.container{padding-right:15px;padding-left:15px;margin-right:auto;margin-left:auto}
 @media (min-width:768px){.container{width:750px}}
 @media (min-width:992px){.container{width:970px}}
 @media (min-width:1200px){.container{width:1170px}}
 
 .container-fluid{padding-right:15px;padding-left:15px;margin-right:auto;margin-left:auto}.row{margin-right:-15px;margin-left:-15px}