.nav_menu
{
  overflow:hidden;
  height:100vh;
  z-index:10000000000;
  position:absolute;
  top:0;
  right: 0;
  background: #1d1d1d;
  visibility: hidden;
  opacity: 0;
}
.nav_menu:target 
{
  visibility: visible;
  opacity: 1;
}
#full_page_menu ul 
{
padding:0;
margin:50px auto;
}
#full_page_menu ul li
{
display:block;
list-style:none;
padding:20px;
border-bottom:1px sollid #ddd;
text-align:center;
}
#full_page_menu ul li a
{
color:#fff;
font-size:24px;
font-family:OpenSans;
font-weight:bold;
text-align:center;
text-decoration:none;
}
#full_page_menu ul li a:hover
{
color:#fdbc00;
}
#full_page_menu  .close_button a
{
cursor:pointer;
color:#fff;
font-size:35px;
font-family:OpenSans;
font-weight:bold;
text-align:center;
text-decoration:none;
background-color:#fdbc00;
padding-top:10px;
padding-left:20px;
padding-right:20px;
padding-bottom:15px;
}
#full_page_menu  .close_button
{
padding-top:0px;
padding-left:20px;
padding-right:20px;
padding-bottom:0px;
}