index.css

html, body {
  width: 100vw;
  height: 100vh;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  font-family: Lato, Helvetica, Arial, Sans-serif;
  font-size: 18px;
  min-width: 940px;
}

hr {
    border: 0;
    padding-bottom: 1px;
    height: 0px;
    width: 100%;
    margin: 5px 0 25px 0;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0));
}