.slider {
  position: relative;
  width: 50%;
}

.slider_image {
  display: block;
  width: 100%;
  height: auto;
}

.slider_overlay {
  position: absolute;
  bottom: 100%;
  left: 0;
  right: 0;
  background-color: #ff800a;
  overflow: hidden;
  width: 100%;
  height:0;
  transition: .5s ease;
}

.slider:hover .slider_overlay {
  bottom: 0;
  height: 100%;
}

.slider_text {
  white-space: nowrap; 
  color: white;
  font-size: 20px;
  position: absolute;
  overflow: hidden;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}



<!-- STRONA-->
<div class="responsive">	
	<div class="slider">
	  <img src="images/card_prev.jpg" alt="Avatar" class="slider_image">
	  <div class="slider_overlay">
		<div class="slider_text">CARD DESCRIPTION</div>
	  </div>
	</div>
</div>