html, body {
  margin: 0;
  padding: 0;
  text-align: center  ;
}
canvas {
  display: block;
}

button{
  font-size: 11px;
  border: 1px solid rgba(253, 81, 23);
  width: 4em;
  border-radius: 4px;
  background-color: transparent;
  margin-left: 4em;
  padding: .25ex 1em;
}

button:hover{background-color: rgba(253, 81, 23, 0.193);}

input[type=range] {
  height: 10px;
  width: 50%;
  -webkit-appearance: none;
}

/*progress support*/
input[type=range].slider-progress {
  --range: calc(var(--max) - var(--min));
  --ratio: calc((var(--value) - var(--min)) / var(--range));
  --sx: calc(0.5 * 10px + var(--ratio) * (100% - 10px));
}

input[type=range]:focus {
  outline: none;
}

/*webkit*/
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 1em;
  background: #FD5017;
  border: none;
  box-shadow: 0 0 2px black;
  margin-top: calc(max((1px - 1px - 1px) * 0.5,0px) - 10px * 0.5);
}

input[type=range]::-webkit-slider-runnable-track {
  height: 1px;
  border: 1px solid #00000024;
  border-radius: 0.5em;
  background: #efefef;
  box-shadow: none;
}

input[type=range]:hover::-webkit-slider-runnable-track {
  background: #e5e5e5;
  border-color: #9a9a9a;
}

input[type=range]:active::-webkit-slider-runnable-track {
  background: #f5f5f5;
  border-color: #c1c1c1;
}

input[type=range].slider-progress::-webkit-slider-runnable-track {
  background: linear-gradient(#007cf8,#007cf8) 0/var(--sx) 100% no-repeat, #efefef;
}

input[type=range].slider-progress:hover::-webkit-slider-runnable-track {
  background: linear-gradient(#0061c3,#0061c3) 0/var(--sx) 100% no-repeat, #e5e5e5;
}

input[type=range].slider-progress:active::-webkit-slider-runnable-track {
  background: linear-gradient(#2f98f9,#2f98f9) 0/var(--sx) 100% no-repeat, #f5f5f5;
}

/*mozilla*/
input[type=range]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border-radius: 1em;
  background: #FD5017;
  border: none;
  box-shadow: 0 0 2px black;
}

input[type=range]::-moz-range-track {
  height: max(calc(1px - 1px - 1px),0px);
  border: 1px solid #00000024;
  border-radius: 0.5em;
  background: #efefef;
  box-shadow: none;
}

input[type=range]:hover::-moz-range-track {
  background: #e5e5e5;
  border-color: #9a9a9a;
}

input[type=range]:active::-moz-range-track {
  background: #f5f5f5;
  border-color: #c1c1c1;
}

input[type=range].slider-progress::-moz-range-track {
  background: linear-gradient(#007cf8,#007cf8) 0/var(--sx) 100% no-repeat, #efefef;
}

input[type=range].slider-progress:hover::-moz-range-track {
  background: linear-gradient(#0061c3,#0061c3) 0/var(--sx) 100% no-repeat, #e5e5e5;
}

input[type=range].slider-progress:active::-moz-range-track {
  background: linear-gradient(#2f98f9,#2f98f9) 0/var(--sx) 100% no-repeat, #f5f5f5;
}

/*ms*/
input[type=range]::-ms-fill-upper {
  background: transparent;
  border-color: transparent;
}

input[type=range]::-ms-fill-lower {
  background: transparent;
  border-color: transparent;
}

input[type=range]::-ms-thumb {
  width: 10px;
  height: 10px;
  border-radius: 1em;
  background: #FD5017;
  border: none;
  box-shadow: 0 0 2px black;
  margin-top: 0;
  box-sizing: border-box;
}

input[type=range]::-ms-track {
  height: 1px;
  border-radius: 0.5em;
  background: #efefef;
  border: 1px solid #00000024;
  box-shadow: none;
  box-sizing: border-box;
}

input[type=range]:hover::-ms-track {
  background: #e5e5e5;
  border-color: #9a9a9a;
}

input[type=range]:active::-ms-track {
  background: #f5f5f5;
  border-color: #c1c1c1;
}

input[type=range].slider-progress::-ms-fill-lower {
  height: max(calc(1px - 1px - 1px),0px);
  border-radius: 0.5em 0 0 0.5em;
  margin: -1px 0 -1px -1px;
  background: #FD5017;
  border: 1px solid #00000024;
  border-right-width: 0;
}

input[type=range].slider-progress:hover::-ms-fill-lower {
  background: #FD5017;
  border-color: #9a9a9a;
}

input[type=range].slider-progress:active::-ms-fill-lower {
  background: #FD5017;
  border-color: #c1c1c1;
}