.mar-box {
    background: #0f172a;
    color: #ffffff;
    padding: 20px;
    border-radius: 14px;
    margin-bottom: 20px;
}

.mar-note {
    font-size: 0.9em;
    opacity: 0.85;
    margin-top: 10px;
}

.mar-saldo {
    font-size: 1.4em;
    font-weight: bold;
    margin: 10px 0;
}