body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background-color: #212529;
    color: #fff;
    padding: 1em;
    text-align: center;
}

main {
    padding: 1em;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1em;
}

th, td {
    padding: 0.75em;
    text-align: center;
    border: 1px solid #ddd;
}

th {
    background-color: #007bff;
    color: white;
}