html,
body {
  width: 100%;
  height: 100%;
  margin: 0 auto;
  padding: 0;
  background-color: #222222;
  color: #ffffff;
}
.page {
  width: 100%;
  height: 100%;
  display: table;
}
.contents {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  -webkit-tap-highlight-color: transparent;
}
.service_button {
  width: 300px;
  height: 100px;
  font-size: 32px;
}
#content-text {
  font-weight: bold;
  font-size: 3em;
}
