body {
    background-color: white;
    color: black;
}
.table-fixed {
    width: 100%;
    background-color: #f3f3f3;
}
.table-fixed tbody {
    height: 500px;
    overflow-y: auto;
    width: 100%;
}
.table-fixed thead, .table-fixed tbody, .table-fixed tr, .table-fixed td, .table-fixed th {
    display: block;
}
.table-fixed tbody td {
    float: left;
}
.table-fixed thead tr th {
    float: left;
    background-color: mediumseagreen;
    border-color: darkgreen;

}