.container {
    display: none;
    position: absolute;
    z-index: 9999;
    top: 0;
    color: black;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4); /* Black w/ opacity */
}

.wrapper {
    position: relative;
    height: 100%;
    width: 100%;
}

.content {
    background-color: #fefefe;
    margin: auto;
    position: relative;
    top: 30%;
    font-size: 100%;
    height: 40%;
    padding: 10px;
    border: 1px solid #888;
    width: 90%;
}

.piece {
    font-size: 5rem;
    height: 100%;
    width: 25%;
    cursor: pointer;
    display: inline-block;
    text-align: center;

    img {
        max-width: 100%;
    }
}

.piece:hover{
    background-color: #cccccc;
    border-radius: 5px;
}

.piece-wrapper {
    height: 80%;
    width: 100%;
}


#close-button {
    border-radius: 4px;
    background-color: #4CAF50;
    border: none;
    color: white;
    padding-left: 5px;
    padding-right: 5px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

.selected{
    border:2px solid #00B919;
    border-radius: 4px;
    box-sizing: border-box;
}