* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --pink-bg: #FFF0F5;
  --pink-light: #FFE4EC;
  --pink-main: #FFB7C5;
  --pink-accent: #FF8FAB;
  --pink-dark: #FF6B8A;
  --text-dark: #5C4A4A;
  --text-medium: #8B6E6E;
  --white: #FFFFFF;
  --shadow: 0 4px 15px rgba(255, 143, 171, 0.2);
  --radius: 16px;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: var(--pink-bg);
  color: var(--text-dark);
  line-height: 1.6;
}

/* ヘッダー */
.header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(255, 143, 171, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon { font-size: 2rem; }

.logo-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--pink-dark);
}

.logo-text p {
  font-size: 0.75rem;
  color: var(--text-medium);
}

.nav { display: flex; gap: 20px; }

.nav a {
  color: var(--text-dark);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover { color: var(--pink-dark); }

/* ヒーロー */
.hero {
  background: linear-gradient(135deg, #FFE4EC 0%, #FFF0F5 60%, #FFE4EC 100%);
  padding: 70px 24px;
  text-align: center;
}

.hero-content h2 {
  font-size: 2.2rem;
  color: var(--pink-dark);
  margin-bottom: 14px;
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--text-medium);
  margin-bottom: 32px;
}

.hero-links {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 107, 138, 0.35);
}

.btn-youtube { background: var(--pink-dark); color: white; }
.btn-blog {
  background: var(--white);
  color: var(--pink-dark);
  border: 2px solid var(--pink-main);
}
.btn-amazon {
  background: #FF9900;
  color: white;
  padding: 10px 24px;
  font-size: 0.9rem;
}

/* セクション共通 */
.section { padding: 64px 24px; }
.section-alt { background: var(--pink-light); }

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.6rem;
  color: var(--pink-dark);
  text-align: center;
  margin-bottom: 8px;
}

.section-desc {
  text-align: center;
  color: var(--text-medium);
  margin-bottom: 36px;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* カテゴリカード */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.category-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text-dark);
  transition: transform 0.25s, box-shadow 0.25s;
  display: block;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 28px rgba(255, 143, 171, 0.35);
}

.category-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.category-thumbnail-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--pink-light), var(--pink-main));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.category-info { padding: 12px 14px; }

.category-name {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.4;
}

.category-count {
  font-size: 0.75rem;
  color: var(--text-medium);
}

/* 書籍 */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 8px;
  justify-items: center;
}

.book-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  text-align: center;
  max-width: 360px;
  width: 100%;
}

.book-emoji { font-size: 3rem; margin-bottom: 16px; }

.book-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.6;
}

.book-publisher {
  font-size: 0.85rem;
  color: var(--text-medium);
  margin-bottom: 20px;
}

/* SNSリンク */
.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.social-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  text-decoration: none;
  color: var(--text-dark);
  box-shadow: var(--shadow);
  transition: transform 0.25s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.social-card:hover { transform: translateY(-5px); }

.social-icon { font-size: 2.4rem; }
.social-name { font-weight: 700; font-size: 1rem; }
.social-desc { font-size: 0.75rem; color: var(--text-medium); }

.social-card.youtube  { border-top: 4px solid #FF6B8A; }
.social-card.blog     { border-top: 4px solid #FFB7C5; }
.social-card.instagram{ border-top: 4px solid #FF8FAB; }
.social-card.suzuri   { border-top: 4px solid #FFAABB; }

/* リクエストフォーム */
.form-container {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.form-placeholder {
  background: var(--white);
  border-radius: var(--radius);
  padding: 56px 32px;
  color: var(--text-medium);
  box-shadow: var(--shadow);
  font-size: 1.05rem;
}

/* フッター */
.footer {
  background: var(--pink-dark);
  color: var(--white);
  text-align: center;
  padding: 40px 24px;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--pink-light);
  text-decoration: none;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}

.footer-links a:hover { opacity: 0.75; }

.footer-copy {
  font-size: 0.8rem;
  opacity: 0.75;
}

/* ローディング */
.loading {
  text-align: center;
  color: var(--text-medium);
  padding: 48px;
  grid-column: 1 / -1;
  font-size: 1rem;
}

/* スマホ対応 */
@media (max-width: 768px) {
  .nav { display: none; }
  .hero-content h2 { font-size: 1.6rem; }
  .section-title { font-size: 1.3rem; }
  .category-grid {
    grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
    gap: 14px;
  }
  .social-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}