Suggested HTML:
<a class="rm-toggle rm-button rm-nojs" href="#">Menus</a>
<nav class="rm-nav rm-nojs rm-lighten">
	<ul> ...

Theme class options: rm-lighten(as illustrated above), rm-darken.
rm-lighten theme lightens menu item backgrounds.
rm-darken theme darkens menu item backgrounds.
Set menu background color to any color
to work with the chosen theme.
*/

/* Set menu background color here */
.rm-nav ul,
.rm-menu {}

/* Required styles =========================================================== */

/* Add clearfix to nav element container*/
.rm-container:after {
    content: " ";
    display: table;
    clear: both;}

/* Toggle Link styles */
.rm-toggle {
    display:  none;
    float: right;
    height: 2em;
    text-decoration: none;
    text-transform: uppercase;}
.rm-toggle.rm-show {
    display: inline-block;}

/* Toggle Button styles */
.rm-toggle.rm-button {
    /* use data uri */

	display:block;
    /* or use png */
    /*background-image:url(menu-btn.png);*/
	width: 50px;height:50px;
    white-space: nowrap;
    overflow: hidden;
	position:fixed;
	top:0px;
	right:5px;
	background-size:110%;
	display:block;
	z-index:11;
	background-color:#fff;}

/* Menu Container Element */
.rm-nav {
    clear: both;}

/* Menu Element */
.rm-nav > ul,
.rm-top-menu {
	width:200px;
    clear: both;
    list-style: none;
    padding: 0;
    margin-left: 0;
    margin-bottom: 0;
    zoom: 1;
	margin-top:0px;}

/* Menu & Sub Menu Items */
.rm-nav li,
.rm-menu-item {
    position: relative;
	background-color:#b61c11;}
.rm-nav > ul > .rm-last,
.rm-top-menu > .rm-last {}
.rm-nav li a,
.rm-menu-item a {
    padding: .75em 1em;
    display: block;
    position: relative;
    color:#fff;
    text-decoration: none;}
.rm-nav span{ text-align:center; line-height:1.5rem; padding-right:5px;}

/* Sub Menus */
.rm-nav li ul,
.rm-menu-item .rm-menu {
    width: 100%;
    padding:0;
    margin-left: 0;
    list-style: none;
    z-index: 500;
    zoom: 1;}
.rm-nav .rm-hover ul,
.rm-nav .rm-hover .rm-menu {
    z-index: 600;}

/* Sub Menu Items */
.rm-nav li li a,
.rm-menu-item .rm-menu-item a {
    z-index:500;
    padding-left: 3em;}
.rm-nav li li.rm-last a,
.rm-menu-item .rm-menu-item.rm-last a {
    padding-bottom: 1em;}
.rm-nav li li ul,
.rm-menu-item .rm-menu-item .rm-menu {
    position: static;}

.rm-nav li li li a,
.rm-menu-item .rm-menu-item .rm-menu-item a {
    z-index:600;
    padding-left: 5em;}

/* CSS Animations ============================================================= */
.rm-accelerate {
    -webkit-transform: translate3d(0,0,0);
    transform: translate3d(0,0,0);
    -webkit-backface-visibility:hidden;
    -webkit-perspective: 1000;}
.rm-css-animate {
    display: block;
    max-height: 0;
    overflow: hidden;}
.rm-css-animate.rm-menu-expanded {
    overflow: visible;}

/* Theme styles ============================================================= */

.rm-nav a {
    -webkit-transition: background-color 0.3s;
    transition: background-color 0.3s;}

