/* Structure */
body
{
    font-family: Arial, Helvetica, sans-serif;
    background-color: cornflowerblue;
}

/* Toys */
#toy-list
{
    flex-wrap: wrap;
}
.toy
{
    background-color: white;
    padding: 5px;
    border-radius: 5px;
    margin: 5px;
    opacity: 1;
    position: relative;
    z-index: 1;
    height: 340px;
    color: black;
}

.hidden
{
    display: none;
}

.toy ul
{
    font-size: large;
    position: absolute;
    margin-top: 25%;
    margin-left: 28%;
}

.toy li
{
    list-style-type: none;
    font-size: medium;
}

/* Images */
.toy img
{
    display: block;
    margin: auto;
    width: 100%;
    height: 95%;
}

.toy img:hover
{
    opacity: 0.3;
}


/* Typography */
#heading
{
    text-align: center;
}

@media only screen and (min-width: 500px) {
    #toy-list
    {
        display: flex;
        flex-wrap: wrap;
    }
    #toy-list>*
    {
        flex: 1 1 340px;
    }
    .toy
    {
        flex: 1;
    }
}