JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">
    <div class="block-pannel">
        <h2>Hi</h2>
    </div>
</div>

CSS

.block{
    position: relative;
    margin: 50px;
    width: 200px;
    height: 200px;
    overflow: hidden;
    background-color: #85868D;
    border-radius: 3px;
    cursor: pointer;
}

.block-pannel{
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute: 
    top: 0;
    left: 0;
    width: inherit;
    height: inherit;
    background-color: #333;
    border-radius: 3px;
    transform: translate(0, -100%);
    transition: .5s ease;
}

.block-pannel h2{
    font-size: 25px;
    color: #fff;
}

.block:hover .block-pannel{
    transform: translate(0, 0);
}