.content{
     position: relative;
     width: 100%;
     height: 100%;

     .rangee{
          position: absolute;
          display: flex;
          justify-content: space-between;
          flex-direction: column;
          width: 100%;
          height: 100px;
     }

     .rangee:nth-child(2){
          top: 20%;
     }

     .rangee:nth-child(3){
          top: 50%;
     }

     .rangee:last-child{
          bottom: 0%;
     }

     .ligne{
          position: relative;
          width: 100%;
          /* margin-bottom: calc(100px / 4); */
          border: 1px solid #0000005d;
     }

     .tempo{
          position: absolute;
          bottom: 0;
          height: 100%;
          display: flex;
          justify-content: space-around;
          width: 100%;
          box-sizing: border-box;
     }

     .mesure{
          position: relative;
          bottom: 0;
          height: 100%;
          width: 1px;
          border: 1px solid #0000005d;
     }

     .mesure:first-child{
          margin-left: 30px;
     }
}

#musique-lettres-stage{
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
}