body{background-image: url(img/borrador.jpg); background-repeat: no-repeat; background-position-x: center; background-position-y: top; width: 75%; margin: auto;}
h1,h2{color: #ffcc00; padding: 10px; background-repeat: repeat-x;}
h1{text-align: center; background-image: url(img/madera.jpg);}
.ico1{content: url(img/valid-html401.png);}
.ico2{content: url(img/vcss.gif);}
.ico3{content: url(img/valid-xhtml11.png);}
.box{
    width: 75%;
    background-color: #ccccff;
    margin: auto;
    padding: 15px;
    border: 5px dotted#8f8f8f;}