*{
    margin: 0;
    padding: 0;
}
html, body{
    height: 100%;
}
.custom-card{
    width: 18rem;
    box-shadow: 0 5px 5px -3px rgba(0,0,0,.2), 
                0 8px 10px 1px rgba(0,0,0,.14), 
                0 3px 14px 2px rgba(0,0,0,.12);
}