stylus/global.css

.svg-icon.checked {
  position: absolute;
  height: 8px;
  width: 8px;
  display: none;
  fill: #000;
  margin: 2px 0 0 2px;
}

input[type="checkbox"]:not(.slider):checked + .svg-icon.checked {
  display: inline-flex;
  transition: fill .1s;
}

input[type="checkbox"]:not(.slider) {
  position: absolute;
  left: 0;
  top: 0;
  -moz-appearance: none;
  -webkit-appearance: none;
  pointer-events: none;
  border: 1px solid hsl(0, 0%, 46%);
  height: 12px;
  width: 12px;
  display: inline-flex;
  border-radius: 2px;
  background-color: hsla(0, 0%, 0%, .1);
  outline: none;
  margin: 0;
  transition: background-color .1s, border-color .1s;
}

input[type="checkbox"]:not(.slider):hover {
  border-color: hsl(0, 0%, 32%);
  background-color: hsl(0, 0%, 82%);
}

input[type="checkbox"]:not(.slider):checked + .svg-icon.checked {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

input[type="checkbox"]:not(.slider):disabled {
  background-color: transparent;
  border-color: hsl(0, 0%, 50%);
}

input[type="checkbox"]:not(.slider):disabled + .svg-icon.checked {
  fill: hsl(0, 0%, 50%);
}

input[type="checkbox"]:not(.slider):disabled + .svg-icon.checked + span {
  color: hsl(0, 0%, 50%);
}

label {
  transition: color .1s;
}

select {
  -moz-appearance: none;
  -webkit-appearance: none;
  height: 22px;
  color: currentColor;
  background-color: transparent;
  border: 1px solid hsl(0, 0%, 66%);
  padding: 0 20px 0 6px;
  transition: color .5s;
}

.firefox select {
  padding: 0 20px 0 2px;
}

.select-resizer {
  display: inline-flex!important;
  cursor: default;
  position: relative;
}

.svg-icon.select-arrow {
  pointer-events: none;
  cursor: default;
  display: inline-flex;
  height: 14px;
  width: 14px;
  fill: currentColor;
  position: absolute;
  top: 4px;
  right: 4px;
  transition: fill .5s;
}

@supports (-moz-appearance: none) {
  .moz-appearance-bug .svg-icon.checked {
    display: none !important;
  }

  .moz-appearance-bug input[type="checkbox"] {
    -moz-appearance: checkbox !important;
  }

  ::-moz-focus-inner {
    border: 0; 
  }

  svg {
    transform: scale(1); /* de-blur */
  }
}