*, *:before, *:after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
  }
  body > h1 {
    margin: 1.5rem 0;
    font-family: Helvetica, sans-serif;
    color: #333;
  }
  .video-player {
    width: 95%;
    max-width: 750px;
    position: relative;
    font-size: 0;
    overflow: hidden;
  }
  .video {
    width: 100%;
  }
  .controls__button {
    background: none;
    border: 0;
    line-height: 1;
    color: white;
    text-align: center;
    outline: 0;
    padding: 0;
    cursor: pointer;
    max-width: 50px;
  }
  .controls__slider {
    width: 10px;
    height: 30px;
  }
  .controls {
    display: flex;
    position: absolute;
    bottom: 0;
    width: 100%;
    flex-wrap: wrap;
    background: rgba(0,0,0,0.1);
    transform: translateY(0);
  }
  .controls > * {
    flex: 1;
  }
  .progress {
    flex: 10;
    position: relative;
    display: flex;
    flex-basis: 100%;
    height: 5px;
    /* background: rgba(0,0,0,0.5); */
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    height: 15px;
  }
  .progress__filled {
    width: 50%;
    background: #00ff40;
    flex: 0;
    flex-basis: 0%;
  }
  
  input[type=range] {
    -webkit-appearance: none;
    background: transparent;
    width: 100%;
    margin: 0 5px;
  }
  input[type=range]:focus {
    outline: none;
  }
  input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8.4px;
    cursor: pointer;
    background: rgba(255,255,255,0.8);
    border-radius: 4px;
  }
  input[type=range]::-webkit-slider-thumb {
    height: 0.9rem;
    width: 0.9rem;
    border-radius: 50px;
    background: #00ff40;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -3.5px;
  }
  input[type=range]::-moz-range-track {
    width: 100%;
    height: 8.4px;
    cursor: pointer;
    background: rgba(255,255,255,0.8);
    border-radius: 4px;
  }
  input[type=range]::-moz-range-thumb {
    height: 0.9rem;
    width: 0.9rem;
    border-radius: 50px;
    background: #00ff40;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -3.5px;
  }