#bookgrid li {
    width: calc(25% - 2px);
    margin: 1px;
    float: left;
    background-size: 100% 100% !important;
    background-position: center;
    -moz-transition: background-size 0.5s;
    -webkit-transition: background-size 0.5s;
    -o-transition: background-size 0.5s;
    -ms-transition: background-size 0.5s;
    transition: background-size 0.5s
    }
#bookgrid li:hover {
    /*background-size:120% 120% !important;*/
    cursor: pointer
    }
#bookgrid li span {
    display: block;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    font-size: 16px;
    text-align: center;
    font-family: futura;
    text-transform: uppercase;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
    -moz-transition: font-size 0.5s;
    -webkit-transition: font-size 0.5s;
    -o-transition: font-size 0.5s;
    -ms-transition: font-size 0.5s;
    transition: font-size 0.5s
    }
#bookgrid li:hover span {
    /*font-size: 1.5em;*/
    }
#tempgrid {
    display: none
    }
@media screen and (max-width: 729px) {
    #bookgrid li {
        width: calc(50% - 2px)
        }
    }
@media screen and (max-width: 400px) {
    #bookgrid li {
        width: calc(100% - 2px)
        }
    }