body {
  height: 3000px;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-size: large;
}

.center {
  margin: 0%;
  width: 40%;
  padding: 10px;
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 32px;
  background: #50c79d;
  outline: none;
  opacity: 0.9;
  -webkit-transition: 0.2s;
  transition: opacity 0.2s;
  border: 2px solid black;
}
.button {
  background-color: #50c79d; /* Green */
  border: 2px solid black;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  touch-action: manipulation;
}
.slider:hover {
  opacity: 1;
}

.center {
  text-align: center;
}

.heading {
  padding-left: 85px;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  background: #04aa6d;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  background: #04aa6d;
  cursor: pointer;
}