body, html {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #fff;
  color: #555;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: left;
  line-height: 2em;
  flex-direction:column;
}

h1 {
  line-height: 1.2em;
  text-align: left;
  margin: 0;
  padding: 0;
}

p {
  font-size: 1.6rem;
  margin-bottom: 1em;
  text-align: left;
  line-height: 1.5em;
}

.container {
  margin-top: 5rem;
  max-width: 760px;
  padding: 1rem;
}


a {
  color: #555;
  font-size: 1.6rem;
}

.button:hover {
  background-color: #eaba0c64;
}

.navi {
  a {
      font-size: 1rem;
      margin-right: 1.5rem;
  }
  position: absolute;
  right: 0;
  top: 0;
  padding: 1em;
}