body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Segoe UI', sans-serif;
}

.contenedor {
  background: url('fondo.jpg') no-repeat center center;
  background-size: cover;
  height: 120%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.contenido {
  background-color: rgba(255, 255, 255, 0.85);
  padding: 40px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
}

p {
  font-size: 1.2em;
  margin: 10px 0;
}

footer {
  margin-top: 20px;
  font-size: 0.9em;
  color: #555;
}