body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 15px 0;
    text-align: center;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

main {
    padding: 20px;
    text-align: center;
}

#numberInput {
    padding: 10px;
    width: 200px;
    margin: 10px 0;
}

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

#tableOutput {
    margin-top: 20px;
    text-align: left;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid black;
}

th, td {
    padding: 10px;
    text-align: center;
}