.mosaicflow__column {
            float: left;
        }

        .mosaicflow__item {
            position: relative;
        }

            .mosaicflow__item img {
                display: block;
                width: 100%;
                max-width: 500px;
                height: auto;
                /*    padding: 5px;      blanc entre photo*/
            }

            .mosaicflow__item p {
                position: absolute;
                bottom: 0;
                left: 0;
                width: 100%;
                margin: 0;
                padding: 5px; /*  */
                background: hsla(0,0%,0%,.5);
                color: #fff;
                font-size: 14px;
                text-shadow: 1px 1px 1px hsla(0,0%,0%,.75);
                opacity: 0;
                -webkit-transition: all 0.4s cubic-bezier(0.23,1,0.32,1);
                -moz-transition: all 0.4s cubic-bezier(0.23,1,0.32,1);
                -o-transition: all 0.4s cubic-bezier(0.23,1,0.32,1);
                transition: all 0.4s cubic-bezier(0.23,1,0.32,1);
            }

            .mosaicflow__item:hover p {
                opacity: 1;
            }