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

.content {
    flex: 1;
    padding: 20px;
}

.footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: sticky;
    bottom: 0;
    width: 100%;
}