.vertical-menu {
width: 80%;
}

.vertical-menu a {
background-color: #000000;
color: white;
display: block;
padding: 12px;
text-decoration: none;
font-family: arial;
}

.vertical-menu a:hover {
background-color: #000000;
}

.vertical-menu a.active {
background-color: #000000;
color: black;
font-family: arial;
}

<div class="vertical-menu">
  <a class="active"><strong>ADDITIONAL MENU</strong></a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/editorial">Editorial Team</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/Reviewer">Peer Review</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/fokus">Focus and Scope</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/guidlines">Author Guidlines</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/etika_">Publication Ethics</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/Submission">Online Submission</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/contact">Contact</a>
	<a href="http://jurnal.umus.ac.id/index.php/intech/indexing_2">Indexing</a>
</div>

.pkp_structure_head {
  background: #595959;
}
body {
  font-family: tahoma,geneva,sans-serif;
}
.obj_article_details .abstract {
    text-align: justify;
}
.pkp_footer_content {
  float: left;
  width: 50%;  padding-top: 10px;
  padding-bottom:10px;
}
.pkp_brand_footer {
  float: right;
  width: 30%;
  padding-bottom:10px;
  padding-top: 50px;
}
.pkp_structure_footer_wrapper {
	background: #e8ebef;
	border-bottom:@double solid; 
	border-bottom-color:#595959;
}
.pkp_site_name .is_img img {
	display: inline-block;
	max-height: 100px;
	max-width: 100%;
	width: auto;
	height: auto;
}