add close button on mobile sticky ads style

.jnews_mobile_sticky_ads .jnews-close-ads {
    position: absolute;
    top: -12px;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    padding: 0;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 50%;
    color: #222;
    font-size: 22px;
    font-family: Arial, sans-serif;
    font-weight: 400;
    line-height: 1;
    cursor: pointer;
    appearance: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
    z-index: 10;
}

.jnews_mobile_sticky_ads .jnews-close-ads:hover {
    background: #f5f5f5;
}

.jnews_mobile_sticky_ads .jnews-close-ads:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
}