body{
    display: block;
    padding: 15px;
}
table{
    border-collapse: collapse;
}
td, th{
    padding: 4px;
    border: 2px;
    border-color:black;
    border-style:solid;
}
.stb{
    display:inline-block;   
    margin-top:10px;
    margin-bottom:20px;
    margin-left:5px;
}