.pure-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
}

.pure-modal-content {
    background: white;
    width: 350px;
    margin: 12% auto;
    padding: 20px;
    border-radius: 6px;
    text-align: center;
}

.close-btn {
    margin-top: 15px;
    background: #999;
    color: white;
    padding: 8px 15px;
    border: none;
    cursor: pointer;
}