body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #d9e2ec;
    color: #333;
    margin: 0;
    padding: 0;
}

h1 {
    text-align: center;
    margin-top: 50px;
    color: #1e3a8a;
    font-size: 2.5em;
}

h3 {
    text-align: center;
    margin-top: 20px;
    color: #3b82f6;
    font-weight: normal;
}

p {
    text-align: center;
    font-size: 1.1em;
    color: #555;
}

#output {
    max-width: 800px;
    margin: 30px auto;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 15px;
    font-family: 'Courier New', Courier, monospace;
    color: #111;
    min-height: 150px;
}