body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f6f9;
    text-align: center;
}

header {
    background-color: #1f3c88;
    color: white;
    padding: 20px;
}

section {
    padding: 30px;
}

.about, .features, .demo {
    background-color: white;
    margin: 20px auto;
    width: 80%;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h2 {
    color: #1f3c88;
}

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

li {
    padding: 8px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #1f3c88;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #162d66;
}

footer {
    margin-top: 30px;
    padding: 15px;
    background-color: #1f3c88;
    color: white;
}