whmcsSwitchAddon/includes/header.php

<div class="add_hdr">                 
    <div class="add_nav" id="addontabs">        
        <ul>                
            <li <?php if(!isset($_GET['action'])){ ?> class="active"<?php } ?>><a href="addonmodules.php?module=wgs_switchepp" class="selectedtab" style="line-height: normal;"><i class="fa fa-arrow-circle-down"></i> Get Poll</a></li>      
            <li <?php if(isset($_GET['action']) && $_GET['action']=='domainlist'){ ?> class="active"<?php } ?>><a href="addonmodules.php?module=wgs_switchepp&action=domainlist" style="line-height: normal;"><i class="fa fa-file-o"></i> Domains List</a></li>            
            
        </ul>                
    </div>            
</div>  

<style>
.add_nav ul li.active a {
    color: #fff;
    background-color: #3c8dbc;
    border-radius: 4px;
}
.add_nav{
    margin:0px;
    padding:0px;
     
}
.add_nav ul {
    margin: 0px;
    padding: 0px 15px;
}
.add_nav ul li{
    margin:0px;
    padding:0px;
    float:left;
    line-height:52px;
    list-style:none;
}
.add_nav ul li a {
    color: #000;
    display: block;    
    font-size: 14px;
    margin: 0;
    padding: 10px 20px;
    text-decoration: none;
}
.add_hdr {
    background: #fff;
    margin: 0px;
    padding: 8px 0px;
    width: 100%;
    height: auto;
    box-shadow: 3px 1px 10px #00000024;
    border-radius: 3px;
    align-items: center;
    display: flex;
    justify-content: space-between;
}
.poll_cont {
    margin-top: 55px;
}
.csv_file_upload {
    margin-top: 25px;
    min-height: 155px;
    /* position: relative;
    width: 30%; */
    /* top: 50%; */
    /* left: 30%; */
    background: #fff;
    padding: 18px 64px;
    box-shadow: 3px 1px 10px #00000024;
}
.list_domain {
    margin-top: 85px;
}
table#csvdomains thead {
    background: #3c8dbc;
    color: #fff;
}

 #csvdomains tr.even {
    background: #ecf5fb;
} 
div#csvdomains_wrapper {
    /* background: #fff; */
    box-shadow: 3px 1px 10px #00000024;
    padding: 20px;
    margin-bottom: 30px;
}
.content-wrapper{
    /* float: left; */
    background-color: #ffffff;
}
footer.main-footer {
    border: none;
}
</style>