.tlk-menu__panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 50px;
    min-height: 100vh;
    padding: 6px 0;
    background-color:#0F009C;
    color: #fff;
    z-index: 90010;
}

}
.tlk-lectures {
    width: 100%;
    min-height: 100vh;
    padding: 100px 0;
    color: #333;
    background-color: blue;
}