.lessons li
{
    float: left;
    width: 33%;
    margin-bottom: 14px; 
}

#culture .menu-wrapper
{
    background: #f6f5f5;
}

#culture .menu-wrapper h2
{
    margin-top: 0;
    margin-bottom: 0;
}

#culture .menu
{
    border-top: solid 1px #fff;
    margin: 0 12px 16px 12px;
    padding: 0 22px;
}

#rest 
{
}

#lessons #knowledge .menu-wrapper
{
    border: solid 1px #000;
}