.b24-form-wrapper {
    position: relative;
}
.b24-form-close {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 28px;
    font-weight: bold;
    line-height: 1;
    color: #333;
    cursor: pointer;
    z-index: 9999;
}
.b24-form-close:hover {
    color: #000;
}