body {
    font-family: 'Georgia', serif;
    background-color: #fff;
    margin: 0;
    padding: 0;
}

#container {
    max-width: 1000px;
    margin: 20px auto;
    border: 2px solid #ced4da;
    border-radius: 15px;
    background-color: #f5f5f5;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

header {
    background-color: #17a2b8;
    color: white;
    padding: 25px;
    text-align: center;
}

main {
    padding: 25px;
}

aside {
    background-color: #e9ecef;
    padding: 15px;
    margin-top: 20px;
}

aside h2 {
    margin-top: 0;
}

footer {
    background-color: #343a40;
    color: white;
    text-align: center;
    padding: 15px;
}