body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f8f8f8;
    color: #333;
    text-align: center;
}

header {
    background: linear-gradient(135deg, #ff9800, #ff5722);
    color: white;
    padding: 40px 20px;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 15px 30px;
    background: #2ecc71;
    color: white;
    text-decoration: none;
    font-size: 18px;
    border-radius: 5px;
}

.features, .screenshots, .contact {
    padding: 30px 20px;
    background: white;
    margin: 15px;
    border-radius: 8px;
}

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

ul li {
    font-size: 18px;
    margin: 10px 0;
}

footer {
    background: #222;
    color: #aaa;
    padding: 15px;
    font-size: 14px;
}