#bar-mainnav #offcanvasmnavbg.collapse.show {
    position: fixed;
    top: 0;
    left: 0;
    background: rgba(33, 33, 33, 0.9);
    width: 100%;
    height: 100%;
    z-index: 1000;
}

#bar-mainnav #offcanvasmnav {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1040;
    display: flex;
    flex-direction: column;
    
    
    width: 100%;
    max-width: 400px;
    margin: 0;
    
    visibility: hidden;
    background-color: #fff;
    background-clip: padding-box;
    outline: 0;
    transition: none;
}

#bar-mainnav #offcanvasmnav.collapse.show {
    visibility: visible;
    overflow: auto;
    border: 1px solid #777;
    height: 100vh;
}

#bar-mainnav #offcanvasmnav.collapse.show a.w3-bar-item, 
#bar-mainnav #offcanvasmnav.collapse.show .w3-dropdown-hover > a.w3-button {
    text-align: left;
    padding: 6px 15px;
    display: table;
    width: 100%;
}

#bar-mainnav #offcanvasmnav.collapse.show .w3-dropdown-hover > .w3-dropdown-content {
    display: block;
    position: relative;
}