.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--clr-bg);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--t-slow),
    background var(--t-slow);
}

.site-nav.is-scrolled {
  border-bottom-color: var(--clr-border);
  background: rgba(255, 255, 255, 0.9);
}

@supports (backdrop-filter: blur(1px)) {
  .site-nav.is-scrolled {
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav {
    transition: none;
  }
}

/* ── Inner container ── */

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Logo ── */

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 36px;
  width: auto;
}

/* ── Links ── */

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--w-medium);
  color: var(--clr-text-2);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast);
}

.nav-links a:hover {
  color: var(--clr-text);
}

.nav-links a:focus-visible {
  outline: 2px solid var(--clr-brand);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ── CTA button ── */

.nav-links a.nav-cta {
  background: var(--clr-brand);
  color: var(--clr-text-inv);
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--r-full);
  font-weight: var(--w-semibold);
  transition: background var(--t-fast), color var(--t-fast);
}

.nav-links a.nav-cta:hover {
  background: var(--clr-brand-dark);
  color: var(--clr-text-inv);
}

/* ── Mobile ── */

@media (max-width: 640px) {
  .nav-inner {
    height: 56px;
    padding: 0 var(--sp-4);
  }

  .nav-links a:not(.nav-cta) {
    display: none;
  }
}