html {
    position: relative;
    min-height: 100%;
}

body {
    margin-bottom: 50px; /* Margin bottom by footer height */
}

.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 50px; /* Set the fixed height of the footer here */
    line-height: 50px; /* Vertically center the text there */
    background-color: #f5f5f5;
}

.invalid-feedback {
    display: block;
}

body > .container {
    padding-top: 50px;
}