/* Paleta de cores */
:root {
  --marrom: #6B4C3B;
  --amarelo-ouro: #D9B44A;
  --verde-escuro: #2E7D32;
  --cinza-claro: #F8F9FA;
  --cinza-texto: #444444;
}

/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--cinza-claro);
  color: var(--cinza-texto);
}

body {
  padding-top: 65px; /* espaço para navbar fixa */
  background-color: var(--cinza-claro);
}

/* Navbar */
.navbar {
  background-color: white !important;
  border-bottom: 2px solid var(--marrom);
}

.navbar-brand {
  font-weight: 700;
  color: var(--verde-escuro) !important;
  font-size: 1.6rem;
}

.navbar-nav .nav-link {
  font-weight: 600;
  color: var(--marrom);
  transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--verde-escuro);
  text-decoration: underline;
}

/* Header / Hero */
.intro {
  background: linear-gradient(
      rgba(107, 76, 59, 0.6),
      rgba(107, 76, 59, 0.6)
    ),
    url('protecaoanimal.jpg') center center / cover no-repeat;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  padding: 0 20px;
  border-radius: 0 0 60px 60px; /* borda arredondada para suavizar */
}

.intro h1 {
  font-size: 3rem;
  font-weight: 800;
  text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.6);
  margin-bottom: 1rem;
}

.intro p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 2rem auto;
  text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
}

/* Botão personalizado */
.btn-custom {
  background-color: var(--verde-escuro);
  color: white;
  padding: 14px 36px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 8px rgba(45, 125, 50, 0.4);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.btn-custom:hover,
.btn-custom:focus {
  background-color: var(--amarelo-ouro);
  color: var(--marrom);
  border-color: var(--marrom);
  box-shadow: 0 6px 12px rgba(107, 76, 59, 0.6);
}

/* Seções */
section {
  background-color: white;
  padding: 80px 20px;
  margin-bottom: 40px;
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(107, 76, 59, 0.15);
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

section h2 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 25px;
  color: var(--verde-escuro);
  text-align: center;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 4px solid var(--amarelo-ouro);
  display: inline-block;
  padding-bottom: 8px;
  margin-left: auto;
  margin-right: auto;
}

section p {
  font-size: 1.15rem;
  line-height: 1.8;
  max-width: 760px;
  margin: 0 auto;
  color: var(--marrom);
  text-align: center;
}

/* Cartões das ONGs */
.card {
  border-radius: 15px;
  border: none;
  box-shadow: 0 6px 16px rgba(107, 76, 59, 0.18);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 30px rgba(107, 76, 59, 0.35);
}

.card-img-top {
  border-top-left-radius: 15px;
  border-top-right-radius: 15px;
  object-fit: cover;
  height: 220px;
}

.card-body {
  padding: 20px 15px;
  color: var(--marrom);
}

.card-title {
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.card-body a {
  color: var(--amarelo-ouro);
  font-size: 1.5rem;
  transition: color 0.3s ease;
}

.card-body a:hover {
  color: var(--verde-escuro);
}

/* Seção Contato */
.section-contact p {
  font-size: 1.2rem;
  max-width: 500px;
  margin: 0 auto 15px auto;
  color: var(--marrom);
}

.social-icons {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 25px;
}

.social-icons a {
  font-size: 2.2rem;
  color: var(--verde-escuro);
  transition: color 0.3s ease, transform 0.3s ease;
}

.social-icons a:hover {
  color: var(--amarelo-ouro);
  transform: scale(1.3);
}

/* Rodapé */
footer {
  background-color: var(--marrom);
  color: var(--amarelo-ouro);
  padding: 18px 0;
  font-weight: 600;
  text-align: center;
  font-size: 1rem;
  letter-spacing: 0.05em;
  box-shadow: 0 -4px 8px rgba(107, 76, 59, 0.3);
}

/* Responsividade */
@media (max-width: 768px) {
  .intro h1 {
    font-size: 2rem;
  }

  .intro p {
    font-size: 1rem;
  }

  section h2 {
    font-size: 2rem;
  }

  .card-img-top {
    height: 180px;
  }
}