.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--nav-h);
  transition: background-color var(--tr-base), box-shadow var(--tr-base);
}

.nav.is-scrolled {
  background-color: rgba(245, 244, 240, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.nav__logo-icon { height: 46px; width: auto; }

.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav__logo-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.12em;
}

.nav__logo-tagline {
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

.nav__burger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 19px;
}

.nav__burger span {
  display: block;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--tr-fast), opacity var(--tr-fast);
  pointer-events: none;
}

.nav__burger.is-active span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
.nav__burger.is-active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__burger.is-active span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }

.nav__menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  inset-inline: 0;
  bottom: 0;
  background-color: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  z-index: 190;
}

.nav__menu.is-open { display: flex; }

.nav__link {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-body);
  position: relative;
  transition: color var(--tr-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--tr-base);
}

.nav__link:hover,
.nav__link.is-active { color: var(--color-primary); }

.nav__link:hover::after,
.nav__link.is-active::after { width: 100%; }

@media (min-width: 1024px) {
  .nav__burger { display: none; }

  .nav__menu {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
    background: none;
    inset: auto;
    bottom: auto;
    z-index: auto;
  }

  .nav__link { font-size: 0.9rem; padding: 0.375rem 0.75rem; }
  .nav__cta { margin-left: 0.75rem; }
}