@media (max-width: 800px) {
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1em;
    line-height: 1.5;
    color: #333;
  }

  h1,
  h2,h4 {
    font-size: 6vw;
    margin: 0;
  }

  p {
    font-size: 5vw;
    margin-bottom: 1vw;
  }

  span{ 
    font-size: 4vw;
  }
}