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HTML 

              
                <div class="controller">
  <div class="top-button right"></div>
  <div class="top-button left"></div>
  <div class="controller-side dpad">
    <div class="controller-inner left">
      <div class="d-pad">
        <ul class="arrows">
          <li class="up"></li>
          <li class="right"></li>
          <li class="down"></li>
          <li class="left"></li>
        </ul>
        <div class="center">
        </div>
      </div>
    </div>
  </div>
  <div class="controller-center">
    <div class="button select"></div>
    <div class="button start"></div>
  </div>
  <div class="controller-side buttons">
    <div class="controller-inner right">
      <ul class="underlay">
      <div class="underlay-span xy"></div>
      <div class="underlay-span ab"></div>
        <li class="a"></li>
        <li class="b"></li>
        <li class="x"></li>
        <li class="y"></li>
      </ul>
      <ul class="overlay">
        <li class="a"></li>
        <li class="b"></li>
        <li class="x"></li>
        <li class="y"></li>
      </ul>
    </div>
  </div>
</div>

<aside>For a break-down of how I built this controller, check out the <a href="https://alexstandiford.com/articles/essays/a-breakdown-of-the-snes-controller-built-with-css-html" target="blank">related blog post</a></aside>
!

CSS 

              
                /*resets those pesky list items*/
ul,li,ol{
  padding:0px;
  margin:0px;
  list-style-type:none;
}

body{
background:#1e1300;
}

$controller-width:500px;

/* calculations */

$controller-side-diameter:$controller-width * .4;
$controller-side-radius:$controller-side-diameter/2;
$controller-center-height:$controller-side-diameter - $controller-side-radius/6;
$controller-center-width: $controller-width - $controller-side-diameter;
$controller-side-offset: $controller-side-diameter *.1;
$button-diameter: 27px;
/* colors */

$controller-body: #D1D1D1;
$controller-inner: #ACA9AC;
$d-pad: #717574;
$light-button: #B9B7E4;
$dark-button: #5D46AE;

/* mixins */

@mixin arrow($rotate, $left,$top) {
  transform:translate(-50%,-50%) rotate($rotate);
  left:$left;
  top:$top;
}

@mixin center($position){
  transform:translate(-50%,-50%);
  top:50%;
  left:50%;
  position:$position;
}

@mixin button($left, $top){
  left:$left;
  top:$top;
}

@mixin button-text($right,$top){
  position:absolute;
  right:$right;
  top:$top;
  font-family:sans-serif;
  color:$controller-body;
  font-style:italic;
  font-size:85%;
}

aside{
  display:none;
}

@media screen and (min-width:800px){
  aside{
    width:900px;
    max-width:100%;
    text-align:center;
    position:absolute;
    bottom:20px;
    left:50%;
    transform:translateX(-50%);
    color:$controller-body;
    font-family:sans-serif;
    font-size:110%;
    display:initial;
  }

  aside>a{
    color:$light-button;
    text-decoration:none;
  }
  
  aside>a:hover{
    color:$dark-button;
  }
}
/*---BODY---*/

.controller{
  width:$controller-width;
 @include center(fixed);
}

.controller-side:before{
  content:" ";
  display:block;
  width:$controller-side-diameter + 5px;
  height:$controller-side-diameter - 2px;
  position:absolute;
  top:1px;
  border-radius:100%;
}

.controller-side.dpad:before{
  left:3px;
  top:1px;
}

.controller-side.buttons:before{
  right:3px;
  top:1px;
}

.controller-side{
  width:$controller-side-diameter;
  height:$controller-side-diameter;
  border-radius:100%;
  float:left;
}

.controller-side.dpad{
  background:linear-gradient(180deg, #ddd 0%,#666 100%);
}

.controller-side.buttons{
  background: linear-gradient(225deg, #ddd 0%,#eee 25%,#666 75%);
}


.buttons{
  right:0%;
}

.controller-center{
  width:$controller-center-width;
  height:$controller-center-height;
  margin-left:$controller-side-radius * -1;
  margin-right:$controller-side-radius * -1;
}

