.vb-ref-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    font-family: Poppins, sans-serif;
    animation: vbRefFadeIn 0.25s ease-out;
}
.vb-ref-modal {
    background: #fff;
    border-radius: 14px;
    padding: 32px 28px;
    max-width: 420px;
    width: 100%;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    animation: vbRefSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.vb-ref-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: transparent;
    border: none;
    font-size: 26px;
    color: #595959;
    cursor: pointer;
    padding: 4px 10px;
    line-height: 1;
    font-family: inherit;
}
.vb-ref-close:hover { color: #1a1a1a; }
.vb-ref-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0 0 12px;
    line-height: 1.25;
    padding-right: 30px;
}
.vb-ref-body {
    font-size: 14px;
    color: #595959;
    line-height: 1.6;
    margin: 0 0 18px;
}
.vb-ref-code {
    background: #fef7f7;
    border: 1px dashed #d42535;
    border-radius: 8px;
    padding: 12px;
    text-align: center;
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: 700;
    color: #d42535;
    margin: 0 0 18px;
    letter-spacing: 1px;
}
.vb-ref-cta {
    width: 100%;
    background: #d42535;
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    font-family: Poppins, sans-serif;
}
.vb-ref-cta:hover { background: #8c1520; }
@keyframes vbRefFadeIn {
    from { opacity: 0; } to { opacity: 1; }
}
@keyframes vbRefSlideIn {
    from { transform: translateY(20px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
}
@media (max-width: 480px) {
    .vb-ref-modal { padding: 24px 20px; }
    .vb-ref-title { font-size: 19px; }
    .vb-ref-code { font-size: 16px; }
}