.pelota{
  width: 20%;
  text-align:center;
  float:left;
  margin: 10px;
  padding: 10px;
  font-family:"Franklin Gothic Medium","Arial Narrow",Arial,sans-serif;
}
img{
  width: 100%;
}
#contenido{
  width: 80%;
  background-color: rgb(2015,2015,92);
}