#boton{
font-family:Arial, Helvetica, sans-serif;
size:7;
margin-top:0;
margin-left:20%;
}

#boton li {
 display: inline;
}
 #boton li a {
margin-top:0;
display:block;
background-color:#D8C2C1;
border:1px solid #fff;
float: left;
color: #fff;
text-decoration:none;
padding: 30px;
text-align:center;
}
#boton li a:hover{
background-color:#B20F07;
}