* {
    box-sizing: border-box;
  }
  
  body {
    background-color: #e4e4e4;
    font-family: "Merriweather Sans", sans-serif;
    color: #333;
    line-height: 1.5;
  }
  
  .container {
    max-width: 768px;
    width: 100%;
    margin: 0 auto;
    background-color: #e4e4e4;
    padding: 1rem;
  }
  
  .timer {
    text-align: center;
    font-weight: bold;
    font-size: 3rem;
  }
  
  .words {
    color: #999;
    text-overflow: clip;
    overflow: hidden;
    white-space: nowrap;
    font-size: 1.5rem;
    position: relative;
  }
  .words .word.current {
    color: #333;
  }
  .words .word {
    margin-right: .5rem;
  }
  .words:after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100px;
    content: "";
    background: -webkit-gradient(linear, left top, right top, from(transparent), to(#f1f1f1));
    background: linear-gradient(to right, transparent, #f1f1f1);
  }
  
  .word-input {
    width: 100%;
    font: inherit;
    color: inherit;
    border: none;
    border-bottom: 2px solid #ccc;
    background-color: transparent;
    padding: .5rem;
    font-size: 1.5rem;
  }
  
  .stats {
    display: -webkit-box;
    display: flex;
    flex-wrap: wrap;
  }
  .stats .stat {
    min-width: 200px;
    -webkit-box-flex: 1;
            flex-grow: 1;
  }
  
  .btn {
    border: 2px solid #3f51b5;
    color: white;
    background-color: #303f9f;
    font: inherit;
    padding: 0.5rem 1rem;
    border-radius: 4px;
  }
  .btn.btn-replay {
    font-weight: bold;
    margin: 0 auto;
    display: none;
  }