body {
                background-color: rgba(200,220,250,0.8);
            }

            .ouvert {
                transform:rotate(-20deg);
                /* transform-origin: left bottom; */
                transition: transform 0.5s;
            }

            .fermé {
                transform:rotate(0deg);
                /* transform-origin: left bottom; */
                transition: transform 0.5s;
            }

            .allumée {
                opacity:1;
                transition: opacity 0.5s;
                stroke-width:0;
            }

            .éteinte {
                opacity:0;
                transition: opacity 0.5s;
                stroke-width:0;
            }