body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
}

h2 {
    margin-top: 20px;
}

table {
    width: 50%;
    border-collapse: collapse;
    margin: 20px auto;
}

th, td {
    border: 1px solid black;
    padding: 10px;
    text-align: center;
}

th {
    background-color: yellow;
}