body {
  margin: 0;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 15px;
  padding-right: 15px;
  background-color: #f0f0f0;
  position: sticky;
  top: 0;
  z-index: 999;
}

@media (max-width: 650px) {
  .menu-item {
    display: none;
  }
  .menu-item-sp {
    display: block;
  }
  
  .container {
    flex-direction: column !important; /* 狭い画面では縦並びに変更 */
    align-items: center;
    padding-left: 0 !important;
    padding-right: 0;
  }

  .column {
/*     width: 100%; カラムの幅を100%に設定 */
    padding: 10px; /* パディングを調整して余白を縮小 */
    margin-bottom: 5px;
  }

  .start {
/*     padding-left: 20px;
    padding-right: 20px; */
  }
  .main {
/*     padding-left: 20px;
    padding-right: 20px; */
  }
  
  .melody {
    flex-direction: column;
  }
  
  .rect {
    text-align: center;
    align-items: center;
    justify-content: center;
  }
  
  svg {
    width: 100%;
  }
}

@media (min-width: 651px) {
  .menu-item {
    display: block;
  }
  .menu-item-sp {
    display: none;
  }
  .main {
    padding-left: 100px;
    padding-right: 100px;
  }
  
  .arrange {
    flex-direction: row;
  }
  
  svg {
    width: 30vw;
  }
}

svg {
  padding-top: 20px;
}

.logo {
  width: 40px;
  height: 40px;
  margin-right: 10px;
}

.title {
  font-size: 24px;
  color: #333333;
  font-weight: bold;
  text-decoration: none;
}

.title-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.menu-group {
  display: flex;
  list-style: none;
}

.menu-item-sp img {
  height: 35px;
  padding: 5px;
}

.menu-item a {
  text-decoration: none;
  color: #333333;
  font-weight: bold;
}

.background-image {
  position: relative;
  width: 100%;
  height: 300px; /* お好みの高さに調整 */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  overflow: hidden;
  transform: translate3d(0px, 0px, 0px);
}

.background-image::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("https://cdn.glitch.global/f6b8403f-df22-44d1-8c21-1151b6811bd0/9070c844-ac13-4dde-bee7-bcdd572eb877.%E9%A7%85%E5%90%8D%E6%A8%99_%E7%99%BD%E5%B2%A1%20(1).png?v=1745585749579"); /* 指定画像を挿入 */
  background-size: cover;
  background-position: center;
  opacity: 0.3; /* 透明度を調整（0.0～1.0） */
  z-index: 1;
}

.content {
  position: relative;
  z-index: 2; /* 背景画像よりも前面に表示 */
  font-family: "arial", sans-serif;
  font-size: 20px; /* 文字の大きさを設定 */
  color: #0d1b2a; /* 文字の色を設定 */
  margin: 0; /* 不要な余白を削除 */
  padding-left: 20px;
  padding-right: 15px;
}

.main h1 {
  border-left: 10px solid #3f7aa1;
  color: #3f7aa1;
  font-weight: 400;
  display: flex;
/*   margin: 0; */
  font-size: 2rem;
  padding-bottom: 10px;
/*   padding-top: 20px; */
  justify-content: left;
  padding-left: 30px;
}

.bellCanvas {
  width: 100%;
}

.container {
  position: relative;
  display: inline-block;
  max-width: 300px; /* 画像サイズを適宜調整 */
  text-align: center;
}

.container img {
  width: 100%;
  height: auto;
}

.button-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 60px; /* ONとOFFの間隔を調整 */
}

/* ボタン共通スタイル */
.button-wrapper button {
  width: 50%; /* 画像の幅に対する割合 */
  max-width: 80px; /* ボタンの最大幅 */
  padding: 10px 0;
  font-size: 16px;
  border: none;
  cursor: pointer;
  border-radius: 5px;
  text-align: center;
  opacity: 0.8; /* 半透明 */
}

/* ONボタン */
.start {
/*   background-color: black; */
  color: white;
}

/* OFFボタン */
.stop {
/*   background-color: red; */
  color: white;
}

.column {
  flex: 2;
  padding: 10px;
  margin-top: 15px;
  margin-bottom: 15px;
  border-radius: 8px;
  transition: transform 0.2s;
  position: relative;
  display: flex;
/*   text-align: left; */
  text-align: center;
  height: 70px;
  align-items: center;
}

/* 画像のスタイル */
.column img {
  width: auto; /* 画像の幅を親要素に合わせる */
  height: 100%;
}

.column h2 {
  font-size: 20px;
  color: #333333;
  font-weight: bold;
  text-decoration: none;
/*   padding-left: 20px; */
  margin: 0px;
}

.platform h2 {
  text-align: left;
  margin: 0; /* 不要な余白を削除 */
}

.column p {
  font-size: 15px;
  color: #333333;
  text-decoration: none;
  margin: 0;
  
  /* 修正部分 */
  display: block; /* flex を解除 */
  text-align: left; /* 左寄せ */
}

.column a {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.platform {
  flex-direction: column;
  display: flex;
  padding-left: 20px;
/*   align-items: center; */
/*   display: flex; */
/*   flex-direction: column; /* 縦並び */
  align-items: flex-start; /* 左寄せ */
}

.footer {
  padding: 2rem;
  margin-top: 40px;
  font-size: 15px;
  color: #999999;
  background: #ffffff;
  background-color: #ededed;
  text-align: left !important;
}

.footer__navi {
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer__navi li {
  display: inline-block;
}

.footer__navi li:not(:last-child) {
  margin-right: 16px;
}

.footer__logo {
  display: flex;
  margin-bottom: 1rem;
}

.footer__logo img {
  margin-right: 10px;
}

.footer p {
  margin: 0;
}

/* svg {
  width: 200px;
  height: 300px;
} */
.button {
  cursor: pointer;
}

.melody {
  display: flex;
}

.main h2 {
  text-align: center;
}

iframe {
  padding-left: 20px;
}