.rm-toggle:hover,
.rm-toggle:focus {
    
    outline: none;}

.rm-lighten li li a,
.rm-lighten li a:focus,
.rm-lighten li a:hover,
.rm-lighten li.rm-hover a,
.rm-lighten .rm-menu-item .rm-menu-item a,
.rm-lighten .rm-menu-item a:focus,
.rm-lighten .rm-menu-item a:hover,
.rm-lighten .rm-menu-item.rm-hover > a {
	
    background-color: #791010; /* fallback */
	
    outline: none;}

.rm-lighten li li li a,
.rm-lighten li li a:focus,
.rm-lighten li li a:hover,
.rm-lighten li li.rm-hover a,
.rm-lighten .rm-menu-expanded li a:focus,
.rm-lighten .rm-menu-expanded li a:hover,
.rm-lighten .rm-menu-item .rm-menu-item .rm-menu-item a,
.rm-lighten .rm-menu-item .rm-menu-item a:focus,
.rm-lighten .rm-menu-item .rm-menu-item a:hover,
.rm-lighten .rm-menu-item .rm-menu-item.rm-hover a,
.rm-lighten .rm-menu-expanded li a:focus,
.rm-lighten .rm-menu-expanded li a:hover {
    background-color: #8d170f; /* fallback */
	 outline: none;}

.rm-lighten li li li a:focus,
.rm-lighten li li li a:hover,
.rm-lighten li li li.rm-hover a,
.rm-lighten li .rm-menu-expanded a:focus,
.rm-lighten li .rm-menu-expanded a:hover,
.rm-lighten .rm-menu-item .rm-menu-item .rm-menu-item a:focus,
.rm-lighten .rm-menu-item .rm-menu-item .rm-menu-item a:hover,
.rm-lighten .rm-menu-item .rm-menu-item .rm-menu-item.rm-hover a,
.rm-lighten .rm-menu-item .rm-menu-expanded a:focus,
.rm-lighten .rm-menu-item .rm-menu-expanded a:hover {
    background-color: #791010;}

.rm-darken li li a,
.rm-darken li a:focus,
.rm-darken li a:hover,
.rm-darken li.rm-hover a,
.rm-darken .rm-menu-item .rm-menu-item a,
.rm-darken .rm-menu-item a:focus,
.rm-darken .rm-menu-item a:hover,
.rm-darken .rm-menu-item.rm-hover > a {
    background-color: #8d170f; /* fallback */
    outline: none;}

.rm-darken li li li a,
.rm-darken li li a:focus,
.rm-darken li li a:hover,
.rm-darken li li.rm-hover a,
.rm-darken .rm-menu-expanded li a:focus,
.rm-darken .rm-menu-expanded li a:hover,
.rm-darken .rm-menu-item .rm-menu-item .rm-menu-item a,
.rm-darken .rm-menu-item .rm-menu-item a:focus,
.rm-darken .rm-menu-item .rm-menu-item a:hover,
.rm-darken .rm-menu-item .rm-menu-item.rm-hover a,
.rm-darken .rm-menu-expanded li a:focus,
.rm-darken .rm-menu-expanded li a:hover {
    background-color: rgb(160, 160, 160); /* fallback */
    background-color: rgba(0, 0, 0, .2);}
.rm-darken li li li a:focus,
.rm-darken li li li a:hover,
.rm-darken li li li.rm-hover a,
.rm-darken li .rm-menu-expanded a:focus,
.rm-darken li .rm-menu-expanded a:hover,
.rm-darken .rm-menu-item .rm-menu-item .rm-menu-item a:focus,
.rm-darken .rm-menu-item .rm-menu-item .rm-menu-item a:hover,
.rm-darken .rm-menu-item .rm-menu-item .rm-menu-item.rm-hover a,
.rm-darken .rm-menu-item .rm-menu-expanded a:focus,
.rm-darken .rm-menu-item .rm-menu-expanded a:hover {
    background-color: rgb(128, 128, 128); /* fallback */
    background-color: rgba(0, 0, 0, .3);}

/* Expanded Layout styles - .rm-layout-expanded class is applied by plugin ========= */

.rm-layout-expanded .rm-nav > ul,
.rm-layout-expanded .rm-top-menu {
    margin-bottom: 0;}

