.overlaydiv {
    position: fixed; /* Sit on top of the page content */
    display: none; /* Hidden by default */
    width: 100%; /* Full width (cover the whole page) */
    height: 100%; /* Full height (cover the whole page) */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5); /* Black background with opacity */
    z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
    cursor: pointer; /* Add a pointer on hover */
    overflow-y: scroll;
}
.insideoverlay {
    position:absolute;
    top: 30%;
    left: 50%;
    min-width:30em;
    min-height:18em;
    margin-top: -9em; /*set to a negative number 1/2 of your height*/
    margin-left: -15em; /*set to a negative number 1/2 of your width*/
    padding-left: 1em;
    padding-right: 1em;
    border: 1px solid #ccc;
    background-color: #f3f3f3;
    box-shadow: 2px 3px 2px #0b0b0b;
}


.tooltip1 {
    display:inline-block;
    position:relative;
    text-align:left;
}

.tooltip1 .top {
    min-width:200px;
    top:-20px;
    left:50%;
    transform:translate(-50%, -100%);
    padding:10px 20px;
    color:#444444;
    background-color:#EEEEEE;
    font-weight:normal;
    font-size:13px;
    border-radius:8px;
    position:absolute;
    z-index:99999999;
    box-sizing:border-box;
    box-shadow:0 1px 8px rgba(0,0,0,0.5);
    display:none;
}

.tooltip1:hover .top {
    display:block;
}

.tooltip1 .top i {
    position:absolute;
    top:100%;
    left:50%;
    margin-left:-12px;
    width:24px;
    height:12px;
    overflow:hidden;
}

.tooltip1 .top i::after {
    content:'';
    position:absolute;
    width:12px;
    height:12px;
    left:50%;
    transform:translate(-50%,-50%) rotate(45deg);
    background-color:#EEEEEE;
    box-shadow:0 1px 8px rgba(0,0,0,0.5);
}