.navbar-brand, .navbar-banner {
    height: auto;
    margin: 0;
    padding: 0;
}
.navbar-brand img {
    max-width: 50%;
    width: 40vw;
    height: auto;
}
.navbar-banner {
    max-width: 100%;
}
.index-banner {
    max-width: 40%;
    width: 40vw;
    height: auto;    
}
.card {
    margin-bottom: 20px;
}
.powered-by {
    height:16px;
    vertical-align:middle;
    opacity:0.6;
}
footer p {
    margin: 0.25rem 0;
    line-height: 1.3;
}