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HTML 

              
                <div class="canvas" role="img" aria-label="Cartoon of an elf wearing a Christmas suit and a hat with a bell">
  <div class="shadow"></div>
  <div class="leg"></div>
  <div class="leg"></div>
  <div class="boot"></div>
  <div class="boot"></div>
  <div class="boot-top"></div>
  <div class="boot-top"></div>
  <div class="vest"></div>
  <div class="arm-left"></div>
  <div class="arm-right"></div>
  <div class="body"></div>
  <div class="collar"></div>
  <div class="belt"></div>
  <div class="hand"></div>
  <div class="hand"></div>
  <div class="neck"></div>
  <div class="ear"></div>
  <div class="ear"></div>
  <div class="head">
    <div class="mouth"></div>
    <div class="eye"></div>
    <div class="eye"></div>
    <div class="cheek"></div>
    <div class="cheek"></div>
    <div class="nose"></div>
  </div>
  <div class="hat-top"></div>
  <div class="hat"></div>
  <div class="bell"></div> 
</div>

<a id="youtube" href="https://www.youtube.com/watch?v=zYY1hfDEFZk" target="_blank">
  <span>See how this demo was coded</span>
</a>
!

CSS 

              
                body {
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
  background: linear-gradient(#8bea, #9cfa calc(50% + 33vmin), #eee 0, #fff);
}

.canvas {
  --red: #c00;
  --white: #eee;
  --green: #090;
  --green-dark: #080;
  --green-darker: #070;
  --skin: #fca;
  --skin-dark: #fb9;
  --skin-darker: #ea8;
  width: 80vmin;
  height: 80vmin;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.canvas div,
.canvas div::before,
.canvas div::after {
  position: absolute;
  display: block;
  box-sizing: border-box;
}

.leg {
  bottom: 0;
  left: 42%;
  width: 20%;
  height: 30%;
  border-radius: 30% / 100%;
  background:
    radial-gradient(farthest-side at 100% 30%, #000, #0000),
    radial-gradient(farthest-side at 100% 70%, #000, #0000),
    repeating-radial-gradient(circle at 50% -40%, var(--red) 0 8%, var(--white) 0 16%)
    ;
  background-color: #f008;
  -webkit-mask:
    radial-gradient(100% 150% at 60% 55%, #0000 50%, #000 51%);
  mask:
    radial-gradient(100% 150% at 60% 55%, #0000 50%, #000 51%)
}

.leg + .leg {
  left: 38%;
  transform: scaleX(-1);
  border-radius: 35% / 100%;
  -webkit-mask:
    radial-gradient(100% 150% at 60% 55%, #0000 49%, #000 50%);
  mask:
    radial-gradient(100% 150% at 60% 55%, #0000 49%, #000 50%)
}

.boot {
  width: 15%;
  height: 3%;
  bottom: 0;
  left: 31%;
  border-radius: 50% 100% 100% 100% / 10% 20% 0 10vmin;
  background: var(--green);
  -webkit-mask:
    radial-gradient(100% 50% at 100% 0%, #0000 98%, #000 100%);
  mask:
    radial-gradient(100% 50% at 100% 0%, #0000 98%, #000 100%);
}

.boot + .boot {
  transform: scaleX(-1);
  left: 54%;
}

.boot-top {
  width: 5%;
  height: 2%;
  background: var(--green-darker);
  border-radius: 5vmin;
  bottom: 1.25%;
  left: 41.5%;
  transform: rotate(2deg);
}

