html, body, .container {
    height: 100%;
}
.container {
    display: flex;
    height: 100%;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}
.container form {
    width: 480px;
}
.container form h2, .container form h3 {
    text-transform: uppercase;
    text-align: center;
}
.logo {
    width: 480px;
}
.container img.wide {
    max-width: 100%;
    max-height: 100%;
    height: auto;
}
.container img.tall {
    max-height: 100%;
    max-width: 100%;
    width: auto;
}