CSS code

.preview {
    display: none;
    position: fixed;
    z-index: 999;
    width: 100%;
    height: 100%;
    text-align: center;
    top: 0;
    left: 0;
    background: rgba(0,0,0,0.8);
}

.preview img {
    width: 40%;
    margin-top: 5%;
}

.preview:target {
    outline: none;
    display: block;
}

HTML

<article class="item item-1">
            <a href="#either">
                <img src="img/eitherhated.png" alt="">
            </a>
            <!-- https://ae01.alicdn.com/kf/HTB1MaTnabY1gK0jSZTEq6xDQVXan.jpg_q50.jpg -->
            <h2>Either Hated Or Ignored</h2>
            <div class="buy">
                <a href="#">
                    <p>buy</p>
                </a>
            </div>

            <a href="#_" class="preview" id="either">
                <img src="img/eitherhated.png" alt="">
            </a>
</article>