@charset "UTF-8";
html, body {
  height: 100%;
  margin: 0;
}

body {
  display: grid;
  place-content: center;
}

graph {
  width: 400px;
  height: 400px;
  border: 10px double #000;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  background: -webkit-gradient(linear, left top, left bottom, from(#000), to(#000)) 50%/100% 2px no-repeat;
  background: linear-gradient(#000, #000) 50%/100% 2px no-repeat;
  font-family: 'PT Mono', monospace;
  text-transform: uppercase;
  line-height: 1;
  --circle-up-path: path('M 0 200 A 200 200 0 0 1 400 200');
  --circle-down-path: path('M 0 200 A 200 200 0 0 0 400 200');
}
graph:before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 58%;
  height: 58%;
  -webkit-transform: translate(-50%, -50%) rotate(-135deg);
          transform: translate(-50%, -50%) rotate(-135deg);
  border: 6px double;
  border-radius: 50%;
  border-color: #000 transparent transparent #000;
}
graph:after {
  content: '♥';
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  font-family: 'Nanum Gothic', sans-serif;
  font-size: 80px;
  color: transparent;
  text-shadow: 0 0 #000;
}

[split] > * {
  position: absolute;
}

text > * {
  font-size: 50px;
  -webkit-transform: translateY(75%);
          transform: translateY(75%);
  offset-path: var(--circle-up-path);
  offset-distance: calc(8% + var(--n) * 89.5% / var(--total));
}

belt > * {
  -webkit-transform: translateY(-40px);
          transform: translateY(-40px);
  offset-path: var(--circle-down-path);
  offset-distance: calc(7% + var(--n) * 91% / var(--total));
  width: 18px;
  height: 16px;
  background: #000;
  -webkit-clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
          clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
belt > *:nth-child(even) {
  -webkit-clip-path: circle(30%);
          clip-path: circle(30%);
}

tree > * {
  width: 2px;
  height: 30px;
  -webkit-transform: translateY(-98px);
          transform: translateY(-98px);
  background: #000;
  offset-path: var(--circle-down-path);
  offset-distance: calc(5% + var(--n) * 98% / var(--total));
}
tree > *:after {
  content: '';
  position: absolute;
  top: -10px;
  left: calc(50% - 4px);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #000;
}
tree > *:nth-child(even) {
  height: 15px;
  -webkit-transform: translateY(-90px);
          transform: translateY(-90px);
}

tree[outer] > * {
  offset-path: var(--circle-up-path);
  -webkit-transform: translateY(128px);
          transform: translateY(128px);
  height: 60px;
}
tree[outer] > *:nth-child(odd) {
  height: 30px;
}

star > * {
  offset-path: var(--circle-down-path);
  offset-distance: calc(6% + var(--n) * 93% / var(--total));
  -webkit-transform: translateY(-15px);
          transform: translateY(-15px);
}
star > *:after {
  content: '***';
  font-family: verdana;
  color: #000;
  font-size: 13px;
}

circle {
  position: absolute;
  width: 30%;
  height: 30%;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%) rotate(45deg);
          transform: translate(-50%, -50%) rotate(45deg);
  border: 6px solid #000;
  border-style: double solid solid double;
  border-radius: 50%;
  background: #fff;
}

arrow:after, arrow:before {
  content: '';
  position: absolute;
  top: calc(50% - 11px);
  width: 20px;
  height: 20px;
  -webkit-transform: rotateX(45deg) rotate(45deg);
          transform: rotateX(45deg) rotate(45deg);
  border: 2px solid #000;
  background: #fff;
}

arrow:before {
  left: -13px;
}

arrow:after {
  right: -13px;
}

@media screen and (max-width: 440px) {
  graph {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
  }
}
warning {
  background: yellow;
  position: fixed;
  top: 0;
  width: 100%;
  text-align: center;
  padding: .5em 0;
}

@supports (offset-path: path("M 0 0 z")) {
  warning {
    display: none;
  }
}