src/css/progress.css
.slider.halfwidth {
  position: absolute;
  width: 50%;
  height: 5px;
  overflow-x: hidden;
}

.line.dark {
  position: absolute;
  opacity: 0.4;
  background: transparent;
  width: 150%;
  height: 5px;
}

.subline.dark {
  position: absolute;
  background: #115cd6;
  height: 5px;
}

.slider.fullwidth {
  position: absolute;
  width: 100%;
  height: 5px;
  overflow-x: hidden;
}

.slider.userdefined {
  width: 0px;
  height: 5px;
  overflow-x: hidden;
}

.slider.w80 {
  position: absolute;
  width: 80%;
  height: 5px;
  overflow-x: hidden;
}

.slider {
  width: 250px;
}

.line.light {
  position: absolute;
  opacity: 0.4;
  background: #4a8df8;
  width: 150%;
  height: 5px;
}

.subline.light {
  position: absolute;
  background: #4a8df8;
  height: 5px;
}

.inc {
  animation: increase 2s infinite;
}

.dec {
  animation: decrease 2s 0.5s infinite;
}

@keyframes increase {
  from {
    left: -5%;
    width: 5%;
  }
  to {
    left: 130%;
    width: 100%;
  }
}

@keyframes decrease {
  from {
    left: -80%;
    width: 80%;
  }
  to {
    left: 110%;
    width: 10%;
  }
}

.slider.fixed_bottom {
  bottom: 0px;
  margin-bottom: 20px;
}

.cp-spinner {
  width: 48px;
  height: 48px;
  display: inline-block;
  box-sizing: border-box;
  position: relative;
}

.cp-round:before {
  border-radius: 50%;
  content: " ";
  width: 48px;
  height: 48px;
  display: inline-block;
  box-sizing: border-box;
  border-top: solid 6px #111;
  border-right: solid 6px #111;
  border-bottom: solid 6px #111;
  border-left: solid 6px #111;
  position: absolute;
  top: 0;
  left: 0;
}

.cp-round:after {
  border-radius: 50%;
  content: " ";
  width: 48px;
  height: 48px;
  display: inline-block;
  box-sizing: border-box;
  border-top: solid 6px #00aeff;
  border-right: solid 6px transparent;
  border-bottom: solid 6px transparent;
  border-left: solid 6px transparent;
  position: absolute;
  top: 0;
  left: 0;
  animation: cp-round-animate 1s ease-in-out infinite;
}

.cp-round.big:before,
.cp-round.big:after,
.cp-spinner.big {
  width: 75px;
  height: 75px;
  border-radius: 50%;
}

@keyframes cp-round-animate {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}

progress {
  -webkit-appearance: none;
  height: 7px;
}

progress::-webkit-progress-value:indeterminate {
  background-color: gray;
}

progress::-webkit-progress-bar {
  background: var(--buttonBackgroundColor);
  border-radius: 50px;
}

/* Now the value part */
progress::-webkit-progress-value {
  border-radius: 50px;
  background-color: var(--accent);
}