.rm-layout-expanded .rm-nav > ul > li,
.rm-layout-expanded .rm-top-menu > .rm-menu-item {
    float: left;}
.rm-layout-expanded .rm-nav > ul > .rm-last,
.rm-layout-expanded .rm-top-menu > .rm-last {
    margin-bottom: 0;}
.rm-layout-expanded .rm-nav > ul > li > a,
.rm-layout-expanded .rm-top-menu > .rm-menu-item > a {
    height: 3em;
    line-height: 3em; /* match with height to center vertically */
    padding-top: 0;
    padding-bottom: 0;}
.rm-layout-expanded li ul,
.rm-layout-expanded .rm-menu-item .rm-menu {
    width: 15em;
    position: absolute;
    left: 0;}
.rm-layout-expanded li.rm-last ul,
.rm-layout-expanded .rm-menu-item.rm-last .rm-menu,
.rm-layout-expanded li.rm-2nd-last ul,
.rm-layout-expanded .rm-menu-item.rm-2nd-last .rm-menu {
    left: auto;
    right: 0;}
.rm-layout-expanded li li ul,
.rm-layout-expanded .rm-menu-item .rm-menu-item .rm-menu {
    position: absolute;
    left: 100%;
    top: 0;}
.rm-layout-expanded li li.rm-last ul,
.rm-layout-expanded .rm-menu-item .rm-menu-item.rm-last .rm-menu,
.rm-layout-expanded li li.rm-2nd-last ul,
.rm-layout-expanded .rm-menu-item .rm-menu-item.rm-2nd-last .rm-menu{
    right: 100%;
    left: auto;}
.rm-layout-expanded li a,
.rm-layout-expanded li li a,
.rm-layout-expanded li li li a,
.rm-layout-expanded .rm-menu-item a,
.rm-layout-expanded .rm-menu-item .rm-menu-item a,
.rm-layout-expanded .rm-menu-item .rm-menu-item .rm-menu-item a {
    padding-left: 1em;}

/* clearfix */
.rm-layout-expanded .rm-nav > ul:before,
.rm-layout-expanded .rm-nav > ul:after,
.rm-layout-expanded .rm-top-menu:before,
.rm-layout-expanded .rm-top-menu:after {
    content: " ";
    display: table;}
.rm-layout-expanded .rm-nav > ul:after,
.rm-layout-expanded .rm-top-menu:after {
    clear: both;}

/* No JS Styles ============================================================= */

/* Hide Sub Menus */
.no-js .rm-nav li ul,
.rm-nojs li ul,
.no-js .rm-nav .rm-menu-item .rm-menu,
.rm-nojs .rm-menu-item .rm-menu {
    position: absolute;
    left: -999em;}
.rm-toggle.rm-nojs {
    display: inline-block;
    visibility: hidden;}

/* Expanded layout if JS not supported */
/* Note: The min-width value here should match minWidth value set in JS */
@media screen and ( min-width: 750px ) {

    .rm-nojs > ul > li,
    .no-js .rm-nav > ul > li,
    .rm-nojs > .rm-menu > .rm-menu-item,
    .no-js .rm-nav > .rm-menu > .rm-menu-item {
        float: left;}

    .rm-nojs li a,
    .no-js .rm-nav li a,
    .rm-nojs .rm-menu-item a,
    .no-js .rm-nav .rm-menu-item a {
        padding-left: 1em;}

    /* clearfix */
    .rm-nojs > ul:before,
    .rm-nojs > ul:after,
    .no-js .rm-nav > ul:before,
    .no-js .rm-nav > ul:after,
    .rm-nojs > .rm-menu:before,
    .rm-nojs > .rm-menu:after,
    .no-js .rm-nav > .rm-menu:before,
    .no-js .rm-nav > .rm-menu:after{
        content: " ";
        display: table;}
    .rm-nojs > ul:after,
    .no-js .rm-nav > ul:after,
    .rm-nojs > .rm-menu:after,
    .no-js .rm-nav > .rm-menu:after {
        clear: both;}
    .rm-toggle.rm-nojs {
        display: none;}
}

/* Calculation Styles ============================================================
 * Applied and removed by jQuery during menu height calculations
 */

.rm-calculate {
    position: absolute !important;
    max-height: none !important;
    overflow: visible !important;}
.rm-layout-contracted .rm-calculate {
    width: 100% !important;}

/* Accessibility ============================================================ */

.rm-container .accessibly-hidden {
    position: absolute;
    left: -999em;}