body
  {
    background: #fff;
    padding: 10px;
  }
  h1
  {
    font-size: 45px;
    text-align: center;
    color: #FFFFFF;
  }
.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 25px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

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

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  background: #4CAF50;
  cursor: pointer;
}
input[type="range"] { 
    margin: auto;
    -webkit-appearance: none;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border-radius: 0; /* iOS */
}

::-webkit-slider-runnable-track {
    background: #ddd;
}

/*
 * 1. Set to 0 width and remove border for a slider without a thumb
 */
::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px; /* 1 */
    height: 40px;
    background: #fff;
    box-shadow: -100vw 0 0 100vw #2ff77a;
    border: 2px solid #999; /* 1 */
}

::-moz-range-track {
    height: 40px;
    background: #ddd;
}

::-moz-range-thumb {
    background: #fff;
    height: 40px;
    width: 20px;
    border: 3px solid #999;
    border-radius: 0 !important;
    box-shadow: -100vw 0 0 100vw #2B2B5E;
    box-sizing: border-box;
}

::-ms-fill-lower { 
    background: #2B2B5E;
}

::-ms-thumb { 
    background: #fff;
    border: 2px solid #999;
    height: 40px;
    width: 20px;
    box-sizing: border-box;
}

::-ms-ticks-after { 
    display: none; 
}

::-ms-ticks-before { 
    display: none; 
}

::-ms-track { 
    background: #ddd;
    color: transparent;
    height: 40px;
    border: none;
}

::-ms-tooltip { 
    display: none;
}