Wordpresss navbar spacing problems

    </div>
    <div class='col-sm-7 main-nav'>  
      <nav class="nav-collapse">
            <?php 
              $args = array(
                'menu'        => 'header-menu',
                'menu_class'  => '',
                'container'   => 'false'
              );
              wp_nav_menu( $args );
            ?>
      </nav>
    </div>
  </div>
</header>

@media (min-width: 768px) {
.static-nav{
  position:fixed
  top:0px;
  left:0px;
  height:60px;
  width:100%;
  margin:0;
  padding:0;
  z-index:999;
  overflow:hidden;
  background: #fff;
  color: #fff;
}
.main-nav{
  height: 100%;
}
.main-nav ul{
  float: right;
  width: auto;
}
.main-nav ul li{
  display: inline-block;
  width: auto;
  height: 100%;
  background: #333;
  margin: 0;
}
.main-nav ul li a{
  line-height: 60px;
  padding: 1em;
  color: #fff;
}

@media (max-width: 768px){
.container > .main-nav{
  margin: 0px;
  padding: 0px;
}
}