/* ===== ESTILO GLOBAL ===== */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #333;
  line-height: 1.6;
}

/* ===== HEADER ===== */
header {
  background: #222;   /* fundo escuro */
  color: #fff;        /* texto branco */
  text-align: center;
  padding: 20px;
}

header h1 {
  margin: 0;
  font-size: 28px;
  font-weight: bold;
}

/* ===== CONTEÚDO ===== */
main {
  max-width: 900px;
  margin: 30px auto;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h2 {
  margin-top: 20px;
  color: #444;
}

p, li {
  margin-bottom: 10px;
}

ul {
  margin: 10px 0 20px 20px;
}

/* ===== BOTÃO VOLTAR ===== */
a.voltar {
  display: inline-block;
  margin-top: 20px;
  background: #008000;
  color: #fff;
  padding: 10px 15px;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s ease;
}

a.voltar:hover {
  background: #006400;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 15px;
  background: #222;
  color: #fff;
  margin-top: 40px;
}