.ymaps-2-1-79-balloon__layout {
    border: 1px solid #CCCCCC;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    text-align: center;
    background-color: #FFF7B8;
    text-decoration: none;
}