.nav {
  --nav-menu-half-width: 315px;
  --nav-side-gap: 100px;
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: block;
  align-items: center;
  width: 100%;
  height: 48px;
  padding: 0 max(22px, calc((100% - 1024px) / 2));
  background: rgba(0, 0, 0, .76);
  color: rgba(245, 245, 247, .76);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 400;
  line-height: 1;
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
}

.nav__brand {
  position: absolute;
  top: 50%;
  right: calc(50% + var(--nav-menu-half-width) + var(--nav-side-gap));
  display: flex;
  width: max-content;
  align-items: center;
  transform: translateY(-50%);
}

.nav__logo {
  display: block;
  width: 172px;
  height: 16px;
  object-fit: contain;
}

.nav__menu {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 28px;
  transform: translate(-50%, -50%);
}

.nav__item,
.nav__back {
  color: inherit;
  font: inherit;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease;
}

.nav__back {
  position: absolute;
  top: 50%;
  left: calc(50% + var(--nav-menu-half-width) + var(--nav-side-gap));
  transform: translateY(-50%);
}

.nav__item:hover,
.nav__item:focus-visible,
.nav__back:hover,
.nav__back:focus-visible { color: #fff; }

@media (max-width: 1000px) {
  .nav {
    --nav-menu-half-width: 223px;
    --nav-side-gap: 20px;
  }
  .nav__menu { gap: 12px; }
  .nav__item,
  .nav__back { font-size: 10px; }
  .nav__logo { width: 140px; }
}

@media (max-width: 760px) {
  .nav {
    display: grid;
    grid-template-columns: 1fr auto;
    padding: 0 18px;
  }

  .nav__brand,
  .nav__back {
    position: static;
    transform: none;
  }

  .nav__brand { justify-self: start; }
  .nav__back { justify-self: end; }
  .nav__logo { width: 118px; height: auto; }
  .nav__menu { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .nav__item,
  .nav__back { transition: none; }
}