.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--ash) 94%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.nav.is-stuck {
  background: var(--ash);
  border-bottom-color: var(--hairline);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4.5rem;
}

.nav__brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-right: auto;
  text-decoration: none;
  color: var(--basalt);
}

.nav__mark {
  font-family: var(--font-display);
  font-variation-settings: 'wdth' 115, 'wght' 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  padding: 0;
}

.nav__links a {
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--basalt);
}

@media (max-width: 900px) {
  .nav__inner {
    min-height: 3.75rem;
    gap: 1rem;
  }

  .nav__links {
    display: none;
  }

  .nav__inner .btn {
    padding: 0.7rem 0.95rem;
    letter-spacing: 0.05em;
  }
}