.boot-top + .boot-top {
  left: 53.5%;
  transform: rotate(-4deg);
}

.vest {
  width: 18.5%;
  background: var(--green);
  background: linear-gradient(var(--green-dark), var(--green));
  top: 65%;
  left: 50%;
  transform: translateX(-50%);
/*   height: 15%;
  border-radius: 30% 30% 20% 20% / 120% 120% 100% 100%;
  clip-path: polygon(0 0, 100% 0%, 100% 100%, 80% 70%, 65% 100%, 50% 75%, 40% 100%, 25% 69%, 0% 100%); */
  height: 13%;
/*   clip-path: polygon(12% 0, 88% 0%, 100% 100%, 80% 70%, 65% 100%, 50% 75%, 40% 100%, 25% 69%, 0% 100%); */
  clip-path: polygon(0% 0, 100% 0%, 100% 100%, 80% 72%, 69% 98%, 50% 70%, 28% 100%, 25% 67%, 0% 100%);
  -webkit-mask:
    radial-gradient(100% 320% at 50% 100%, #000 49%, #0000 50%);
  mask: radial-gradient(100% 320% at 50% 100%, #000 49%, #0000 50%);
  box-shadow: 
    inset -2vmin 0 1vmin var(--green-dark), 
    inset 2vmin 0 1vmin var(--green-dark),
    inset 0vmin 2vmin 1vmin var(--green-dark)
}

.belt {
  width: 14.5%;
  height: 4%;
  background: #222;
  top: 61%;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 10% 10% 0 0;
}

.belt::before {
  content: "";
  width: 40%;
  height: 120%;
  border: 0.75vmin solid gold;
  top: -10%;
  left: 50%;
  transform: translate(-50%, 0);
  background:
    linear-gradient(gold 0 0) no-repeat 80% 50% / 25% 15%
}

.body {
  width: 14.25%;
  height: 21%;
  top: 41%;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 40% 30% 0 0;
  background:
    radial-gradient(circle at 50% 25%, gold 4%, #0000 0),
    radial-gradient(circle at 50% 50%, gold 5%, #0000 0),
    radial-gradient(circle at 50% 75%, gold 4%, #0000 0)
    ;
  background-color: var(--green);
  box-shadow:
    inset 0 1vmin 2vmin var(--green),
    inset -1vmin 0 2vmin var(--green-dark), 
    inset 1vmin 0 2vmin var(--green-dark),
    inset 0 -1vmin 2vmin var(--green-dark);
}

.collar {
  width: 17%;
  height: 5%;
  background: var(--white);
  clip-path: polygon(0% 0, 100% 0%, 100% 100%, 80% 62%, 69% 98%, 50% 50%, 28% 100%, 25% 57%, 0% 100%);
  -webkit-mask:
    radial-gradient(100% 200% at 50% 100%, #000 49%, #0000 50%);
  mask: radial-gradient(100% 200% at 50% 100%, #000 49%, #0000 50%);
  top: 39.5%;
  left: 50%;
  transform: translate(-50%, 0);
}

.arm-left {
  width: 20%;
  height: 36%;
  top: 35%;
  left: 27%;
  background:
    radial-gradient(100% 150% at 100% 100%, #0000 50%, var(--green-dark) 0, var(--green) 57%, #0000 0);
  transform: rotate(5deg);
}

.arm-right {
  width: 25%;
  height: 25%;
  top: 40%;
  left: 57.5%;
  transform: rotate(0);
  background:
    radial-gradient(100% 150% at 45% 0%, #0000 40%, var(--green) 0, var(--green-dark) 45%, #0000 0);
  transform: rotate(-10deg);
}

.hand {
  width: 5%;
  height: 5%;
  background: var(--skin);
  border-radius: 50%;
  top: 70.5%;
  left: 32%;
  box-shadow: inset 0 0 2vmin var(--skin-darker);
}

.hand + .hand {
  top: 35%;
  left: 74.5%;
}

.neck {
  width: 3%;
  height: 4%;
  background: linear-gradient(var(--skin-darker) 50%, var(--skin));
  border-radius: 100% / 30%;
  top: 37%;
  left: 50%;
  transform: translate(-50%, 0)
}

