ol.alternativas {

list-style-type: lower-alpha;

}



.espacio_rellenar {
font-weight: bold;

}


table {
text-align: center;
border: 0px;
}


#feliz { display: none;}
#triste { display: none; }

.ejercicio { display: none; }
.explicacion { display: none; }


div#ej1 { display: block;}

h1 {
background-color: #AAAAAA;
font-family: fantasy;
}

h2 {
background-color: #CCCCCC;
}

h3 {
background-color: #EEEEEE;
}

a {
font-weight: bold;
}

body {
background-image:url('image1.jpg');
font-family: sans-serif
}

#marcador {
background-color: red;
color: yellow;
font-weight: bold;
font-size: x-large;
}