.klassName,
.return,
.regist {
  display: inline-block;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--main-text-color);
  background-color: var(--button-bg-color);
  padding: 0 3px;
  text-align: center;
  width: 50px;

  transition: width 0.5s;
}

.klassName:hover,
.return:hover,
.regist:hover {
  background-color: var(--button-hover-bg);
  width: 80px;
}

.klassName:focus,
.return:focus,
.regist:focus {
  background-color: var(--button-hover-bg);
  width: 80px;
}

.attendKlassSelect li,
.KlassSelect li,
.actionButtons li {
  display: inline-block;
}

/* ************************科目選択ボタン********************* */
.subjectName {
  display: inline-block;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--main-text-color);
  background-color: var(--button-bg-color);
  padding: 5px 10px;
  text-align: center;

  transition: padding 0.3s;
  opacity: 0;
}

.subjectName:hover,
.subjectName:focus {
  background-color: var(--button-hover-bg);
  padding: 15px 10px;
  border-bottom: 3px solid black;
}

.subjectSelect li {
  display: inline-block;
  position: relative;
}

.subjectSelect ul {
  display: block;
  background-color: var(--sub-bg-color);
  max-width: 80%;
  margin-left: 10%;
  border-radius: 30px;
  padding: 10px;
}

.subjectSelect {
  text-align: center;
}

/* 科目ボタン登場アニメーション */
.subjectAnime1 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime2 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime3 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime4 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime5 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime6 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime7 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime8 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime9 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime10 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime11 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime12 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime13 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime14 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime15 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime16 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime17 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime18 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime19 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime20 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime21 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime22 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime23 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime24 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime25 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime26 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime27 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime28 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime29 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime30 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime31 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime32 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}
.subjectAnime33 {
  animation: subjectButton forwards 0.5s ease-out 0s;
}

@keyframes subjectButton {
  0% {
    transform: translateY(-300px);
    opacity: 0;
  }
  50% {
    transform: translateY(80px);
    opacity: 1;
  }
  75% {
    transform: translateY(-20px);
  }
  100% {
    transform: translateY(0px);
    opacity: 1;
  }
}