32s ease;
}

.site-header nav.open {
  display: flex;
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.site-header nav::before {
  content: "Menu";
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--red);
  margin: 0 0 10px 10px;
}

.site-header nav a {
  font-size: 1rem;
  padding: 14px 12px;
  border-radius: 6px;
}

.site-header nav a:hover,
.site-header nav a.active {
  background: #fff1f2;
  color: var(--red);
}

@media (max-width: 760px) {
  .site-header > .brand:not(.footer-brand) {
    gap: 8px;
  }

  .site-header > .brand:not(.footer-brand) span {
    font-size: 1.05rem;
  }

  .menu-toggle {
    right: 16px;
  }

  .site-header nav {
    width: min(330px, calc(100vw - 24px));
    padding-top: 86px;
  }
}