/* Overlay */
#rsvp-modal {
    display: none; /* hidden by default */
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
}

/* Popup box */
.rsvp-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 20px;
    border-radius: 6px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

/* Close button */
.rsvp-close {
    color: #aaa;
    float: right;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
}
.rsvp-close:hover {
    color: #000;
}