style.css

.App {
  font-family: sans-serif;
}

.navbar {
  overflow: hidden;
  background-color: #333;
}

.navbar a {
  float: left;
  display: block;
  color: white;
  text-align: center;
  padding: 14px 20px;
  text-decoration: none;
}

.navbar a.right {
  float: right;
}

.navbar a:hover {
  background-color: #ddd;
  color: black;
}

.background {
  text-align: center;
}

body {
  background-color: #7d796e;
}

.title {
  text-align: center;
}

.hardware_list {
  text-align: center;
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 25px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: 0.2s;
  transition: opacity 0.2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  background: #4caf50;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  background: #4caf50;
  cursor: pointer;
}