/* ====== HEADER PRINCIPAL ====== */
.site-header {
  position: fixed; /* fixa no topo */
  top: 0;
  left: 0;
  width: 100%;
  background-color: #ffffff; 
  color: #000; /* texto agora preto */
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  z-index: 1000;
  box-sizing: border-box;
  transition: background 0.3s ease, padding 0.3s ease;
}

/* ====== LOGO ====== */
.site-header .logo img {
  height: 50px;
  transition: transform 0.3s ease;
}

.site-header .logo img:hover {
  transform: scale(1.05); /* efeito sutil ao passar o mouse */
}

/* ====== NAVEGAÇÃO PRINCIPAL ====== */
.site-header .main-nav {
  position: relative; /* necessário para o menu mobile */
}

.site-header .main-nav ul {
  list-style: none;
  display: flex; /* horizontal no desktop */
  gap: 25px;
  margin: 0;
  padding: 0;
}

.site-header .main-nav a {
  text-decoration: none;
  color: #66bb6a; /* verde IFSC claro */
  font-weight: bold;
  transition: all 0.3s ease;
  white-space: nowrap; /* evita quebra de linha */
}

.site-header .main-nav a:hover,
.site-header .main-nav a.active {
  color: #fbc02d; /* amarelo mel para destaque */
}

/* ====== BOTÃO HAMBÚRGUER (MOBILE) ====== */
.menu-toggle {
  display: none; /* só aparece em mobile */
  background: none;
  border: none;
  font-size: 28px;
  color: #66bb6a;
  cursor: pointer;
  transition: color 0.3s;
}

.menu-toggle:hover {
  color: #fbc02d;
}

/* ====== AJUSTE DE CONTEÚDO PARA NÃO SER COBERTO ====== */
body {
  padding-top: 70px; /* espaço equivalente à altura do header */
}

/* ====== RESPONSIVIDADE ====== */
@media (max-width: 768px) {
  .site-header {
    flex-direction: row;
    justify-content: space-between;
  }

  /* Exibe o botão menu */
  .menu-toggle {
    display: block;
  }

  /* Menu mobile em coluna */
  .site-header .main-nav ul {
    flex-direction: column;
    position: absolute;
    top: 70px; /* abaixo do header */
    right: 0;
    background-color: #1e1e1e;
    width: 200px;
    padding: 15px;
    border-radius: 8px;
    gap: 15px;
    display: none; /* oculto por padrão */
    box-shadow: 0 6px 18px rgba(0,0,0,0.5);
  }

  /* Menu aberto */
  .site-header .main-nav ul.open {
    display: flex;
  }
}