.sideNav {
   height: 100vh;
   width: 0;
   position: fixed;
   z-index: 100;
   top: 0;
   left: 0;
   background: rgba(0, 0, 0, 0.7);
   overflow-x: hidden;
   padding-top: 60px;
   transition: 0.5s;
   color:silver;
}


.sideNav a {
   /*padding: 8px 8px 8px 32px;*/
   text-decoration: none;
   font-size: 25px;
   color: #ffffff;
   font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   display: block;
   transition: 0.3s;   
}

.sideNav    a:link {color:white;}
.sideNav    a:visited {color:red;}
.sideNav    a:hover {color:blue;}
.sideNav    a:active {color:white;}



.centered {
  position: relative;
  height: 80vh;
  text-align: center;
  top: 50%;
  left: 50%;
  /* bring your own prefixes */
  transform: translate(-40%, -40%);
}

.sideNav .closeBtn {
   position: absolute;
   top: 0;
   right: 0px;
   font-size: 56px;
   width:60px;
   margin-left: 0px;
   border: 2px solid silver;
}

  @media screen and (max-width: 640px) {
   .sideNav a{font-size: .8em; text-align: center;}
   .centered {left:45%;}
  }
  
  .closeBtn:hover{transform: rotate(-90deg);}