/* ============================================================
   CABEÇALHO E MENU DE NAVEGAÇÃO — KIDS Centro Educacional
   ============================================================ */

.cabecalho-site {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--camada-menu);
  padding: 18px 0;
  background-color: rgba(245, 241, 225, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--transicao-padrao),
    border-color var(--transicao-padrao),
    padding var(--transicao-padrao),
    box-shadow var(--transicao-padrao);
}

.cabecalho-site.rolagem {
  background-color: rgba(245, 241, 225, 0.98);
  border-bottom-color: var(--cor-borda);
  box-shadow: 0 2px 24px rgba(17, 24, 32, 0.06);
  padding: 14px 0;
}

.barra-navegacao {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--espaco-medio);
}


/* -------- LOGOTIPO -------- */

.logotipo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logotipo img {
  height: 44px;
  width: auto;
  display: block;
  transition: opacity var(--transicao-rapida);
}

.logotipo:hover img {
  opacity: 0.85;
}


/* -------- MENU PRINCIPAL -------- */

.menu-principal {
  display: flex;
  align-items: center;
  gap: 32px;
}

.menu-principal > li > a {
  font-size: var(--texto-pequeno);
  font-weight: 500;
  color: var(--cor-primaria);
  letter-spacing: 0.01em;
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}

/* Sublinhado animado */
.menu-principal > li > a:not(.botao)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--cor-verde);
  border-radius: 2px;
  transition: width var(--transicao-padrao);
}

.menu-principal > li > a:not(.botao):hover::after,
.menu-principal > li > a.ativo::after {
  width: 100%;
}

.menu-principal > li > a.ativo {
  color: var(--cor-verde);
  font-weight: 600;
}

/* Botão WhatsApp no header */
.menu-principal > li:last-child > a.botao-header-wa {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #25D366;
  color: var(--cor-branca);
  padding: 10px 20px;
  border-radius: var(--raio-pilula);
  font-size: var(--texto-pequeno);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: all var(--transicao-padrao);
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
}

.menu-principal > li:last-child > a.botao-header-wa:hover {
  background-color: #20be5a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.menu-principal > li:last-child > a.botao-header-wa::after {
  display: none;
}

.menu-principal > li:last-child > a.botao-header-wa svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}


/* -------- BOTÃO HAMBÚRGUER (MOBILE) -------- */

.botao-menu-mobile {
  display: none;
  width: 38px;
  height: 38px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  border-radius: var(--raio-medio);
  background-color: var(--cor-branca);
  border: 1.5px solid var(--cor-borda);
  cursor: pointer;
  transition: all var(--transicao-rapida);
  z-index: var(--camada-menu);
}

.botao-menu-mobile:hover {
  border-color: var(--cor-verde);
}

.botao-menu-mobile span {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--cor-primaria);
  border-radius: 2px;
  transition: transform var(--transicao-padrao), opacity var(--transicao-padrao), width var(--transicao-padrao);
}

.botao-menu-mobile.aberto span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.botao-menu-mobile.aberto span:nth-child(2) {
  opacity: 0;
  width: 0;
}

.botao-menu-mobile.aberto span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}


/* -------- MENU MOBILE -------- */

@media (max-width: 960px) {

  .botao-menu-mobile {
    display: flex;
  }

  .menu-principal {
    position: fixed;
    top: 0;
    right: 0;
    width: min(80vw, 360px);
    height: 100dvh;
    background-color: var(--cor-branca);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 90px var(--espaco-medio) var(--espaco-medio);
    transform: translateX(100%);
    transition: transform var(--transicao-padrao);
    box-shadow: var(--sombra-forte);
    overflow-y: auto;
  }

  .menu-principal.aberto {
    transform: translateX(0);
  }

  .menu-principal > li {
    width: 100%;
  }

  .menu-principal > li > a {
    display: block;
    font-size: var(--texto-medio);
    font-weight: 500;
    padding: 14px 0;
    border-bottom: 1px solid var(--cor-borda-suave);
    width: 100%;
  }

  .menu-principal > li > a::after {
    display: none;
  }

  .menu-principal > li:last-child {
    margin-top: var(--espaco-pequeno);
  }

  .menu-principal > li:last-child > a.botao-header-wa {
    width: 100%;
    justify-content: center;
    margin-top: 4px;
  }

  /* Sobreposição ao abrir menu mobile */
  .sobreposicao-menu {
    position: fixed;
    inset: 0;
    background-color: rgba(13, 27, 26, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transicao-padrao);
    z-index: calc(var(--camada-menu) - 1);
  }

  .sobreposicao-menu.visivel {
    opacity: 1;
    pointer-events: auto;
  }
}