table {
    border-collapse: collapse;
    width: 100%;
}
th {
    text-align: center;
}
td {
    vertical-align: middle;
}
td,
th {
    border: 1px solid #dddddd;
    text-align: left;
    padding: 8px;
}
tr:nth-child(even) {
    background-color: #dddddd;
}