input[type="range"].slider-custom {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  margin-left: 6px;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  background: linear-gradient(
    to right,
    var(--thumb-color, #000) var(--fill, 50%),
    rgba(255, 255, 255, 0.15) var(--fill, 50%)
  );
}

input[type="range"].slider-custom::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  background: rgba(255, 255, 255, 1);
  border: 3px solid var(--thumb-color, #000);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.15s;
}

input[type="range"].slider-custom:hover::-webkit-slider-thumb {
  transform: scale(1.15);
}

input[type="range"].slider-custom::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid var(--thumb-color, #000);
}