.chapters{
	margin-right: 20px;
	margin-left: 20px;
}
.columnas {
    -webkit-column-count: 2; /* Chrome, Safari, Opera */
    -moz-column-count: 2; /* Firefox */
    column-count: 2;
}

.btn{
	color: white !important;
}

.tittle{
	color: white;
}