body {
    padding-top: 50px;
    background-color: #f8f9fa;
}

.qr-code-container {
    margin-left: auto;
    margin-right: auto;
    margin-top: 20px;
}

.card {
    padding: 20px;
}

.textarea-container {
    margin-bottom: 20px;
}

footer {
    background-color: #343a40;
    color: #fff;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
    text-align: center;
}

footer a {
    color: #ffc107;
    text-decoration: none;
}

.btn-group {
    margin-bottom: 15px;
}