html{
    background-color: #212529;
}
body{
    background-color:#212529;
    display: flex;
    flex-flow: column;
    height: 100%;
}
.container {
    margin: auto;
  }
.nav-item a {
    font-family :Verdana, Geneva, Tahoma, sans-serif;
    font-size: larger;
    align-items: center;
}
.nav-item{
    margin-left: 10px;
}

#footer {
    color: white;
    position: fixed;
    bottom: 0;
    width: 100%;
    left: 0px;
    text-align: center;
    
}
#essai {
    background-color: aliceblue;
    padding: 15px;
}

.rigolo{
    background-color: yellowgreen;
}
.rigolo ul{
    list-style-type: none;
    color: blueviolet;
}