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HTML 

              
                <!-- Code to handle the camera angle -->
<input tabindex="-1" type="radio" name="cam" id="cam1" />
<input tabindex="-1" type="radio" name="cam" id="cam2" />
<input tabindex="-1" type="radio" name="cam" id="cam3" />
<input tabindex="-1" type="radio" name="cam" id="cam4" />
<input tabindex="-1" type="radio" name="cam" id="cam5" />
<input tabindex="-1" type="radio" name="cam" id="cam6" checked />
<input tabindex="-1" type="radio" name="cam" id="cam7" />
<input tabindex="-1" type="radio" name="cam" id="cam8" />
<input tabindex="-1" type="radio" name="cam" id="cam9" />

<div id="camera">
  <label for="cam1"></label>
  <label for="cam2"></label>
  <label for="cam3"></label>
  <label for="cam4"></label>
  <label for="cam5"></label>
  <label for="cam6"></label>
  <label for="cam7"></label>
  <label for="cam8"></label>
  <label for="cam9"></label>
</div>


<article id="snes-gamepad" aria-label="SNES controller">
  <!-- cord -->
  <div id="cord"><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></div>
  
  <!-- Buttons on top-->
  <button id="l" class="is3d">Top left<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></button>
  <button id="r" class="is3d">Top Right<div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></button>
  
  <!-- frame -->
  <div class="face is3d"><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></div>
  
  <!-- Letters and Text -->
  <h1>SUPER NINTENDO</h1>
  <p>CSS ENTERTAINMENT SYSTEM</p>
  
  <p class="letter letter-x" aria-hidden="true">X</p>
  <p class="letter letter-y" aria-hidden="true">Y</p>
  <p class="letter letter-a" aria-hidden="true">A</p>
  <p class="letter letter-b" aria-hidden="true">B</p>
  <p class="letter-start" aria-hidden="true">START</p>
  <p class="letter-select" aria-hidden="true">SELECT</p>
  
  <!-- directional buttons + axis -->
  <button id="up">Up</button>
  <button id="left">Left</button>
  <button id="right">Right</button>
  <button id="down">Down</button>
  <div class="axis is3d"><div style="--z:1"></div><div style="--z:2"></div><div style="--z:3"></div><div style="--z:4"></div><div style="--z:5"></div><div style="--z:6"></div></div>
  
  <!-- Menu buttons (start/select) -->
  <button id="select" class="is3d">Select<div style="--z:1"></div><div style="--z:2"></div><div style="--z:3"></div><div style="--z:4"></div></button>
  <button id="start" class="is3d">Start<div style="--z:1"></div><div style="--z:2"></div><div style="--z:3"></div><div style="--z:4"></div></button>
  
  <!-- Action buttons -->
  <div class="buttons">
    <button id="x" class="circle is3d">x<div></div><div></div><div></div><div></div></button>
    <button id="y" class="circle is3d">y<div></div><div></div><div></div><div></div></button>
    <button id="a" class="circle is3d">a<div></div><div></div><div></div><div></div></button>
    <button id="b" class="circle is3d">b<div></div><div></div><div></div><div></div></button>
  </div>
</article>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Teko&display=swap');

body {
  --angle: 35deg;
  margin: 0;
  height: 100vh;
  perspective: 1500px;
  overflow: hidden;
  font-family: Teko, Helvetica, Arial, sans-serif;
  font-size: 3vmin;
}

*:focus {
  outline: 0.25vmin dashed red;
  outline-offset: 0.5vmin;
}

/* Camera angle */
input[type="radio"] {
  position: absolute;
  left: -1000in;
}

#cam1:checked ~ #snes-gamepad { --x: -1; --y: 1; }
#cam2:checked ~ #snes-gamepad { --x: -1; }
#cam3:checked ~ #snes-gamepad { --x: -1; --y: -1; }
#cam4:checked ~ #snes-gamepad { --y: 1; }
#cam6:checked ~ #snes-gamepad { --y: -1; }
#cam7:checked ~ #snes-gamepad { --x: 1; --y: 1; }
#cam8:checked ~ #snes-gamepad { --x: 1; }
#cam9:checked ~ #snes-gamepad { --x: 1; --y: -1; }

