body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    background-color: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #2c3e50;
    margin-bottom: 20px;
}

p {
    color: #555;
    line-height: 1.6;
}

ul {
    list-style: none;
    padding: 20px 0;
}

li {
    color: #27ae60;
    font-size: 18px;
    margin: 10px 0;
}

.demo-image {
    max-width: 200px;
    margin: 30px 0;
    border: 2px solid #3498db;
    border-radius: 4px;
}

.footer {
    margin-top: 30px;
    color: #7f8c8d;
    font-size: 14px;
}