body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: 
    linear-gradient(rgba(255,255,255,0.75), rgba(255,255,255,0.75)),
    url("bg.jpg");
  background-size: cover;
  background-position: center;
}

.container {
  max-width: 700px;
  margin: 100px auto;
  background: rgba(255,255,255,0.9);
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

button, a.botao {
  padding: 12px 20px;
  margin: 10px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: white;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
}

a.botao.secundario {
  background: #e5e7eb;
  color: #111;
}