#cam1:checked ~ #camera label:nth-child(1),
#cam2:checked ~ #camera label:nth-child(2),
#cam3:checked ~ #camera label:nth-child(3),
#cam4:checked ~ #camera label:nth-child(4),
#cam5:checked ~ #camera label:nth-child(5),
#cam6:checked ~ #camera label:nth-child(6),
#cam7:checked ~ #camera label:nth-child(7),
#cam8:checked ~ #camera label:nth-child(8),
#cam9:checked ~ #camera label:nth-child(9) { 
  background: #f004; 
  mix-blend-mode: color-burn;
}

#camera {
  --color1: #ccc;
  position: absolute;
  top: 2vmin;
  right: 2vmin;
  width: 10vmin;
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  background:
    linear-gradient(#0000 0 30%, #fff 0 36.66%, #0000 0 63.33%, #fff 0 70%, #0000 0),
    linear-gradient(90deg, #0000 0 30%, #fff 0 36.66%, #0000 0 63.33%, #fff 0 70%, #0000 0),
    radial-gradient(closest-side, #ccc 33.33%, #0000 0 40%, #ccc 0 99.99%, #0000 0)
    
    ;
  border-radius: 50%;
  overflow: hidden;
  gap: 0.125vmin;
}

/* Gamepad code */
#snes-gamepad {
  --x: 0;
  --y: 0;
  --pos: 0.2vmin;
  --rotate: rotate3d(var(--x), var(--y), 0, var(--angle));
  --gray-light: #ccc;
  --gray: #b5b5bb;
  --gray-dark: #585a58;
  --purple-light: #bbe;
  --purple-dark: #64b;
  --button-x: #3c62f8; var(--purple-light);
  --button-y: #14b161; var(--purple-light);
  --button-a: #f03025; var(--purple-dark);
  --button-b: #e9dd34; var(--purple-dark);
  position: absolute;
  width: 80vmin;
  height: 34vmin;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) var(--rotate);
  transform-style: preserve-3d;
  transition: transform 1s;
}

#snes-gamepad * {
  position: absolute;
  box-sizing: border-box;
  transform-style: preserve-3d;
}

.is3d > div {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.is3d > div:nth-child(1) { transform: translateZ(calc(var(--pos) * 1)); }
.is3d > div:nth-child(2) { transform: translateZ(calc(var(--pos) * 2)); }
.is3d > div:nth-child(3) { transform: translateZ(calc(var(--pos) * 3)); }
.is3d > div:nth-child(4) { transform: translateZ(calc(var(--pos) * 4)); }
.is3d > div:nth-child(5) { transform: translateZ(calc(var(--pos) * 5)); }
.is3d > div:nth-child(6) { transform: translateZ(calc(var(--pos) * 6)); }
.is3d > div:nth-child(7) { transform: translateZ(calc(var(--pos) * 7)); }
.is3d > div:nth-child(8) { transform: translateZ(calc(var(--pos) * 8)); }
.is3d > div:nth-child(9) { transform: translateZ(calc(var(--pos) * 9)); }
.is3d > div:nth-child(10) { transform: translateZ(calc(var(--pos) * 10)); }
.is3d > div:nth-child(11) { transform: translateZ(calc(var(--pos) * 11)); }
.is3d > div:nth-child(12) { transform: translateZ(calc(var(--pos) * 12)); }

button {
  border: 0;
  color: transparent;
  background: transparent;
  padding: 0;
  transform-style: preserve-3d;
}

