.ba {
     border-style: solid;
     border-width: 1px;
}
 .bt {
     border-top-style: solid;
     border-top-width: 1px;
}
 .lh-copy {
     line-height: 1.5;
}
 .mw5 {
     max-width: 16rem;
}
 .white {
     color: #fff;
}
 .bg-near-black {
     background-color: #111;
}
 .pa3 {
     padding: 1rem;
}
 .pv2 {
     padding-top: .5rem;
     padding-bottom: .5rem;
}
 .ph3 {
     padding-left: 1rem;
     padding-right: 1rem;
}
 .mv0 {
     margin-top: 0;
     margin-bottom: 0;
}
 .mv4 {
     margin-top: 2rem;
     margin-bottom: 2rem;
}
 .f4 {
     font-size: 1.25rem;
}
 .f6 {
     font-size: .875rem;
}
 .measure {
     max-width: 30em;
}
 .center {
     margin-right: auto;
     margin-left: auto;
}
 @media screen and (min-width: 30em) {
     .mw6-ns {
         max-width: 32rem;
    }
     .f5-ns {
         font-size: 1rem;
    }
}
 .display-block{
     margin-top: calc(50vh - 100px);
}
 .display-block article{
     max-width: 16rem !important;
}
 @media screen and (max-width:768px) {
     .display-block{
         margin-top: inherit;
    }
     .display-block article{
         max-width: 90% !important;
    }
}