.head {
  height: 18%;
  width: 14%;
  background:
    radial-gradient(circle at 30% 23%, var(--skin) 10%, #0000 0),
    radial-gradient(circle at 72% 21%, var(--skin) 12%, #0000 0),
    radial-gradient(circle at 40% 23%, maroon 10%, #0000 0),
    radial-gradient(circle at 60% 21%, maroon 10%, #0000 0)
    ;
  background-color: var(--skin);
  border-radius: 100% / 80% 80% 120% 120%;
  top: 20.5%;
  left: 50%;
  transform: translate(-50%, 0);
  box-shadow:
    inset 0 1vmin 2vmin 0.25vmin var(--skin-dark);
}

.mouth {
  width: 30%;
  height: 10%;
  background: var(--red);
  background: linear-gradient(#fff 30%, var(--red) 0);
  border-radius: 50% / 0 0 100% 100%;
  left: 50%;
  top: 79%;
  transform: translateX(-50%);
}

.eye {
  --pos: 23%;
  width: 18%;
  height: 15%;
  background: #222;
  border-radius: 50%;
  top: 43%;
  left: var(--pos);
  background-image: radial-gradient(circle at 25% 25%, #fff 10%, #fff0 0)
}

.eye + .eye {
  left: auto;
  right: var(--pos);
}

.cheek {
  width: 30%;
  height: 10%;
  background: red;
  top: 60%;
  left: 10%;
  border-radius: 50%;
  opacity: 0.1;
}

.cheek + .cheek {
  left: auto;
  right: 10%;
}

.nose {
  border: 0.125vmin solid #0000;
  border-top: 0.4vmin solid #222;
  top: 60%;
  left: 50%;
  transform: translateX(-50%) rotate(15deg);
  border-radius: 50%;
  width: 20%;
  height: 20%;
}

.ear {
  width: 4%;
  height: 8%;
  background: var(--skin-darker);
  background: linear-gradient(to left, var(--skin-darker), var(--skin-dark));
  border-radius: 0 200% 20% 200%;
  top: 27%;
  left: 40.5%;
  box-shadow: 1.75vmin 0 maroon;
}

.ear + .ear {
  transform: scaleX(-1) rotate(-3deg);
  left: 55.5%;
  box-shadow: 2vmin 0 maroon;
}

.hat {
  width: 14.25%;
  height: 15%;
  border-radius: 100% / 40%;
  top: 22%;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: inset 0 2vmin var(--white);
}

.hat-top {
  width: 14%;
  height: 14%;
  background: var(--green);
  border-radius: 100% 10% 0 0;
  transform: translateX(-50%) rotate(6deg);
  left: 50.75%;
  top: 11%;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 90%, 0% 100%);
}

.bell {
  width: 5%;
  height: 5%;
  background:
    radial-gradient(circle at 60% 50%, darkorange 15%, #0000 0),
    linear-gradient(to right, #0000 56%, darkorange 0 63%, #0000 0) no-repeat 50% 100% / 100% 50%
    ;
  background-color: gold;
  border-radius: 50%;
  top: 9.5%;
  left: 57%;
  transform: rotate(-20deg)
}

.shadow {
  width: 60%;
  height: 3%;
  background: #0002;
  border-radius: 100%; / 0 0 200% 200%;
  top: 98.5%;
  left: 50%;
  transform: translate(-45%, 0);
  filter: blur(5px);
}


/***/

#youtube {
  z-index: 2;
  display: block;
  width: 100px;
  height: 70px;
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: red;
  border-radius: 50% / 11%;
  transition: transform 0.5s;
}

#youtube:hover,
#youtube:focus {
  transform: scale(1.1);
}

#youtube::before {
  content: "";
  display: block;
  position: absolute;
  top: 7.5%;
  left: -6%;
  width: 112%;
  height: 85%;
  background: red;
  border-radius: 9% / 50%;
}

#youtube::after {
  content: "";
  display: block;
  position: absolute;
  top: 20px;
  left: 40px;
  width: 45px;
  height: 30px;
  border: 15px solid transparent;
  box-sizing: border-box;
  border-left: 30px solid white;
}

#youtube span {
  font-size: 0;
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}
!

JS
!
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