JSFiddle - React, Tailwind, and code Playground

HTML

<div class="menu">
    <div class="base">1</div>
    <div class="active">2</div>
</div>

CSS

/* base styles */
.menu .base { 
    transition: all 0.2s;
}

.menu:hover .base {
    margin-top: -50px;
}

/* additional styles */
.menu {
    background: red;
    width: 50px;
    height: 50px;
    line-height: 50px;    
    text-align: center;
    
    overflow: hidden;
}