#element_to_pop_up
{
    background-color: #fff;
    border-radius: 11px;
    border: 1px solid #F7CE39;
    color: #000;
    display: none;
    padding: 20px;
    min-width: 400px;
    min-height: 180px;
}

.b-close
{
    cursor: pointer;
    position: absolute;
    right: -7px;
    top: -7px;
    font: bold 131% sans-serif;
    padding: 2px 12px 2px;
    background-color: #F7CE39;
    border-radius: 10px;
    box-shadow: 0 2px 3px rgba(0, 0, 0, 0.3);
    display: inline-block;
    text-align: center;
    text-decoration: none;
    color: #800000;
}