header, main, footer {
  width: 90%;
}

header {
  margin: 0 auto ;
  padding-top: 2%;
}

h1 {
  font-size: 1.8em;
}

#result {
  width: 100%;
}

footer {
  padding: 2% 5%;
}

#option a {
  text-align: center;
  padding-left: 10%;
}

#scroll_to_top {
  padding: 0 10px;

}