.nav-tabs>li.absolute { 
    position: absolute; 
}

@media screen and (max-width: 1251px) { 
        .nav-tabs>li.active>a, 
        .nav-tabs>li.active>a:hover, 
        .nav-tabs>li.active>a:focus { 
            border-bottom-color: #ddd; 
            border-radius: 4px;
        } 
    }
@media screen and (max-width: 767px) { 
    .nav-tabs>li.xs-relative { position: relative;} 
}
@media screen and (max-width: 481px) { 
    .nav-tabs>li { width: 100%; text-align: center;} 
}