html, body {
  margin: 0;
  background-color: #fff;
	font: normal 1em "Roboto Slab", Georgia, Times, serif;
	line-height: 140%;
}

a:link, a:visited {
  text-decoration: none;
  color: #4f84c4;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}

a:active {
  text-decoration: none;
}

a:link:hover {
  text-decoration: none;
  /*color: #333;*/
  -webkit-transition: 0.3s;
  transition: 0.3s;
}

.flex {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 80%;
  color: #333;
  font-size: 100%;
}

.flex span {
  margin-top: 25px;
  color: #fff;
  font: normal 1em "Roboto Slab", Georgia, Times, serif;
}

h1 {
  font-size: 2em;
}

/* Bildschirme mit maximal x Breite */
@media screen and (max-width: 600px) {
  .box {
    font-size: 1em;
    width: 80%;
  }

  .flex span {
    font-size: 1em;
  }
}