body {
    background-image: url("R.jpg");
      user-select: none;

}

#rectangle {
    bottom: 0px;
    left: 0%;
    width: 100%;
    position: fixed;
    border-radius: 0px;
    height: 50px;
    z-index: 99999;

}

#start-btn {
  width: 75px;
  height: 75px;
  position: relative;
  overflow: hidden;
  left: -7px;
  bottom: 13px;
}

#start-btn .bg {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: url('Windows 7.png'); /* Assurez-vous que le chemin est correct */
  background-size: 100% 300%;
  transition: opacity 0.5s ease;
  opacity: 0;
}

#start-btn .bg:first-child {
  opacity: 1;
  background-position: 0 0; /* Position initiale : haut */
}

#start-btn:hover .bg.hover {
  opacity: 1;
  background-position: 0 -75px; /* Déplace l'image au milieu */
}

#start-btn:active .bg.active {
  opacity: 1;
  background-position: 0 -150px; /* Déplace l'image au bas */
}

#start-btn .bg.hover, #start-btn .bg.active {
  opacity: 0;
}

iframe {border: none}

#window-buttons {
  position: absolute;
  bottom: 10px;
  left: 70px;
  height: 40px;
  width: 65%;
  box-sizing: border-box;
  display: flex;
}


.Taskbar {
    margin-left: 10px;       
    border-radius: 4px;
    padding: 5px 10px;
    height: 40px;
    width: 50px;
    color: white;
    display: flex;             /* Active Flexbox */
    justify-content: center;   /* Centre horizontalement */
    align-items: center;       /* Centre verticalement */    box-shadow: inset 0 0 2px #fff, inset 0 1px 3px hsla(0, 0%, 100%, .6), 0 1px 1px rgba(0, 0, 0, .8), -1px -1px 1px rgba(0, 0, 0, .2), 1px -1px 1px rgba(0, 0, 0, .2);
    background: linear-gradient(180deg, hsla(0, 0%, 100%, .5), hsla(0, 0%, 100%, .2) 40%, rgba(39, 71, 86, .5) 50%, rgba(39, 71, 86, .1) 90%, hsla(0, 0%, 100%, .5));

}
.Taskbar:hover {
background-color: rgba(200,200,255,0.5);
}
.Taskbar:active {
background-color: rgba(20,20,50,0.5);
}