.flex {
    display: -webkit-flex;
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
}

.album {
    @extend .flex;

    .item {
        @extend .flex;
        flex: auto;
        margin: 10px;
        justify-content: center;

        &:hover {
            opacity: 0.7;
        }

        img {
            width: 100%;
        }
    }
}