.sepa-box {
    background: linear-gradient(135deg,#0f0f0f,#1c1c1c);
    padding: 25px;
    max-width: 420px;
    color: #fff;
    border-radius: 12px;
}

.sepa-box input,
.sepa-box button {
    width: 100%;
    margin: 8px 0;
    padding: 10px;
}

.sepa-box button {
    background: gold;
    border: none;
    font-weight: bold;
    cursor: pointer;
}

.sepa-bank {
    background: #000;
    padding: 10px;
    margin-bottom: 15px;
    border-left: 4px solid gold;
}

.sepa-success { color: #0f0; }
.sepa-error { color: red; }