html {
  font-size: 1em;
  line-height: 1.5em;
  font-family: "Verdana", Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #f3f3f3;
}

.encabezado {
  text-align: center;
  background: #006699;
  border-bottom: 0.1em solid silver;  
  padding: 0.5em;
  }


.footer-principal {
  text-align: center;
  background: #006699;
  border-bottom: 0.1em solid silver;  
  padding: 1em;
  }

.principal {
  max-width: 900px;
  margin: auto;
  padding: 1em;
}

.caja1, .caja2 {
  background: #fff;
  border: 0.1em solid gray;
  padding: 1em;
  margin: 1em;
  box-shadow: 0 0 0.1em 0.01em black;
} 


.caja1 h2 {
  font-family: 'Verdana', sans-serif;
  color: darkblue;
  text-shadow: 0.03em 0.03em 0.01em #000;
  letter-spacing: 0.03em;
}

.caja2 h1 {
  font-family: 'Verdana', sans-serif;
  color: darkblue;
  text-shadow: 0.03em 0.03em 0.01em #000;
  letter-spacing: 0.03em;
}

.caja2 h3{
	
  color: darkblue;
  background-color: #f2f5f6;
  border-radius: 3px;
  padding: 5px;
  margin: 10px 5%;
  text-align: center;
}
	  
.caja2 p {
  text-align: justify;
  font-family: 'Verdana', sans-serif;
  font-size: 0.8em;
  color: darkblue;
  }