button.active, /* gamepad controlled */
button:active {
  --pos: 0.05;
}


/* general frame */
.face,
.face div {
  --pos: -0.7vmin;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    /* buttons circle */
    radial-gradient(closest-side, #0000 97%, #fff2 99%, #0000 0) 48vmin 2vmin / 30vmin 30vmin no-repeat,
    radial-gradient(closest-side, var(--gray) 99%, #0002 99.8%, #0000 100%) 48vmin 2vmin / 30vmin 30vmin no-repeat,
    /* axis circle */
    radial-gradient(farthest-side at 100% 50%, #0000 94%, #00000002 99.9%, #0000 0) 7.5vmin 7.5vmin / 9.5vmin 19vmin no-repeat,
    radial-gradient(farthest-side at 1vmin 50%, #0000 96%, #ffffff1f 99.9%, #0000 0) 16vmin 7.5vmin / 10.5vmin 19vmin no-repeat,
    radial-gradient(farthest-side, #0000 80%, #00000004 99.9%, #0000 0) 7.5vmin 7.5vmin / 19vmin 19vmin no-repeat,
    /* general shape */
    radial-gradient(circle at 17vmin 17vmin, var(--gray-light) 16.95vmin, #0000 17vmin),
    radial-gradient(circle at 63vmin 17vmin, var(--gray-light) 16.95vmin, #0000 17vmin),
    linear-gradient(#0000, #fff2 0.01%, #0000 2% 98%, #0001) 50% 0 / 46vmin 30vmin no-repeat,
    linear-gradient(var(--gray-light) 0 0) 50% 0 / 46vmin 30vmin no-repeat;
  pointer-events: none;
}

.face div {
  filter: contrast(0.9);
  background: 
    radial-gradient(circle at 17vmin 17vmin, var(--gray-light) 16.9vmin, #0000 17vmin),
    radial-gradient(circle at 63vmin 17vmin, var(--gray-light) 16.9vmin, #0000 17vmin),
    linear-gradient(var(--gray-light) 0 0) 50% 0 / 46vmin 30vmin no-repeat;
}

/* Text (all) */
h1 {
  top: 3.5vmin;
  left: 45%;
  margin: 0;
  transform: translate(-50%, 0%);
  font-size: 4vmin;
  font-style: italic;
  color: var(--gray-dark);
  font-weight: 300;
}

h1 + p {
  background: var(--gray-dark);
  color: var(--gray-light);
  margin: 0;
  padding: 0vmin 0.75vmin;
  line-height: 3vmin;
  height: 2.5vmin;
  font-style: italic;
  font-size: 1.66vmin;
  top: 8vmin;
  left: 45.25%;
  transform: translate(-50%, 0);
  letter-spacing: 0.2vmin;
}

.letter {
  color: var(--gray-light);
  font-style: italic;
  font-size: 3.75vmin;
  transform: skew(3deg);
  line-height: 0;
}

.letter-a { top: 28%; left: 92.9%; }
.letter-b { top: 69%; left: 71.25%; }
.letter-x { top: 11%; left: 83.5%; }
.letter-y { top: 52%; left: 62%; }

/* Top buttons */
#l, #r {
  --pos: -0.2vmin;
  width: 17.25vmin;
  height: 5vmin;
  top: -1.5vmin;
  left: 8.75vmin;
  background: 
    linear-gradient(#fff0, #fff6),
    var(--gray-light);
  border-radius: 55% 1vmin 0 0;
  box-shadow: 
    inset 0 0.125vmin 0.25vmin #0002,
    inset 0 2.5vmin 0.5vmin -1vmin var(--gray-light),
    inset 0 3vmin 1vmin -1vmin #0004;
  transform: translateZ(-2.75vmin);
}

#l div,
#r div {
  box-shadow: 
    inset 0 0.125vmin 0.25vmin #0002,
    inset 0 2.5vmin 0.5vmin -1vmin var(--gray-light),
    inset 0 3vmin 1vmin -1vmin #0004;
  border-radius: 55% 1vmin 0 0;
}

#l.active, /* gamepad js */
#l:active {
  box-shadow: 
    inset 0 0.125vmin 0.25vmin #0002,
    inset 0 2.5vmin 0.75vmin -1.66vmin var(--gray-light),
    inset 0 3vmin 1vmin -1vmin #0004;
  transform: translateZ(-2.75vmin) translateY(1vmin);
}

#r {
  top: -1.5vmin;
  left: auto;
  right: 8.75vmin;
  transform: scaleX(-1) translateZ(-2.75vmin);
}

