h1 {
    text-align: center;
}

table {
    border-collapse: collapse;
    border: 1px solid #000;
    margin: 20px auto;
}

th {
    border-collapse: collapse;
    border: 1px solid #000;
    background-color: #D9E9D9;
    font-weight: bold;
    padding: 5px 10px;
}

tr:nth-of-type(odd) {
    background-color: #D9E9D9;
}

td {
    padding: 5px 10px;
    border-collapse: collapse;
    border: 1px solid #000;
}