.rcuk-bis-wrap { margin: 22px 0; }
.rcuk-bis-card {
    background: #f7f9fc;
    border: 1px solid #e1e6ee;
    border-left: 4px solid #cc0000;
    padding: 18px 20px;
    border-radius: 6px;
}
.rcuk-bis-title {
    margin: 0 0 6px;
    font-size: 16px;
    color: #0a0f1e;
    font-weight: 700;
}
.rcuk-bis-sub {
    margin: 0 0 14px;
    font-size: 13px;
    color: #4a5568;
    line-height: 1.4;
}
.rcuk-bis-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.rcuk-bis-email {
    flex: 1 1 220px;
    padding: 10px 12px;
    border: 1px solid #cbd5e0;
    border-radius: 4px;
    font-size: 14px;
    background: #fff;
    line-height: 1.3;
}
.rcuk-bis-email:focus {
    outline: none;
    border-color: #0a0f1e;
    box-shadow: 0 0 0 2px rgba(10, 15, 30, 0.1);
}
.rcuk-bis-submit {
    background: #cc0000;
    color: #fff;
    border: 0;
    padding: 10px 18px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    font-size: 14px;
}
.rcuk-bis-submit:hover { background: #a30000; }
.rcuk-bis-submit:disabled { opacity: 0.6; cursor: wait; }
.rcuk-bis-opt {
    display: block;
    margin-top: 12px;
    font-size: 13px;
    color: #4a5568;
    cursor: pointer;
}
.rcuk-bis-opt input { margin-right: 6px; vertical-align: middle; }
.rcuk-bis-msg {
    margin-top: 10px;
    font-size: 13px;
    min-height: 18px;
    line-height: 1.4;
}
.rcuk-bis-msg.success { color: #0d8050; font-weight: 600; }
.rcuk-bis-msg.error   { color: #b91c1c; }