.answers_table td {
    padding-left:10px;
    padding-right:10px;
}

.matrix th {
    background-color: rgb(209, 208, 208);
    padding-top: 5px;
    padding-bottom: 5px;
    border-bottom: 1px solid rgb(128, 128, 128);
}

.matrix td, .matrix th {
    padding-left:10px;
    padding-right:10px;
    text-align: center;
}

.matrix th:first-child {
    background-color: initial;
}

.matrix th:first-child , .matrix tr td:first-child {
    border-right: 1px solid rgb(128, 128, 128);
}

/* Zebra stripping  */
/* .answers_table tr:nth-child(4n-1), table tr:nth-child(4n) {
    background: #eee;
  } */