.controller-center:after{
  content:" ";
  position:absolute;
  width:$controller-center-width;
  height:5px;
  background:linear-gradient(#666, #eee 10%,transparent 100%);
}

.controller-center:before{
  content:" ";
  position:absolute;
  height:2px;
  width:190px;
  background:linear-gradient(transparent,#666);
  bottom:17px;
  left:162px;
}

.controller-side:before, .controller-center{
  background:$controller-body;
  float:left;
}

/*---RIGHT SIDE---*/

.controller-inner.right{
  width:$controller-side-diameter - $controller-side-offset;
  height:$controller-side-diameter - $controller-side-offset;
  background:$controller-inner;
  top:$controller-side-offset/2;
  right:$controller-side-offset/2;
  border-radius:100%;
  border:1px solid #aaa;
  position:absolute;
}

.buttons ul{
  position:absolute;
  right:$controller-side-radius - 10px;
  top:$controller-side-radius - 10px;
  transform:translate(50%,-50%);
  width:$controller-side-diameter - $controller-side-offset - 50px;
  height:$controller-side-diameter - $controller-side-offset - 50px;
}

.buttons li{
  border:1px solid #333;
  display:block;
  height:$button-diameter;
  width:$button-diameter;
  border-radius:100%;
  position:absolute;
  transform:translate(-50%,-50%);
  left:50%;
  top:50%;
}

.buttons .underlay li{
  height:$button-diameter + 8px;
  width:$button-diameter + 8px;
  border:none;
  background:$controller-body;
  
}

.buttons .y,
.buttons .x{
  background:radial-gradient(farthest-corner at 10% 90%,#e1e1ef 0%, #cbcbed 30%,$light-button 50%, $light-button 70%,#e1e1ef 95%);
}

.buttons .a,
.buttons .b{
  background:radial-gradient(farthest-corner at 75% 0%, #dddaed 0%, #9f90dd 20%, $dark-button 50%, $dark-button 70%, #43337c 90%);
}

.buttons .a{
  @include button(80%,50%);
}

.buttons .overlay .a:after{
  content:"A";
}

.buttons .b{
  @include button(50%,75%);
}

.buttons .overlay .b:after{
  content:"B";
}

.buttons .x{
  @include button(50%,25%);
}

.buttons .overlay .x:after{
  content:"X";
}

.buttons .y{
  @include button(20%, 50%);
}

.buttons .overlay .y:after{
  content:"Y";
}

.buttons .y:after,
.buttons .b:after{
  @include button-text(115%, 90%);
}

.buttons .a:after,
.buttons .x:after{
  @include button-text(-60%, -35%);
}

.underlay-span{
  width:52px;
  height:$button-diameter + 8px;
  background:$controller-body;
  position:absolute;
}

.underlay-span.ab{
  right:16%;
  top:50%;
  transform:rotate(-40deg);
}

.underlay-span.xy{
  left:14%;
  top:25%;
  transform:rotate(-40deg);
}

/*---LEFT SIDE----*/

.controller-inner.left{
  width:$controller-side-diameter / 2;
  height:$controller-side-diameter / 2;
  background: linear-gradient(235deg, #aaa, #eee);
  border-radius:100%;
  margin-left:$controller-side-diameter / 4 - 3px;
  margin-top:$controller-side-diameter / 4 - 3px;
  position:absolute;
}

.controller-inner.left:after{
  content:" ";
  display:block;
  width:$controller-side-diameter / 2 - 3px;
  height:$controller-side-diameter / 2 - 3px;
  background:#333;
  margin-top:1px;
  margin-left:1px;
  border-radius:100%;
  background:$controller-body;
}

.d-pad{
  width:$controller-side-diameter / 2 - 40px;
  height:$controller-side-diameter / 2 - 40px;
  float:left;
  margin-left:$controller-side-diameter / 4 - 30px;
  margin-top:$controller-side-diameter / 4 - 30px;
}

