html { font-family: sans-serif; text-align: justify;
background-color: #FFEBC2;}

math { color: red; font-family: sans-serif;}

h1 { text-align: center; text-transform: uppercase; }

h2 { text-decoration: underline; }

p { margin: 0px 20px 10px;}
p.centrado { text-align: center; }
p.referencia { font-style: oblique;}
