body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #007BFF;
    color: white;
    padding: 20px 0;
    text-align: center;
}

.intro {
    background-color: white;
    padding: 40px 20px;
    text-align: center;
}

.container {
    width: 100%;
    margin: 0 auto;
    text-align: justify;
}

.prototype {
    max-width: 400px;
    border: #333 2px solid;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(89, 14, 14, 0.638);;
    border-radius: 50px;
    height: auto;
    margin: 20px 0;
}

.content {
    text-align: justify;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 20px;
    background-color: #007BFF;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
}

.details {
    background-color: #f9f9f9;
    padding: 40px 20px;
    text-align: left;
}

.details h2 {
    text-align: center;
    color: #007BFF;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
}

ul {
    list-style-type: disc;
    margin-left: 20px;
}