popup.css

/* Popup container - can be anything you want */
.popup {
    position: relative;
    display: inline-block;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* The actual popup */
.popup .popuptext {
    visibility: hidden;
    width: 160px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 8px 0;
    position: absolute;
    z-index: 1;
    top: 125%;
    left: 50%;
    /*margin-left: -80px;*/
}

/*!* Popup arrow *!*/
/*.popup .popuptext::after {*/
/*    content: "";*/
/*    position: absolute;*/
/*    top: 100%;*/
/*    left: 50%;*/
/*    margin-left: -5px;*/
/*    border-width: 5px;*/
/*    border-style: solid;*/
/*    border-color: #555 transparent transparent transparent;*/
/*}*/

/* Toggle this class - hide and show the popup */
.popup .show {
    visibility: visible;
    -webkit-animation: fadeIn 1s;
    animation: fadeIn 1s;
}

/* Add animation (fade in the popup) */
@-webkit-keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity:1 ;}
}