h2 {
  font-size: 100%;
  font-style: normal;
  font-weight: normal;
  margin: 0;
  padding: 0;
}

body {
  color: #333;
  font-family: 'メイリオ', 'Meiryo', 'ヒラギノ角ゴ Pro W3', 'Hiragino Kaku Gothic Pro', 'ＭＳ Ｐゴシック', 'MS P Gothic', 'Osaka', 'Verdana', 'Arial', 'Helvetica', 'sans-serif';
  font-size: 12px;
  line-height: 1.5;
  margin: 0;
}

p {
  font-family: 'ヒラギノ角ゴ Pro W3', 'Osaka', 'ＭＳ Ｐゴシック', 'verdana', 'arial', 'sans-serif';
}

#wrapper {
  text-align: center;
}

#wrapper p {
  font-size: 36px;
  margin: 20px 0;
  text-align: center;
}

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

.grade-button {
  background: #668ad8;
  border-bottom: solid 4px #627295;
  border-radius: 3px;
  color: #fff;
  display: inline-block;
  padding: 0.5em 1em;
  padding: 25px 0;
  text-decoration: none;
  width: 250px;
}

.grade-button:active {
  border-bottom: none;
  -webkit-transform: translateY(4px);
  -ms-transform: translateY(4px);
  transform: translateY(4px);
}

.grade-button h2 {
  font-size: 30px;
  text-align: center;
}

.grade-2-button {
  margin: 10px 50px;
}