#popupSponsor {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999999;
}

.popup-box {
    background: #fff;
    max-width: 420px;
    width: 90%;
    padding: 25px;
    text-align: center;
    border-radius: 12px;
}

.btn-sponsor {
    display: block;
    margin-top: 20px;
    padding: 14px;
    background: #e63946;
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    border-radius: 8px;
}
.btn-sponsor:hover {
    background: #c1121f;
}