#r.active, /* gamepad js */
#r:active {
  box-shadow: 
    inset 0 0.125vmin 0.25vmin #0002,
    inset 0 2.5vmin 0.75vmin -1.66vmin var(--gray-light),
    inset 0 3vmin 1vmin -1vmin #0004;
  transform: scaleX(-1)  translateZ(-2.75vmin) translateY(1vmin);
}

/* axis */
.axis, .axis div {
  --color: #111;
  background: 
    linear-gradient(#0000 31%, #000c 33.33% 66.66%, #0000 70%),
    linear-gradient(90deg, #0000 31%, #000c 33.33% 66.66%, #0000 70%)
    ;
  width: 13.5vmin;
  aspect-ratio: 1;
  top: 9.75vmin;
  left: 10.5vmin;
  pointer-events: none;
  box-shadow: 
    -4.5vmin 0 0.25vmin -4.4vmin #000c,
    4.5vmin 0 0.25vmin -4.4vmin #000c,
    0 -4.5vmin 0.25vmin -4.4vmin #000c,
    0 4.5vmin 0.25vmin -4.4vmin #000c
}

.axis div {
  --color: #34393a; #333;
  --shadows: 
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 36.66% 0% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 62.66% 0% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 36.66% 100% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 62.66% 100% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 0 36.66% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 0 62.66% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 100% 36.66% / 10% 10% no-repeat,
    radial-gradient(closest-side, var(--color) 93%, #0000 99.9%) 100% 62.66% / 10% 10% no-repeat,
    linear-gradient(var(--color) 0 0) 50% 50% / 100% 26.66% no-repeat,
    linear-gradient(var(--color) 0 0) 50% 50% / 26.66% 100% no-repeat,
    linear-gradient(var(--color) 0 0) 50% 50% / 93.33% 33.33% no-repeat,
    linear-gradient(var(--color) 0 0) 50% 50% / 33.33% 93.33% no-repeat;
  top: 0;
  left: 0;
  box-shadow: none;
  background: 
    var(--shadows)
    ;
}

.axis div:last-of-type {
  --color: #3a4448;#3a3a3a;
  background:
    linear-gradient(#fff1, #fff0 20% 80%, #fff1),
    linear-gradient(90deg, #fff1, #fff0 20% 80%, #fff1),
    var(--shadows)
    ;
/*   width: 13.5vmin; */
  box-shadow: 
    inset 0 0 2vmin -0.5vmin #0009,
    inset -4.5vmin -4.5vmin 3vmin #2102,
    inset 4.5vmin 4.5vmin 3vmin #ffff0005
    ;
  clip-path: polygon(33.33% 0, 66.66% 0, 66.66% 33.33%, 100% 33.33%, 100% 66.66%, 66.66% 66.66%, 66.66% 100%, 33.33% 100%, 33.33% 66.66%, 0 66.66%, 0 33.33%, 33.33% 33.33%);
  -webkit-mask: var(--shadows);
  mask: var(--shadows)
}

.axis div:last-of-type::before {
  content: "";
  position: absolute;
  width: 25%;
  aspect-ratio: 1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: 
    radial-gradient(#0000, #0002);
  box-shadow:
/*     inset 1vmin 1vmin 1vmin -0.5vmin #0002, */
    inset -0.25vmin 0 0.5vmin #28282855,
    inset 0 0 1vmin 0.25vmin #28282855,
    inset -1vmin -0.25vmin 0.5vmin -0.25vmin #ffffff11
    ;
  border-radius: 50%;
  opacity: 0.9;
}

#up, #right, #left, #down {
  width: 4.5vmin;
  height: 4.5vmin;
}

#up { top: 9.75vmin; left: 15vmin; }
#left { top: 14.25vmin; left: 10.5vmin; }
#right { top: 14.25vmin; left: 19.5vmin; }
#down { top: 18.75vmin; left: 15vmin; }

#up.active ~ .axis div, /* gamepad js */
#up:active ~ .axis div { 
  transform-origin: 50% 100%;
  transform: translateZ(calc(var(--pos) * var(--z))) rotateX(5deg); 
}

#down.active ~ .axis div, /* gamepad js */
#down:active ~ .axis div{ 
  transform-origin: 50% 0%;
  transform:  translateZ(calc(var(--pos) * var(--z))) rotateX(-5deg); 
}

