@media (min-width: 768px) {
    .container {
        max-width: 750px;
    }
}
@media (min-width: 992px) {
    .container {
        max-width: 970px;
    }
}
@media (min-width: 1200px) {
    .container {
        max-width: 1170px;
    }
}

[class*="col-"], div[style],footer,header,nav,section {
    border-radius: 6px;
    line-height: 30px;
    text-align: center;
}


.container {
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}
aside,article{
    border: 2px solid black;
    border-radius: 6px;
}