body {
    background-image: url(background.png)
}
.container {
    background-color: white;
    background-clip: padding-box;
    border: 10px transparent solid;
    border-image: url(../images/graphics/border_lacewbows.png) 12 round;
    width: 646px;
    margin: 100px auto;
    padding: 3px;
    display: grid;
    grid-template-columns: auto auto auto;
    grid-gap: 10px;
}

.item {
    width: 200px;
    height: 200px;
    position: relative;
}
.item img {
    width: 100%;
}
.item span {
    background-color: rgba(0,0,0,0.5);
    width: 100%;
    height: 100%;
    padding: 0 10px;
    text-align: center;
    text-shadow: 1px 1px 3px black;
    color: white;
    position: absolute;
    top: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: hidden;
}
.item:hover span {
    visibility: visible;
}