body {
    margin: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
    border-bottom: 4px solid #4CAF50;
}
header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: normal;
}
main {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
    text-align: center;
    flex: 1;
}
main p {
    font-size: 1.25rem;
    color: #555;
}
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}
footer p {
    margin: 0;
    font-size: 0.9rem;
}
footer a {
    color: #fff;
    text-decoration: none;
}
footer a:hover {
    text-decoration: underline;
}
.container {
    padding: 2rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background-color: #f9f9f9;
}