spark/examples/multiple-viewpoints/style.css

body {
  margin: 0;
  background-color: black;
}

header {
  margin: 0 auto;
  padding: 10px 0;
  min-width: 300px;
  width: 50%;
}

/********** Range Input Styles **********/
/*Range Reset*/
input {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  width: 100%;
  padding: 10px 0;
}

/* Removes default focus */
input:focus {
  outline: none;
}

/***** Chrome, Safari, Opera and Edge Chromium styles *****/
/* slider track */
input::-webkit-slider-runnable-track {
  background-color: #4a4a4a;
  border-radius: 0.5rem;
  height: 0.3rem;
  margin-top: 1.2rem;
}

/* slider thumb */
input::-webkit-slider-thumb {
  -webkit-appearance: none;
  /* Override default look */
  appearance: none;
  margin-top: -9px;
  /* Centers thumb on the track */

  /*custom styles*/
  background-color: #e5e5e5;
  height: 1.4rem;
  width: 1.4rem;
  border-radius: 1rem;
  border: none;
}

#camera1::-webkit-slider-runnable-track {
  background-color: #223165;
}

#camera1::-webkit-slider-thumb {
  background-color: #4967c9;
}

#camera2::-webkit-slider-runnable-track {
  background-color: #5c2424;
}

#camera2::-webkit-slider-thumb {
  background-color: #c44b4b;
}

/******** Firefox styles ********/
/* slider track */
input::-moz-range-track {
  border-radius: 0.5rem;
  height: 0.3rem;
  opacity: 0.5;
}

/* slider thumb */
input::-moz-range-thumb {
  height: 1.4rem;
  width: 1.4rem;
  border-radius: 1rem;
  border: none;
}

#camera2::-moz-range-track,
#camera2::-moz-range-thumb {
  background-color: #c44b4b;
}

#camera1::-moz-range-track,
#camera1::-moz-range-thumb {
  background-color: #4967c9;
}