Footer Always At Bottom CSS trick

base.html

 <div class="wrapper">
   <!-- Put your main page content here -->
 </div>
 <footer>
   <!-- Put your footer content here -->
 </footer>

screen.css

html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
}

.wrapper {
    flex: 1 0 auto;
    padding: 0;
}

footer {
    z-index: 1;
    flex-shrink: 0;
    width: 100%; 
}