Nepropustné menu

#sidebar {
    margin-right: auto;
    margin-top: auto; 
    position: absolute;
    background: white;
    width: 195px;
    height: 55%;
    box-sizing: border-box;
   -moz-box-sizing: border-box;
}
#sidebar ul { 
    margin-top: 60px;
    padding: 0;
    list-style: none;
}
#sidebar ul li {
    margin: 0;
}
#sidebar ul li a {
    padding: 15px 20px;
    font-size: 16px;
    font-weight: 100;
    color: black;
    text-decoration: none;
    display: block;
    border-bottom: 1px solid #000010;
    -webkit-transition:  background 0.3s ease-in-out;
    -moz-transition:  background 0.3s ease-in-out;
    -ms-transition:  background 0.3s ease-in-out;
    -o-transition:  background 0.3s ease-in-out;
    transition:  background 0.3s ease-in-out;
}
#sidebar ul li:hover a {
    background: #C9223D;
}
/*konec leveho menu /*