html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.wrapper {
    flex: 1;
}

footer {
    background-color: #003366;
    color: #fff;
    text-align: center;
    padding: 10px;
    font-size: 14px;
}