#left.active ~ .axis div, /* gamepad js */
#left:active ~ .axis div{ 
  transform-origin: 100% 50%;
  transform:  translateZ(calc(var(--pos) * var(--z))) rotateY(-5deg); 
}

#right.active ~ .axis div, /* gamepad js */
#right:active ~ .axis div{ 
  transform-origin: 0% 50%;
  transform:  translateZ(calc(var(--pos) * var(--z))) rotateY(5deg); 
}

/* Menu buttons */
#select,
#start {
  width: 6vmin;
  height: 2vmin;
  border-radius: 2.5vmin;
  background: #444;
  transform: translate(-50%, -50%) rotate(-35deg);
  top: 19.5vmin;
  left: 32.5vmin;
  box-shadow: 
    0 0 0 0.2vmin #0007, 
/*     0 0 0.3vmin 0.1vmin #0008, */
    0 0 0.3vmin 0.1vmin #fff4,
    0 0 0 0.2vmin #0002,
    0 0.5vmin 0.5vmin #0004;
}

#start {
  left: 41vmin;
}

button#start.is3d div,
button#select.is3d div {
  --color: #222;
  top 0;
  left: 0
  width: 100%;
  height: 100%;
  transform: translateZ(calc(var(--pos) * var(--z))) scale(calc(1 - var(--z) * 0.03));
  border-radius: 2.5vmin;
  background: #444;
  box-shadow: 
    inset 0 0 0.5vmin var(--color),
    inset 2.25vmin 2.25vmin 0.5vmin -2.25vmin #fff2,
    inset -2.25vmin -0.5vmin 1vmin -2.25vmin #fff2,
    inset -2.25vmin -0.5vmin 1.5vmin #fff1,
    inset 0.5vmin 1vmin 0.5vmin #0002,
    inset 1vmin 0vmin 0.5vmin #0002,
    inset -1.5vmin -1vmin 2vmin -0.5vmin #2583,
    inset -1vmin -0.5vmin 0.5vmin #fff3
}

#start div {
  box-shadow: 
    inset 0 0 0.5vmin var(--color),
    inset 2.25vmin 2.25vmin 0.5vmin -2.25vmin #fff2,
    inset 0.5vmin 1vmin 0.5vmin #0002,
    inset 1vmin 0vmin 0.5vmin #0002,
    inset -1.5vmin -1vmin 2vmin -0.5vmin #2583,
    inset -1vmin -0.5vmin 0.5vmin #fff3
}

#start:active div,
#select:active div {
  transform: translateZ(calc(var(--pos) * var(--z))) scale(calc(1 - var(--z) * 0.03));
}

.letter-start,
.letter-select {
  color: var(--gray);
  font-size: 2vmin;
  transform: translate(-50%, 0);
  filter: brightness(0.8);
  top: 60%;
  font-style: italic;
  letter-spacing: 0.15vmin;
}

.letter-start { left: 41vmin; }
.letter-select { left: 32.5vmin; }


/* Action buttons */
button.circle,
button.circle div {
  --shadow:
    inset 0 0 0 0.25vmin var(--color),
    inset 2.25vmin 2.25vmin 0.5vmin -2.25vmin #fff8,
    inset -2.25vmin -0.5vmin 1vmin -2.25vmin #fff8,
    inset -2.25vmin -0.5vmin 1.5vmin #fff2,
    inset 0.5vmin 1vmin 0.5vmin #0001,
    inset 1vmin 0vmin 0.5vmin #0001,
    inset -1.5vmin -1vmin 2vmin -0.5vmin #2583,
    inset -1vmin -0.5vmin 0.5vmin #fff3
    ;
  width: 6vmin;
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--color);
  z-index: 2;
  box-shadow: 
    0 0 0 0.25vmin #0002, 
    0 0 0.3vmin 0.1vmin #0008,
    0 0 0.3vmin 0.1vmin #fff4,
    0 0 0 0.2vmin #0002,
    var(--shadow);
}

button.circle div {
  box-shadow: 
    0 0 0 0.25vmin #0002, 
    0 0 0.3vmin 0.1vmin #fff4,
    0 0 0 0.2vmin #0001,
    var(--shadow);
}

