@media screen and (-webkit-min-device-pixel-ratio:0) {
  .skill-slider {
    overflow: hidden;
    -webkit-appearance: none;
    background-color: #ff0000;
    width: 120px;
    border-radius: 3px;
  }

  .skill-slider::-webkit-slider-runnable-track {
    height: 10px;
    -webkit-appearance: none;
    color: #42ff58e7;
    margin-top: -1px;
  }

  .skill-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 0px;
    height: 15px;
    background: #42ff58;
    cursor: pointer;
    box-shadow: -120px 0 0 120px #42ff58;
  }
}
.skill-slider::-moz-range-progress {
  background-color: #42ff58; 
}
.skill-slider::-moz-range-track {  
  background-color: #ff0000;
}