style.css

*{
    box-sizing: border-box;
}

body{
    overflow:hidden;
}

#header{
    width:100%;
    height:30px;
    box-shadow:0px 0px 2px rgba(0,0,0,0.2)
}

#header .button{
    width:25px;
    height:15px;
    box-shadow:0px 0px 2px rgba(0,0,0,0.5);
    float:right;
    margin:7px 7px 0px 0px;
    cursor: pointer;
}

#header .button.selected{
    box-shadow:0px 0px 2px rgba(0,0,0,1);
}

#wrapper{
    position: absolute;
    width: calc(100% - 15px);
    height: calc(100% - 54px);
    box-shadow: 0px 0px 2px rgba(0,0,0,0.2);
    margin-top: 8px;
    overflow-y: hidden;
}

#wrapper #scrollDiv{
    position: absolute;
    height:100%;
}

.tile {
    position: relative;
    float: left;
    box-shadow: 0px 0px 2px rgba(0,0,0,0.2);
    margin: 5px;
    transition: all 0.5s;
    background-size:auto 100%;
    background-repeat:no-repeat;
    cursor:pointer;
}

.tile.grid{
    width: 150px;
    height: 150px;
}

.tile.list{
    width: 200px;
    height: 50px;
}

.caption{
    position: absolute;
    width: 100%;
    height: 40px;
    background-color: white;
    bottom: 0px;
    box-shadow: 0 0px 2px rgba(0,0,0,0.1);
    font-family: sans-serif;
    padding: 3px;
}

#modal{
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background-color:rgba(0,0,0,0.8);
    font-size: 20px;
    font-family: sans-serif;
    color: white;
}

#modal #title{
    position: absolute;
    left: 20px;
    top: 20px;
}

#modal #close{
    position: absolute;
    top: 13px;
    right:20px;
    cursor: pointer;
}

#modal #close:hover{
    color: grey;
}

#modal img{
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    margin: auto;
}