#x {
  top: 9vmin;
  left: 14.75vmin;
  --color: var(--button-x);
}

#y {
  top: 15vmin;
  left: 7.125vmin;
  --color: var(--button-y);
}

#a {
  top: 15vmin;
  right: 1.5vmin;
  --color: var(--button-a);
}

#b {
  top: 21vmin;
  left: 14.75vmin;
  --color: var(--button-b);
}

.buttons {
  width: 30vmin;
  height: 30vmin;
  border-radius: 50%;
  right: 2vmin;
  top: 2vmin;
  box-shadow: 
    0vmin 0vmin 1vmin 1.4vmin var(--gray-light),
    1.25vmin 1vmin 1vmin 0vmin #fffc,
    1.25vmin -1vmin 1vmin 0vmin #fffa;
  border: 1px solid #0001;
}

.buttons::before,
.buttons::after {
  content: "";
  position: absolute;
  border-radius: 10vmin;
  transform: rotate(-38deg);
  width: 17.75vmin;
  height: 7.75vmin;
  background: var(--gray-light);
  z-index: 1;
  top: 8.1vmin;
  left: 2.05vmin;
  box-shadow: 
    inset 0 0 0 0.125vmin #0003,
    inset 0 0 0 0.25vmin #fff2
}

.buttons::after {
  top: 14.05vmin;
  left: 9.75vmin;
}

/* cord */
#cord {
  width: 2vmin;
  aspect-ratio: 1;
  background: var(--gray-dark);
  border-radius: 50%;
  left: 50%;
  top: 0;
  transform-origin: 50% 0%;
  transform: translate(-50%, 0) rotateX(-90deg) translate(0, 3vmin);
  box-shadow: 
    0 0 1vmin 0.2vmin #000c,
    0 0 0 1.5vmin var(--gray-light)
    ;
  outline: 0.0625vmin solid #0001;
  outline-offset: 1.5vmin;
}

#cord div {
  width: 100%;
  height: 600%;
  background: linear-gradient(#585a58, #585a5888 20%, #585a5800);
  top: 50%;
  transform-origin: 50% 0%;
  transform: rotateX(-90deg);
}

#cord div:nth-child(1) { transform: rotateX(-90deg) rotateY(calc(1 * 36deg)); }
#cord div:nth-child(2) { transform: rotateX(-90deg) rotateY(calc(2 * 36deg)); }
#cord div:nth-child(3) { transform: rotateX(-90deg) rotateY(calc(3 * 36deg)); }
#cord div:nth-child(4) { transform: rotateX(-90deg) rotateY(calc(4 * 36deg)); }
#cord div:nth-child(5) { transform: rotateX(-90deg) rotateY(calc(5 * 36deg)); }
#cord div:nth-child(6) { transform: rotateX(-90deg) rotateY(calc(6 * 36deg)); }
#cord div:nth-child(7) { transform: rotateX(-90deg) rotateY(calc(7 * 36deg)); }
#cord div:nth-child(8) { transform: rotateX(-90deg) rotateY(calc(8 * 36deg)); }
#cord div:nth-child(9) { transform: rotateX(-90deg) rotateY(calc(9 * 36deg)); }
#cord div:nth-child(10) { transform: rotateX(-90deg) rotateY(calc(10 * 36deg)); }
!

JS 

              
                import gamecontrollerJs from "https://cdn.skypack.dev/gamecontroller.js@1.5.0";

function toggleClass(el, val) {
  document.getElementById(el).classList.toggle("active", val)
}

gameControl.on('connect', function(gamepad) {
  const buttonMap = {
    "button0": "b",
    "button1": "a",
    "button2": "y",
    "button3": "x",
    "button4": "l",
    "button5": "r",
    "button8": "select",
    "button9": "start"
  };
  
  for (const property in buttonMap) {
    gamepad.on(property, function() { toggleClass(buttonMap[property], true) })
           .after(property, function() { toggleClass(buttonMap[property], false) });
  }
});
!
999px

Console