<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.container {
position: relative;
width: 50%;
}
.image {
display: block;
width: 100%;
height: auto;
}
.overlay {
position: absolute;
bottom: 0;
left: 0;
right: 0;
background-color: #008CBA;
overflow: hidden;
width: 100%;
height: 0;
transition: .5s ease;
}
.container:hover .overlay {
height: 100%;
}
.text {
color: white;
font-size: 20px;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
text-align: center;
}
</style>
</head>
<body>
<h2>Slide in Overlay from the Bottom</h2>