#centerDiv { width: 100%; height:90%; margin: 0 auto; background-color:#FFA500 ; } 
        
#div1 { width: 33%; height:200px; background-color:#A52A2A ; float:left; } 
            
#div2 { width: 34%; height:200px; background-color:#522B72 ; float:left; } 
            
#div3 { width: 33%; height:200px; background-color:#008000 ; float:left; } 

#tooltip{
  display:none;
}
#bigdiv:hover #tooltip{
  display:block;
}

/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content/Box */
.modal-content {
    background-color: #fefefe;
    margin: 15% auto; /* 15% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 80%; /* Could be more or less, depending on screen size */
}

p.black {
    color: black;
}

/* The Close Button */
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}