#config_table {
 border-spacing: 0;
 padding: 0;
 border: 1px solid #bbb;
 text-align: left;
}

#config_table tr th {
  background-color: #c3c3c3;
  padding: 5px;
  border-bottom: 1px solid #bbb;
  text-align: left;
}

#config_table tr td {
 vertical-align: top;
 margin: 0;
 padding: 4px;
 border-spacing: 0;
 border-top: 1px solid #bbb;
 border-bottom: 1px solid #bbb;
 border-collapse: collapse;
}

#config_table tr td {
 background-color: #e9e9e9;
}

#config_table tr:nth-child(odd) > td {
 background-color: #f3f3f3;
}

#config_table tr:hover td {
 background: white;
 border-top: 1px solid black;
 border-bottom: 1px solid black;
}