#contenidos h2 {
  margin: 0;
  text-align: center;
  font-size: 1.2em;
  text-shadow: 7px 9px 9px #fff;
  color: #33a9eb;
  font-style: oblique;
} 
  .clean {
      clear: both;
      height: 1px
  }
    
  #contenidos  {
  padding: 1em;
  background-image: url('../img/fondo-playa.jpg');
  background-size: 100% 100%;
}