body{
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Helvetica, Arial, sans-serif;
}

h1 {
    font-size: 25px;
}

p {
    margin-top: 0px;
    font-weight: thin;
    font-size: 20px;
}

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  /* bring your own prefixes */
  transform: translate(-50%, -50%);
  text-align: center;
}