.table-big {
    /*height: 50em;*/
    overflow-x: auto;
}
table {
    display: flex;
    flex-flow: column;
    height: 100%;
    width: 100%;
}
table thead {
    /* head takes the height it requires,
    and it's not scaled when table is resized */
    flex: 0 0 auto;
    width: calc(100% - 0.9em);
}
table tbody {
    /* body takes all the remaining available space */
    flex: 1 1 auto;
    display: block;
    overflow-y: scroll;
}
table tbody tr {
    width: 100%;
}
table thead,
table tbody tr {
    display: table;
    table-layout: fixed;
}
table td {
    word-wrap: break-word;
    overflow-wrap: break-word;
}