table {
    width: 90%;
    border: solid #ccc thin;
    margin:auto;
    border-collapse: collapse;
}
tbody tr:nth-child(even) {
    background-color: #ccc;
}

thead {
    background-color: chartreuse;
}

td {
    border: solid #ccc thin;
}

tbody tr:hover {
    background-color:#aaa;
}