Vertical drop-down menu

/*** ESSENTIAL STYLES ***/
.sf-contener {
clear: both;
}
.sf-right {
  float: right;
  width: 7px;
}
.sf-menu, .sf-menu * {
margin: 0;
padding: 0;
list-style: none;
}
.sf-menu {
margin: 0 0;
padding:0;
width:100%;/* 980 */
}
.sf-menu ul {
position: absolute;
top: -999em;
width: 10em; /* left offset of submenus need to match (see below) */
text-align: left;
}
.sf-menu ul li {
width: 100%;
padding: 6px;
}
.sf-menu li:hover {
visibility: inherit; /* fixes IE7 'sticky bug' */
}
.sf-menu li {
float: left;
position: relative;
}
.sf-menu a {
display: block;
position: relative;
color:#fff;
text-shadow:0 1px 0 #333;
font-size: 18px;
}
.sf-menu li:hover ul,
.sf-menu li.sfHover ul {
left: 0;
top: 34px; /* match top ul list item height */
z-index: 99;
width:auto
}
ul.sf-menu li:hover li ul,
ul.sf-menu li.sfHover li ul {
top: -999em;
}
ul.sf-menu li li:hover ul,
ul.sf-menu li li.sfHover ul {
left: 250px; /* match ul width */
top: 0;
}
ul.sf-menu li li:hover li ul,
ul.sf-menu li li.sfHover li ul {
top: -999em;
}
ul.sf-menu li li li:hover ul,
ul.sf-menu li li li.sfHover ul {
left: 250px; /* match ul width */
top: 0;
}


/*** DEMO SKIN ***/
.sf-menu {
float: left;
margin-bottom: 1em;
}
.sf-menu a {
display:block;
margin-right:2px;
padding: 0 22px 0 20px;
line-height:34px;
border: 0;
text-decoration:none;
}
.sf-menu a, .sf-menu a:visited  { /* visited pseudo selector so IE6 applies text colour*/
color: #fff;
white-space:nowrap;
}
.sf-menu li li {
background: rgba(113, 113, 113, 0.9);
}
.sf-menu li li li {
background: rgba(113, 113, 113, 0.9);
}
.sf-menu a:focus, .sf-menu a:hover, .sf-menu a:active {
   background: #4E4E4E;
}
.sf-menu ul li:hover, .sf-menu ul li.sfHover,
.sf-menu ul li a:focus, .sf-menu ul li a:hover, .sf-menu ul li a:active {
background: #4e4e4e;
outline: 0;
}
/*** arrows **/
.sf-menu a.sf-with-ul {
min-width: 1px; /* trigger IE7 hasLayout so spans position accurately */
}
.sf-sub-indicator {
position: absolute;
display: block;
right: 10px;
top: 1.05em; /* IE6 only */
width: 10px;
height: 10px;
text-indent:  -999em;
overflow: hidden;
background: url('https://cdn3.iconfinder.com/data/icons/google-material-design-icons/48/ic_keyboard_arrow_down_48px-128.png') no-repeat -10px -100px; /* 8-bit indexed alpha png. IE6 gets solid image only */
}
a > .sf-sub-indicator {  /* give all except IE6 the correct values */
top: 11px;
background-position: 0 -100px; /* use translucent arrow for modern browsers*/
}
/* apply hovers to modern browsers */
a:focus > .sf-sub-indicator,
a:hover > .sf-sub-indicator,
a:active > .sf-sub-indicator,
li:hover > a > .sf-sub-indicator,
li.sfHover > a > .sf-sub-indicator {
background-position: -10px -100px; /* arrow hovers for modern browsers*/
}


/* point right for anchors in subs */
.sf-menu ul .sf-sub-indicator { background-position:  -10px 0; }
.sf-menu ul a > .sf-sub-indicator { background-position:  0 0; }
/* apply hovers to modern browsers */
.sf-menu ul a:focus > .sf-sub-indicator,
.sf-menu ul a:hover > .sf-sub-indicator,
.sf-menu ul a:active > .sf-sub-indicator,
.sf-menu ul li:hover > a > .sf-sub-indicator,
.sf-menu ul li.sfHover > a > .sf-sub-indicator {
background-position: -10px 0; /* arrow hovers for modern browsers*/
}


/*** shadows for all but IE6 ***/
.sf-shadow ul {
background: url('../img/shadow.png') no-repeat bottom right;
padding: 0 8px 9px 0;
-moz-border-bottom-left-radius: 17px;
-moz-border-top-right-radius: 17px;
-webkit-border-top-right-radius: 17px;
-webkit-border-bottom-left-radius: 17px;
}
.sf-shadow ul.sf-shadow-off {
background: transparent;
}
li.sf-search {
  background: inherit;
  float: right;
  line-height: 25px;
}
li.sf-search input {
  -moz-border-radius: 0 5px 5px 0;
  padding: 3px 0;
  padding-left: 20px;
  margin: 6px 6px 0 0;
  background: #fff url('../img/search.gif') no-repeat left center;
  border:1px solid #777
}


/* hack IE7 */
.sf-menu a, .sf-menu a:visited {height:34px !IE;}
.sf-menu li li {
width:250px;
background:#726f72 !IE;
}

 @media screen and (max-width: 479px) {
.sf-menu {
margin: 0 0;
padding:0;
width:100%;/* 980 */
}
.sf-menu ul {
position: absolute;
top: -999em;
width: 10em; /* left offset of submenus need to match (see below) */
text-align: left;
}
.sf-menu ul li {
width: 100%;
padding: 6px;
}
.sf-menu li:hover {
visibility: inherit; /* fixes IE7 'sticky bug' */
}
.sf-menu li {
display: block;
width: 100%;
text-align: left;
}
.sf-menu a {
display: block;
color:#fff;
text-shadow:0 1px 0 #333;
font-size: 18px;
}

@media screen and (min-width: 480px) and (max-width: 767px) {
    .sf-menu a{
        font-size: 14px;
    }
    .sf-menu li{
        font-size: 14px;
    }
}