Quete 7 responsive

---- HTML :

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Find the precious!</title>
        <link rel="stylesheet" href="style.css">
    </head>
    <body>
        <nav>
            <ul>
                <li>FindThePrecious.com</li>
                <li class="button">Fellows</li>
                <li>Contact us</li>
            </ul>
        </nav>
        <section>
            <div class="carousel"></div>
        </section>
        <section class="wanted">
            <h2>Fellows wanted dead <span>(or alive if you want to eat them later)</span></h2>
        </section>
        <section class="photo">
            <article></article>
            <article></article>
            <article></article>
        </section>

        <hr>

        <form>
            <h2>Contact us</h2>
            <input class="mail" type="email" placeholder="@">
            <input class="firstname" type="text" placeholder="&#8962;">
            <input class="choix" type="text" placeholder="I have seen one of them">
            <textarea placeholder="Your message"></textarea>
        </form>
        <footer>
            <a href="">About us</a>
            <a href="">Fellows</a>
            <a href="">Join our army</a>
            <a href="">FAQ</a>
            <a href="">Reward conditions</a>
            <a href="">Legal mentions</a>
            <a href="">Sauron4Ever.com</a>
            <a href="">Follow him</a>
        </footer>
    </body>
</html>


---- CSS :

nav li {
    color: lightgrey;
    display: inline-block;
    padding: 15px;
    border: 1px solid black;
}

nav {
    background-color: black;
}

nav ul {
    margin: 0px;
}

ul .button {
    background-color: lightgrey;
    color: #333;
}

.carousel {
    height: 250px;
    background-color: lightgrey;
}

.wanted {
    margin: 40px;
}

.wanted h2 {
    text-align: center;
    color: grey;
    font-size: 1.2em;
}

.wanted span {
    font-size: 70%;
}

.photo {
    text-align: center;
    margin-bottom: 40px;
}

.photo article {
    display: inline-block;
    background-color: lightgrey;
    width: 25%;
    height: 500px;
    margin: 5px;

}

form {
    width: 50%;
    margin: auto;
}


form input, form textarea {
    padding: 0px;

}

.mail, .firstname {
    border: 1px solid black;
    padding-bottom: 5px;
    margin-bottom: 10px;
    width:100%;
}

.choix {
    width:100%;
    box-sizing: border-box;
}

textarea {
    height: 10em;
    width:100%;
    margin-top:10px;
    padding-top:5px;
    border: 1px solid black;
}


footer {
    display: none;
}

@media (max-width:961px) {


    .photo, .carousel {
        display: none;
    }

    .wanted h2 {
        font-size: 1.5em;
        padding: 30px;
    }

    form h2 {
        text-align: center;
    }

}