/* Navegação persistente e acessível */
.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  background: #fff;
  color: var(--wine-dark);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform .2s;
}

.skip-link:focus {
  transform: translateY(0);
}

.nav {
  position: fixed;
  z-index: 30;
  transition: background-color .25s, border-color .25s, box-shadow .25s;
}

.nav.is-scrolled,
.nav.menu-open {
  background: rgba(8, 38, 31, .97);
  border-color: rgba(255, 255, 255, .12);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .18);
  backdrop-filter: blur(12px);
}

section[id],
#conteudo-principal {
  scroll-margin-top: 94px;
}

[tabindex="-1"]:focus {
  outline: none;
}

.menu-toggle,
.mobile-nav {
  display: none;
}

.menu-toggle {
  width: 46px;
  height: 46px;
  padding: 11px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 4px 0;
  background: currentColor;
  transition: transform .2s, opacity .2s;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.menu-toggle:focus-visible,
.mobile-nav a:focus-visible,
a:focus-visible {
  outline: 3px solid #f2c886;
  outline-offset: 4px;
}

@media (width <= 1240px) {
  .desktop-nav {
    display: none;
  }

  .menu-toggle {
    flex: 0 0 46px;
    display: block;
  }

  .mobile-nav {
    position: fixed;
    z-index: 29;
    top: 82px;
    right: 0;
    width: min(390px, 100%);
    max-height: calc(100vh - 82px);
    padding: 18px clamp(20px, 5vw, 34px) 28px;
    overflow-y: auto;
    background: #08261f;
    border-top: 1px solid rgba(255, 255, 255, .12);
    box-shadow: -18px 22px 35px rgba(0, 0, 0, .24);
  }

  .mobile-nav.is-open {
    display: flex;
    flex-direction: column;
  }

  .mobile-nav a {
    padding: 14px 2px;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    color: #fff;
    font: 400 19px/1.25 Georgia, serif;
  }

  .mobile-nav .mobile-nav-order {
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    padding: 15px 18px;
    border: 0;
    background: var(--red);
    font: 800 12px/1.3 Arial, Helvetica, sans-serif;
    display: flex;
  }

  body.menu-open {
    overflow: hidden;
  }
}

@media (width <= 600px) {
  .nav {
    gap: 12px;
  }

  .nav-cta {
    display: none;
  }

  .menu-toggle {
    width: 44px;
    height: 44px;
    margin-left: auto;
  }

  .mobile-nav {
    top: 72px;
    max-height: calc(100vh - 72px);
  }

  section[id],
  #conteudo-principal {
    scroll-margin-top: 82px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .skip-link,
  .nav,
  .menu-toggle span {
    transition: none;
  }
}