body {
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

/* ヘッダー */
header {
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.8rem 1rem;
}
.header-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.logo {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.3rem;
  color: #0056b3;
  margin: 0;
}

/* スマホ用ナビゲーションをボタン風に綺麗に並べる */
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
nav a:not(.insta-btn) {
  text-decoration: none;
  color: #0056b3;
  background-color: #f0f7ff;
  border: 1px solid #bae6fd;
  padding: 5px 10px;
  border-radius: 15px;
  font-weight: 500;
  font-size: 0.8rem;
  transition: all 0.2s;
}
nav a:not(.insta-btn):hover {
  background-color: #0056b3;
  color: #fff;
}

/* ★Instagram専用のピンク色（グラデーション）丸ボタンデザイン */
.insta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%);
  color: #fff !important;
  border-radius: 50%;
  font-size: 1.1rem;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.2s, opacity 0.2s;
  flex-shrink: 0;
}
.insta-btn:hover {
  transform: scale(1.1);
  opacity: 0.9;
}


/* ==========================================
   スマホ表示（デフォルト）のデザイン調整
   ========================================== */
.hero-pc-only {
  display: none;
}
.hero-mobile-only {
  display: block;
}

.hero {
  background: linear-gradient(135deg, #e0f2fe 0%, #f0fdf4 100%);
  text-align: center;
  padding: 20px 10px;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

/* 上の青い文字：大きく目立たせる */
.hero-top-text {
  margin-bottom: 15px;
}
.hero .subtitle {
  background: #ffffff;
  color: #0056b3;
  display: inline-block;
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 1.15rem;
  letter-spacing: 0.05em;
  font-weight: bold;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  border: 1px solid #bae6fd;
  line-height: 1.5;
}

/* スマホ画像：講師と右側のダイヤモンドヘッドがしっかり見えるように調整 */
.hero-image-container {
  width: 100%;
  max-width: 800px;
  height: 220px;
  margin: 0 auto 15px auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  background: url('top-bg.jpg') no-repeat right center / cover;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
}

/* 下部の説明文 */
.hero-bottom-text {
  max-width: 750px;
  margin: 0 auto;
  color: #333;
  padding: 0 5px;
}
.hero-bottom-text h2 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 10px;
  color: #1e293b;
  border-bottom: none !important;
  padding-bottom: 0 !important;
  line-height: 1.6;
}
.hero-bottom-text p {
  font-size: 0.95rem;
  font-weight: 500;
  color: #475569;
  margin: 0;
  line-height: 1.6;
}


/* ==========================================
   PC表示（横幅768px以上）のときの設定
   ========================================== */
@media (min-width: 768px) {
  .hero-mobile-only {
    display: none;
  }
  .hero-pc-only {
    display: block;
  }

  header {
    padding: 1rem 2rem;
  }
  nav {
    display: flex;
    gap: 0;
    align-items: center;
  }
  nav a:not(.insta-btn) {
    background: none;
    border: none;
    padding: 0;
    margin-left: 20px;
    font-size: 0.95rem;
    color: #555;
    border-radius: 0;
  }
  nav a:not(.insta-btn):hover {
    background: none;
    color: #0056b3;
  }
  
  /* PCでのインスタボタンの位置調整 */
  .insta-btn {
    margin-left: 20px;
  }

  .hero {
    position: relative;
    background: url('top-bg.jpg') no-repeat center right/cover;
    width: 100%;
    height: 580px;
    border-radius: 12px;
    margin-bottom: 40px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    padding: 0;
  }

  .hero-pc-top {
    position: absolute;
    top: 45px;
    left: 0;
    width: 100%;
    text-align: center;
    z-index: 2;
  }
  .hero-pc-subtitle {
    font-size: 2.1rem;
    font-weight: bold;
    color: #ffffff;
    text-shadow: 0 3px 8px rgba(0,0,0,0.7);
    letter-spacing: 0.05em;
    margin: 0;
    background: none;
    border: none;
    padding: 0;
  }

