body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #f0f0f0;
    padding: 20px;
    text-align: center;
}

.features, .contact, .technologies {
    padding: 20px;
}

.features h2, .contact h2, .technologies h2 {
    margin-top: 0;
}

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

a {
    color: blue;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}