html {
  font-size: 16px;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

.container {
  width: 80%;
  max-width: 50rem;
  margin: 0 auto;
  padding: 1.25rem;
}

/* ヘッダー */
h1 {
  background-color: #ff738b;
  border-radius: 0.9375rem;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: left;
  height: 5rem;
  margin-bottom: 1.875rem;
  padding: 0.9375rem;
}

#icon {
  margin-right: 0.75rem;
}

/* キャッチコピー */
.catch {
  background: #ffffff;
  text-align: center;
  margin-bottom: 1.25rem;
}

/* セクション共通 */
section {
  background-color: #f8f8f8;
  border: 0.0625rem solid #fdd190;
  border-radius: 0.3125rem;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  text-align: left;
}

h2 {
  color: #000000;
  padding-left: 1.25rem;
  background-color: #86bcfa;
  margin-bottom: 0.9375rem;
  border-radius: 1.25rem;
}

h3 {
  margin-left: 1.25rem;
  margin-top: 1.875rem;
}

.highlight-text {
  background-color: #7ec5ff;
  border-radius: 0.3125rem;
  padding: 0.3125rem 0.625rem;
}

p {
  margin: 0.5rem 0;
  padding: 0 1.25rem;
}

/* アプリ画像 */
.app-image {
  width: 11.25rem;
  height: auto;
  border-radius: 0.5rem;
  margin: 0.5rem 0 0.5rem 1.25rem;
}

/* ダウンロードセクション */
.download-section {
  text-align: left;
  margin: 2rem 0;
}
.download {
  text-align: left;
}
.download img {
  margin: 1rem 0;
  max-width: 100%;
  height: auto;
}
.download p {
  margin: 0.375rem 0;
  padding: 0 1.25rem;
}

/* CTAボタン */
.cta-button {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  background-color: #0070f3;
  color: white;
  font-size: 1.1rem;
  border-radius: 0.375rem;
  text-decoration: none;
  margin-top: 0.75rem;
  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1);
}
.cta-button:hover {
  background-color: #005dc0;
}

/* フッター */
footer {
  margin-top: 3.125rem;
  font-size: 0.9rem;
  text-align: center;
}

/* 画像全般 */
img {
  border-radius: 2%;
}

/* 拡大画像（クリック時） */
.clickable-image {
  margin-left: 1.25rem;
  transition: transform 0.3s ease;
}
.clickable-image:hover {
  transform: scale(2.5);
  cursor: pointer;
}

/* カード表示 */
#cards {
  flex-wrap: wrap;
  display: flex;
  justify-content: center;
}

.setumei-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.25rem;
  border: 0.125rem solid #1b1b1b;
  border-radius: 0.3125rem;
  font-weight: bold;
  width: 12.5rem;
}


@media screen and (max-width: 480px) {
  html {
    font-size: 15px; /* 少し小さめでもOK */
  }

  .container {
    width: 95%;
    padding: 1rem;
  }

  h1 {
    font-size: 1.5rem;
    height: auto;
    flex-direction: column;
    align-items: flex-start;
  }

  .app-image {
    width: 100%;
    margin-left: 0;
  }

  .clickable-image:hover {
    transform: scale(1.5); /* スマホでは拡大率を控えめに */
  }
}