  .hero-pc-bottom-left {
    position: absolute;
    bottom: 35px;
    left: 45px;
    text-align: left;
    z-index: 2;
    background: none;
    padding: 0;
    max-width: 520px;
  }
  .hero-pc-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: #ffffff;
    margin: 0 0 6px 0;
    text-shadow: 0 2px 6px rgba(0,0,0,0.9);
    line-height: 1.5;
  }
  .hero-pc-text:last-child {
    margin-bottom: 0;
  }

  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1;
  }
}


/* メインコンテンツ共通 */
main {
  max-width: 900px;
  margin: 40px auto;
  background: #fff;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
section {
  margin-bottom: 50px;
}
section h2 {
  border-bottom: 2px solid #007bff;
  padding-bottom: 10px;
  margin-bottom: 25px;
  color: #222;
}
section h3 {
  color: #0056b3;
  margin-top: 25px;
  font-size: 1.1rem;
}

/* 特徴ボックス */
.feature-box {
  background: #f8fbff;
  border-left: 4px solid #007bff;
  padding: 20px;
  border-radius: 0 8px 8px 0;
  margin-bottom: 20px;
}
.feature-box h3 {
  margin-top: 0;
  color: #0056b3;
}

/* 講師紹介のデザイン */
.instructor-card {
  display: flex;
  align-items: center;
  gap: 30px;
  background: #f0f7ff;
  padding: 25px;
  border-radius: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.instructor-img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  flex-shrink: 0;
}
.instructor-text h3 {
  margin-top: 0;
  margin-bottom: 10px;
  color: #0056b3;
}
.instructor-text .kana {
  font-size: 0.9rem;
  color: #666;
  font-weight: normal;
}
.instructor-profile {
  margin: 0;
  color: #444;
}

/* 証書写真のデザイン */
.certificate-box {
  text-align: center;
  background: #fff;
  border: 1px solid #e0e0e0;
  padding: 20px;
  border-radius: 10px;
  margin-top: 20px;
}
.certificate-img {
  max-width: 100%;
  height: auto;
  max-height: 350px;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.certificate-caption {
  font-size: 0.9rem;
  color: #666;
  margin-top: 10px;
  margin-bottom: 0;
}

/* スタジオ雰囲気の写真デザイン */
.studio-section {
  text-align: center;
}
.studio-img {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-top: 15px;
}

/* 料金カテゴリ・リスト共通 */
.price-category {
  background: #fdfdfd;
  border: 1px solid #eaeaea;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 15px;
}
.price-category p {
  margin: 0;
  font-size: 0.95rem;
}
.price-value-black {
  color: #333;
  margin-right: 15px;
  font-size: 1.1rem;
}
.price-note-black {
  color: #333;
  font-weight: normal;
}

/* 月会費の表形式のデザイン */
.price-table-wrap {
  background: #fdfdfd;
  border: 1px solid #eaeaea;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 15px;
}
.price-table {
  width: 100%;
  border-collapse: collapse;
}
.price-table th, .price-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid #eee;
  color: #333;
  font-size: 0.95rem;
}
.price-table th {
  font-weight: bold;
  color: #0056b3;
  width: 110px;
  border-bottom: 1px solid #eee;
}
.price-col {
  text-align: right;
  font-weight: bold;
}
.price-table tr:last-child th, 
.price-table tr:last-child td {
  border-bottom: none;
}
.price-subtext {
  margin-top: 15px !important;
  color: #555;
  font-size: 0.9rem;
  margin-bottom: 0;
}

.notes-box {
  background: #fffdf5;
  border: 1px solid #ffeeba;
  padding: 20px;
  border-radius: 8px;
  margin-top: 25px;
}
.notes-box ul {
  padding-left: 20px;
  margin-bottom: 0;
}
.notes-box li {
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: #555;
}

/* スケジュール表のデザイン */
.schedule-table-wrap {
  overflow-x: auto;
}
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}
.schedule-table th, .schedule-table td {
  border: 1px solid #ddd;
  padding: 12px 15px;
  text-align: left;
}
.schedule-table th {
  background: #0056b3;
  color: #fff;
  width: 60px;
  text-align: center;
}
.schedule-table td {
  background: #fff;
}