body {
    color: #86b300;
    background-color: #dfff66;
   <!-- cursor: help;-->
}

.center {
    text-align: center;
    cursor: default;
}

#principale {
    margin-left: 20px;
    margin-right: 20px;
}

a:link {
    color: #86b300;
    text-decoration: none;
}

a:hover {
    color: #86b300;
    text-decoration: underline;
    cursor: pointer;
}

.menu {
    width: 100%;
    float: left;
    margin: 0;
    padding: 0;
    background: #ffffcc;
}

.menu ul {
    list-style-type: none;
}

.menu li {
    float: left;
    display: block;
    width: auto;
    height: auto;
    margin: 5px;
}

.menu li:hover {
    background:#dfff66;
}