/* ==========================================================================
   3. HEADER / NAVEGAÇÃO
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  transition: background-color 220ms ease, backdrop-filter 220ms ease, border-color 220ms ease;
}

.site-header.is-solid {
  background: rgba(17, 17, 17, 0.6);
  border-bottom: 1px solid rgba(245, 243, 239, 0.08);
  backdrop-filter: blur(18px);
}

.nav-shell {
  position: relative;
  display: grid;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  color: var(--bone);
  mix-blend-mode: difference;
}

.brand-name {
  font-size: 0.95rem;
  font-weight: 800;
}

.brand-tag {
  margin-top: 0.15rem;
  font-size: 0.52rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  opacity: 0.7;
}

.site-nav {
  display: none;
  position: fixed;
  top: 5rem;
  left: 50%;
  z-index: 80;
  width: min(18rem, calc(100vw - 3rem));
  gap: 0.45rem;
  padding: 1.15rem;
  border: 1px solid rgba(245, 243, 239, 0.18);
  border-radius: 1.2rem;
  background: rgba(17, 17, 17, 0.82);
  box-shadow: 0 24px 70px rgba(17, 17, 17, 0.42);
  backdrop-filter: blur(22px);
  transform: translateX(-50%);
  letter-spacing: 0.32em;
  justify-self: center;
}

.menu-backdrop {
  display: none;
}

.site-nav a,
.footer-title,
.section-kicker,
.card-top span,
.hero-footer,
.status-pill,
.footer-bottom {
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.site-nav a {
  display: block;
  padding: 0.85rem 1rem;
  border-radius: 0.7rem;
  color: var(--bone);
  opacity: 0.78;
  transition: background-color 180ms ease, opacity 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(245, 243, 239, 0.1);
  opacity: 1;
}

.menu-toggle {
  justify-self: end;
  border: 1px solid rgba(245, 243, 239, 0.45);
  background: transparent;
  color: var(--bone);
  padding: 0.7rem 1rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.65rem;
}

.site-header.menu-open .site-nav {
  display: grid;
}

.site-header.menu-open .brand,
.site-header.menu-open .menu-toggle {
  position: relative;
  z-index: 90;
}

.site-header.menu-open + .menu-backdrop {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(17, 17, 17, 0.36);
  backdrop-filter: blur(2px);
}