* {
    box-sizing: border-box;
}

body {
    background-color: steelblue;
    display: flex;  
    align-items: center;
    justify-content:center;
    height: 100vh;
    overflow: hidden;
    margin: 0;    
    
}

.empty {
    height: 150px;
    width: 150px;
    margin: 10px;
    border: solid 3px black;
    background: white;
}
.fill {
    background-image: url('https://i.pinimg.com/originals/dd/f4/c8/ddf4c868766da38078bc3d6b54063908.jpg');
    background-size: 145px 145px;
    height: 145px;
    width: 145px;
    cursor: pointer;
}
.hold {
    border: solid 5px #ccc;
}
.hovered {
    background-color: #333;
    border-color: white;
    border-style: dashed;
}

@media (max-width: 800px) {
    body {
        flex-direction: column;
    }
    
}