/* ── Sticky glassmorphism nav ─────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 245, 247, 0.72);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  transition:
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(245, 245, 247, 0.88);
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

/* ── Nav row ──────────────────────────────────────── */
.nav-row {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

/* ── Brand / logo ─────────────────────────────────── */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
  transition: transform var(--transition), box-shadow var(--transition);
  object-fit: cover;
}

.brand:hover .brand-mark {
  transform: scale(1.04);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
}

.brand-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

/* ── Primary nav ──────────────────────────────────── */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
  transition: color var(--transition), background var(--transition);
}

.site-nav a:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.05);
}

/* Nav CTA button — filled pill */
.site-nav .nav-cta {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg-white) !important;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.site-nav .nav-cta:hover {
  background: #3A3A3C;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ── Hamburger ────────────────────────────────────── */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  padding: 0;
  border: 1.5px solid var(--line-medium);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  backdrop-filter: blur(10px);
}

.menu-toggle span {
  display: block;
  width: 1rem;
  height: 1.5px;
  margin: 0.22rem auto;
  background: currentColor;
  border-radius: 999px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ── Mobile ───────────────────────────────────────── */
@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: min(18rem, calc(100vw - 2rem));
    padding: 0.75rem;
    border: 1px solid var(--line-medium);
    border-radius: var(--radius-large);
    background: rgba(245, 245, 247, 0.96);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 8px 40px rgba(0,0,0,0.12);
    gap: 0.2rem;
  }

  .site-nav.is-open { display: flex; }

  .site-nav a { text-align: center; }

  .site-nav .nav-cta { margin-top: 0.2rem; text-align: center; }
}