JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
  <div class="inner">
  срака
  </div>
</div>

CSS

.outer {
  margin: 100px auto;
  width: 300px;
  height: 150px;
  background: rgb(45, 55, 65);
  position: relative;
  overflow: hidden;
  border-radius: 0 10px 0 0;
}

.inner {
  width: 100%;
  height: 50px;
  color: white;
  background-color: darkblue;
  position: absolute;
  text-align: center;
  font: 1.2em arial;
  line-height: 2.4em;
  transition: opacity 1.5s 0.5s, background-color 1.5s 0.5s;
  opacity: 0;
  bottom: 0px;
}

.outer:hover .inner{
  background-color: black;
  transition-duration: 0s;
  transition-delay: 0s;
  opacity: 1;
  animation-name: fadeOut;
  animation-duration: 0.25s;
}

@keyframes fadeOut {
  from {
    bottom: -50px;
  }
  to {
    bottom: 0px;
  }
}