main{

    width:91%;
    margin:0.5rem auto;
    min-height: 10rem;
    display:block;
}
table{
    width:100%;
    border-top:1px solid #000;
    border-left:1px solid #000;
    border-right:1px solid #000;
    margin-bottom:5px;
}

tr{
    min-height: 0.42rem;
}
td{
    font-size: 0.28rem;
    line-height: 0.42rem;
    text-align: center;
    border-right:1px solid #000;
    border-bottom:1px solid #000;
}
td:last-child{
    border-right: none;
}