Menu glissant

<meta charset="utf-8" /><title></title><style type="">{
                      
  padding:0;
  margin:0;
  height:100%;
}
#menu, #menu ul {
    position:fixed; top:0; width:100%; 
  padding:0;
  margin:0;
  list-style: none;
  text-align: center;
}

#menu li {
  display:inline-block;
  vertical-align: top;
  position: relative;
}
#menu li li {
  display:inherit;
}
#menu a {
  display:block;
  padding:4px 53.65px;
  text-decoration: none;
  color:#fff;
  font-family:arial;
}
#menu ul li a {
  padding:5px 8px;
}
#menu ul {
  position: absolute;
  z-index: 1000;
  min-width:100%;
  white-space: nowrap;
  text-align: left;
}
#menu ul ul {
  left:100%;
  top:0;
  overflow: hidden;
  max-width: 0;
  min-width: 0;
  transition: 0.3s all;
}
#menu ul li:hover ul {
  max-width: 30em;
}
#menu ul li {
  max-height:0;
  overflow: hidden;
  transition:all 0.8s;
}
#menu li li li {
  max-height: inherit;
}
#menu li:hover li {
  max-height: 15em;
  overflow: visible;
}
/* background des liens menus */
.violet {
  background-color:#848484;
background-image:linear-gradient(to bottom, #729EBF 0%, #333A40 100%);
}
.violet li {
   background:#333A40
}
.violet li:hover {
   background:#729EBF
}
.bleu {
background-color: #848484;
background-image:linear-gradient(to bottom, #729EBF 0%, #333A40 100%);
}
.bleu li {
    background:#333A40
}
.bleu li:hover {
    background:#729EBF
}
.orange {
background-color:#848484;
background-image:linear-gradient(to bottom, #729EBF 0%, #333A40 100%);
}
.orange li {
    background:#333A40
}
.orange li:hover {
    background:#729EBF
}
.vert{
background-color: #848484;
background-image:linear-gradient(to bottom, #729EBF 0%, #333A40 100%);
}
.vert li {
    background:#333A40
}
.vert li:hover {
   background:#729EBF
}
#menu li:hover {
    background-image:none;
}
#menu li:hover a, .menu li li:hover a {
    color:#000
}
#menu li:hover li a, #menu li:hover li li a {
    color:#fff
}
#menu li:hover a, #menu li li:hover a, #menu li li li:hover a {
    color:#000