* {
    background-color: aliceblue;
}

.center {
    text-align: center;
}

table {
    margin-left: auto;
    margin-right: auto;
}

th {
    font-size: 18px;
}


table, tr, th, td{
    padding: 10px;
    align-items: center;
    border: 3px solid black;
    border-collapse: collapse;
}

tr:nth-child(2n) td {
    background-color: white;
}