.overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: #000;
    opacity: 0.7;
}
#modal-content-wrapper {
    position: absolute;
    left: 50%;
    margin: 0 auto;
    z-index: 100;
    width: 100%;
}
.modal-close {
    display: block;
    height: 20px;
    width: 20px;
    position: absolute;
    top: -10px;
    right: -10px;
    background: #000;
    border-radius: 50%;
    border: 2px solid #fff;
    color: #fff;
    box-shadow: 0 0 3px #000;
    cursor: pointer;
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 12px;
    line-height: 21px;
    font-weight: bold;
    text-align: center;
}
#modal-content {
    left: -50%;
    position: relative;
    background: #fff;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 25px;
}