/* ============================================================
   Kids-Phonics ページ｜スタイルシート
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&family=Zen+Maru+Gothic:wght@500;700;900&display=swap');

:root {
  --kp-main: #7CB518;       /* 元気な黄緑（ブランドカラー・アクセント） */
  --kp-main-light: #E4F3C9; /* 黄緑の淡色（背景・タグ用） */
  --kp-header-bg: #DDF4F4;  /* ヘッダー背景（淡い水色） */
  --kp-accent: #FFB627;     /* 元気なオレンジ・イエロー（Rhythm Chants） */
  --kp-accent2: #E8483F;    /* 差し色（Chants） */
  --kp-accent3: #4EC0C0;    /* 差し色2（絵本） */
  --kp-cream: #FFFDF8;      /* 背景クリーム */
  --kp-ink: #2B2640;        /* 本文インク */
  --kp-white: #ffffff;

  --kp-radius: 20px;
  --kp-shadow: 0 6px 16px rgba(43, 38, 64, 0.10);

  /* letters タグ用 同系色5色バリエーション */
  --kp-tag-1: #7CB518;
  --kp-tag-2: #9BCB3C;
  --kp-tag-3: #5FA315;
  --kp-tag-4: #B7D94C;
  --kp-tag-5: #4C8A0F;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--kp-cream);
  color: var(--kp-ink);
  font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif;
  line-height: 1.7;
}

h1, h2, h3, h4, .kp-num, .kp-en {
  font-family: 'Baloo 2', 'Zen Maru Gothic', sans-serif;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ---------- ヘッダー（ロゴのみ） ---------- */
.kp-header {
  background: var(--kp-header-bg);
  border-bottom: 6px solid var(--kp-main);
  padding: 10px 20px;
  text-align: center;
}
.kp-header a { display: inline-block; }
.kp-header img {
  height: 114px;
  margin: 0 auto;
}
/* 一覧ページはロゴをやや大きく表示 */
body.kp-page-list .kp-header img {
  height: 150px;
}
.kp-header .kp-logo-fallback {
  color: #fff;
  font-family: 'Baloo 2', sans-serif;
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: 0.5px;
}
.kp-header .kp-logo-fallback span { display: block; font-size: 0.95rem; font-weight: 500; }

/* ---------- 共通コンテナ ---------- */
.kp-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 18px 60px;
}

/* ---------- 一覧ページ ---------- */
.kp-hero {
  text-align: center;
  margin-bottom: 28px;
}
.kp-hero img.kp-title-img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 10px;
}
.kp-hero p {
  margin: 0;
  color: #6b6580;
  font-size: 0.95rem;
  line-height: 1.6;
}
.kp-hero p.kp-hero-en {
  font-size: 0.85rem;
  color: #8a86a0;
}

.kp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 18px;
}

.kp-card {
  border-radius: var(--kp-radius);
  overflow: hidden;
  box-shadow: var(--kp-shadow);
  border: 3px solid var(--kp-main-light);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  display: block;
}
.kp-card img {
  width: 100%;
  display: block;
}
.kp-card:hover {
  transform: translateY(-4px) rotate(-0.5deg);
  box-shadow: 0 12px 24px rgba(43, 38, 64, 0.16);
  border-color: var(--kp-main);
}

/* ---------- Groupページ ---------- */
.kp-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 253, 248, 0.95);
  backdrop-filter: blur(4px);
  border-bottom: 3px solid var(--kp-main-light);
  overflow-x: auto;
  white-space: nowrap;
}
.kp-topbar-inner {
  display: flex;
  gap: 6px;
  padding: 10px 16px;
  max-width: 900px;
  margin: 0 auto;
}
.kp-topbar a {
  flex: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 700;
}
.kp-topbar a:hover { filter: brightness(0.93); }

.kp-topbar a.kp-tab--handclapping { background: #F1F8E3; color: #5FA315; }
.kp-topbar a.kp-tab--rhythm       { background: #FFF6E4; color: #C97E00; }
.kp-topbar a.kp-tab--chants       { background: #FDEDEC; color: var(--kp-accent2); }
.kp-topbar a.kp-tab--books        { background: #EAF8F8; color: #1F8C8C; }

.kp-progress {
  text-align: center;
  font-family: 'Baloo 2', sans-serif;
  font-weight: 700;
  color: var(--kp-main);
  font-size: 0.9rem;
  margin: 18px 0 4px;
}

.kp-banner {
  margin: 4px 0 24px;
}
.kp-banner img {
  width: 100%;
  border-radius: var(--kp-radius);
  box-shadow: var(--kp-shadow);
  display: block;
}

.kp-section {
  border-radius: var(--kp-radius);
  padding: 22px;
  margin-bottom: 22px;
  box-shadow: var(--kp-shadow);
}
.kp-section h3 {
  margin: 0 0 16px;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.kp-section h3 .kp-icon { font-size: 1.3rem; }

.kp-section--handclapping { background: #F1F8E3; border: 2px solid var(--kp-main); }
.kp-section--handclapping h3 { color: var(--kp-main); }

.kp-section--rhythm { background: #FFF6E4; border: 2px solid var(--kp-accent); }
.kp-section--rhythm h3 { color: #C97E00; }

.kp-section--chants { background: #FDEDEC; border: 2px solid var(--kp-accent2); }
.kp-section--chants h3 { color: var(--kp-accent2); }

.kp-section--books { background: #EAF8F8; border: 2px solid var(--kp-accent3); }
.kp-section--books h3 { color: #1F8C8C; }

.kp-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.kp-video-single {
  max-width: 480px;
  margin: 0 auto;
}

.kp-video-card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 3px 10px rgba(43,38,64,0.08);
}
.kp-video-card .kp-video-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #ddd;
}
.kp-video-card iframe,
.kp-video-card .kp-video-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.kp-video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eee;
  color: #999;
  font-size: 0.85rem;
}
.kp-video-card .kp-video-caption {
  padding: 10px 12px;
}
.kp-video-card .kp-letter-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: transparent;
  border: 2px solid currentColor;
  font-family: 'Baloo 2', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1;
  margin-right: 6px;
  vertical-align: middle;
}
.kp-video-card .kp-title-en {
  font-weight: 700;
  font-size: 0.95rem;
}
.kp-video-card .kp-title-ja {
  font-size: 0.85rem;
  color: #6b6580;
  margin-top: 2px;
}

.kp-book-card .kp-book-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-top: 8px;
}
.kp-book-card .kp-buy-link {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--kp-accent3);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
}
.kp-book-card .kp-buy-link:hover { opacity: 0.85; }

/* ---------- 前後ナビ ---------- */
.kp-pagernav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 30px;
}
.kp-pagernav a, .kp-pagernav span {
  flex: 1;
  text-align: center;
  padding: 14px 10px;
  border-radius: var(--kp-radius);
  background: var(--kp-main);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}
.kp-pagernav span {
  background: #eee;
  color: #aaa;
}
.kp-pagernav a:hover { background: #5FA315; }

.kp-back-to-list {
  text-align: center;
  margin-top: 18px;
}
.kp-back-to-list a {
  font-weight: 700;
  color: var(--kp-main);
  border-bottom: 2px solid var(--kp-main);
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 480px) {
  .kp-header img { height: 64px; }
  body.kp-page-list .kp-header img { height: 84px; }
  .kp-hero img.kp-title-img { max-width: 320px; }
  .kp-section { padding: 16px; }
}