Navbar Dark Ui

<div id="content">
  <a href='#' title='Title 1'>
      <span>
        <i data-feather="feather"></i>
      </span>
  </a>
  <a href='#' title='Title 2'>
    <span>
        <i data-feather="cpu"></i>
    </span>
  </a>
  <a href='#' title='Title 3'>
    <span>
      <i data-feather="sun"></i>
    </span>
  </a>
<a href='#' title='Title 4'>
    <span>
      <i data-feather="settings"></i>
    </span>
  </a>
  <a href='#' title='Title 5'>
    <span>
      <i data-feather="refresh-ccw"></i>
    </span>
  </a>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/feather-icons/4.7.3/feather.min.js"  ></script>

@import url(http://weloveiconfonts.com/api/?family=entypo);

*{
-webkit-font-smoothing:antialiased;
-webkit-box-sizing:border-box; 
-moz-box-sizing:border-box;
-ms-box-sizing:border-box;
box-sizing:border-box;
}

body,
html {
    padding: 0;
    height: 100%;
    overflow: hidden;
    background:#2f3437 url(http://lab.web-gate.fr/images/Noise-Fill.png);
}

body {
  transform: scale(1.2)
}
#content {
    position: relative;
    white-space: nowrap;
    min-height: 33px;
    width:260px;
    margin: 30px auto;
    top: 100px;
}
#content a {
   background-image: linear-gradient(#485258, #30383c);
    width: 66px;
    height: 38px;
    position: absolute;
    top: 0;
    text-decoration: none;
    padding-top: 9px;
    outline-width: 0px;
    z-index: 990;
    color: #eceff1;
    text-align: center;
    line-height: 1.2;
    display: block;
}
#content a:not(.active) {

    box-shadow:
    inset 0 1px 1px rgba(255,255,255, 0.1),
    inset 0 -1px 0px rgba(0,0,0, 0.2),
    0 9px 16px 0 rgba(0, 0, 0, 0.3),
    0 4px 3px 0 rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(0,0,0,.2);

    text-shadow: 0 0 21px rgba(223, 206, 228, 0.5), 0 -1px 0 #311d47;
}
#content a:not(.active):hover,
#content a:not(.active):focus {
    color: #86c6ef;
    text-shadow: 0 0 2px rgba(255,255,255,.2);
}
#content a:not(.active):active { 
  color: #86c6ef !important;
 background: #313335;
    text-shadow: 0 0 21px #618398, 0 0 15px  #618398, 0 0 2px  #fff, 0 0 1px  #000, 0 0 5px  #618398;
    color: #86c6ef;}
#content a.active,
#content a:active {
    box-shadow: 
    0 9px 16px 0 rgba(0, 0, 0, 0.1),
    0 0 0 1px rgba(0,0,0,.6), 
    0 2px 1px 0 rgba(255,255,255, 0.05), 
    inset 0 0 4px 3px rgba(0,0,0, 0.2), 
    inset 0 0 10px rgba(0,0,0,.5);
    background: #313335;
    text-shadow: 0 0 5px #618398,0 0 21px #618398, 0 0 15px  #618398, 0 0 2px  #fff, 0 0 1px  #000, 0 0 5px  #618398, 0 -1px 0 #fff, 0 1px 0 #000;
    color: #86c6ef;
}
#content a.active:before,
#content a:active:before {
    position: absolute;
  background: linear-gradient(to bottom, #485258 0%,#485258 15%,#86c6ef 50%,#86c6ef 50%,#86c6ef 51%,#30383c 85%,#30383c 100%); /* W3C */
    display: block;
    content: "";
    width: 1px;
    height: 36px;
    top: 1px;
    left: -2px;
    box-shadow:0px 0 0px rgba(134,199,239,.2),  0px 0 1px rgba(255,255,255,.2),0px 0 5px rgba(255,255,255,.4);
}
#content a.active:after,
#content a:active:after {
    position: absolute;
    display: block;
    content: "";
    width: 1px;
    height: 36px;
    top: 1px;
    right: -2px;
   background: linear-gradient(to bottom, #485258 0%,#485258 15%,#86c6ef 50%,#86c6ef 50%,#86c6ef 51%,#30383c 85%,#30383c 100%); /* W3C */
    box-shadow:0px 0 0px rgba(134,199,239,.2), 0px 0 1px rgba(255,255,255,.2),0px 0 5px rgba(255,255,255,.4);
}
#content a:last-child:active:after{box-shadow:0 0 0;background:transparent}
#content a:first-child:active:before{box-shadow:0 0 0;background:transparent}
#content a.active { z-index: 1000 }
#content a:active { z-index: 999 }
#content a:last-of-type {
    -webkit-border-radius: 0 7px 7px 0;
    -moz-border-radius: 0 7px 7px 0;
    -ms-border-radius: 0 7px 7px 0;
    -o-border-radius: 0 7px 7px 0;
    border-radius: 0 7px 7px 0;
}
#content a:first-of-type {
    -webkit-border-radius: 7px 0 0 7px;
    -moz-border-radius: 7px 0 0 7px;
    -ms-border-radius: 7px 0 0 7px;
    -o-border-radius: 7px 0 0 7px;
    border-radius: 7px 0 0 7px;
    left: 0;
}
#content a:nth-of-type(2) { left: 67px }
#content a:nth-of-type(3) { left: 134px }
#content a:nth-of-type(4) { left: 200px }
#content a:nth-of-type(5) { left: 267px }
#content a:nth-of-type(6) { left: 255px }
#content a:nth-of-type(7) { left: 306px }
#content a:nth-of-type(8) { left: 357px }
#content a i:before {
    margin-left: 2px;
    font-size: 22px;
}

a span svg {
  width: 18px;
  stroke-width: 1.5;
  margin-top: -2px;
}

feather.replace()