.menu {
    max-width: 400px;
    margin: 0 auto;
    padding: 0;
}

.menu a {
    display: block;
    padding: 6px;
    text-decoration: none;
    color: #000;
    line-height: 0;
}

label {
    display: block;
    margin: 0 0 1px 0;
    padding : 6px;
    line-height: 1;
    color :#fff;
    background :#336666;
    cursor :pointer;
}

input {
    display: none;
}

.menu ul {
    margin: 0;
    padding: 0;
    background :#fff;
    list-style: disc;
}

.menu li {
    max-height: 0;
    overflow-y: hidden;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
    -ms-transition: all 0.5s;
    -o-transition: all 0.5s;
    transition: all 0.5s;
}
#menu_bar00:checked ~ #links00 li,
#menu_bar01:checked ~ #links01 li,
#menu_bar02:checked ~ #links02 li,
#menu_bar03:checked ~ #links03 li,
#menu_bar04:checked ~ #links04 li,
#menu_bar05:checked ~ #links05 li,
#menu_bar06:checked ~ #links06 li,
#menu_bar07:checked ~ #links07 li,
#menu_bar08:checked ~ #links08 li,
#menu_bar09:checked ~ #links09 li,
#menu_bar10:checked ~ #links10 li,
#menu_bar11:checked ~ #links11 li,
#menu_bar12:checked ~ #links12 li,
#menu_bar13:checked ~ #links13 li,
#menu_bar14:checked ~ #links14 li {
    max-height: 46px;
    opacity: 1;
}