body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

header {
    background-color: #007bff;
    color: white;
    padding: 20px;
    width: 100%;
    text-align: center;
}

main {
    text-align: center;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    margin: 20px;
    max-width: 600px;
}

button {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #218838;
}

footer {
    margin-top: auto;
    width: 100%;
    text-align: center;
    padding: 10px;
    background-color: #333;
    color: white;
}