.d-pad:after,
.d-pad:before{
  content:" ";
  display:block;
  height:$controller-side-diameter / 2 - 40px;
  width:15px;
  background:$d-pad;
  left:50%;
  border-radius:3px;
  border:2px solid #444;
  border-bottom:1px;
  transform:translateX(-50%);
  position:absolute;
}

.d-pad:before{
  transform:translateX(-50%) rotate(90deg);
}

.arrows{
  position:absolute;
  width:$controller-side-diameter / 2 - 40px;
  height:$controller-side-diameter / 2 - 40px;
  padding:0;
  margin:0;
}

.arrows li{
  list-style-type:none;
  margin:0;
  width:2px;
  height:0px;
  display:block;
  background:transparent;
  position:absolute;
  z-index:1;
  border-left:5px solid transparent;
  border-right:5px solid transparent;
  border-bottom:10px solid #555;
  border-radius:2px;
}

.arrows .right{
  @include arrow(90deg, 85%, 50%);
}

.arrows .left{
  @include arrow(270deg, 15%, 50%);
}

.arrows .up{
  @include arrow(0deg, 50%, 15%);
}

.arrows .down{
  @include arrow(180deg, 50%, 85%);
}
.center{
  width:19px;
  height:19px;
  @include center(absolute);
  background:$d-pad;
  z-index:1;
}

.center:after{
  @include center(absolute);
  width:15px;
  height:15px;
  background:radial-gradient(farthest-corner at 30% 70%, #888, #545454 70%);
  content:" ";
  border-radius:100%;
}

/*---CENTER------*/

.controller-center .button{
  width:39px;
  height:16px;
  display:block;
  background:linear-gradient(280deg, #555, #555 10%,#999 25%, #999 75%,#eee 90%);
  border-radius:10px;
  position:absolute;
}

.controller-center .button:before{
  width:35px;
  height:12px;
  display:block;
  background:linear-gradient(#444,$d-pad,#444);
  border-radius:10px;
  margin-top:2px;
  margin-left:2px;
  content:" ";
}

.button.select{
  @include arrow(-40deg, 42%, 60%);
}

.controller-center .button:after{
  font-family:sans-serif;
  font-style:italic;
  font-size:60%;
  transform:rotate(40deg);
  display:block;
  margin-top:15px;
  margin-left:-15px;
  color:$controller-inner;
}

.button.select:after{
  content:"SELECT";
}

.button.start:after{
  content:"START";
}

.button.start{
  @include arrow(-40deg, 52%, 60%);
}

/*---R AND L BUTTONS---*/

.top-button{
  width:100px;
  height:100px;
  display:block;
  position:absolute;
  top:-5px;
  z-index:-1;
}

.top-button.right:before,
.top-button.left:before{
  content:" ";
  width:60%;
  height:100%;
  display:block;
  position:absolute;
  border-radius:3px;
}

.top-button.right:after,
.top-button.left:after{
  content:" ";
  display:block;
  height:$controller-side-diameter + 5px;
  width:$controller-side-diameter + 5px;
  position:absolute;
}

.top-button.right:before{
  right:0;
  background:linear-gradient(90deg,$controller-body 0%, $controller-body 90%,#666 100%);
}

.top-button.right{
  left:50px;
}

.top-button.right:after{
  background:linear-gradient(235deg,$controller-body 0%, $controller-body 47%,#666 50%,#666 50%,transparent 50%);
  border-radius:100%;
  left:$controller-side-radius * -1 + 45px;
}

.top-button.left:before{
  left:0;
  background:linear-gradient(90deg, #666 0%, $controller-body 10%,$controller-body 100%);
}

.top-button.left{
  right:50px;
}

.top-button.left:after{
  background:linear-gradient(-235deg,$controller-body 0%, $controller-body 47%,#666 50%,#666 50%,transparent 50%);
  border-radius:100%;
  right:$controller-side-radius * -1 + 47px;
}
!

JS 

              
                /**/
!
999px

Console