.clickbox{
    display: block;
    position: absolute;
    /* border: 5px solid red;     */
}
.clickbox:hover{
    display: block;
    position: absolute;
    background-image: radial-gradient(rgba(255,255,255,1),rgba(255,255,255,0) 70%);
}
.center{
    margin:auto;
    margin-top: 50px; 
    background-position: center;
}

.backbutton{
    width: 100px;
    margin:auto;
    margin-top: 5px;     
}

.backbutton a img{
    width: 50px;
    display: block;
}

.sip{
    position: relative;
    background-image: url(../Images/sad.gif);
    background-repeat: no-repeat;
    background-size: contain;
}