/* HOWLAB design system v1.0
   配色：Knowledge Blue / Spark Yellow / Curiosity Coral / Notebook Cream / Ink Gray / Soft Mint
   フォント：Klee One（H1/H2）/ BIZ UDPGothic（本文）/ Zen Kaku Gothic New（うんちく）/ Outfit（数字）
*/

/* ========== TOKENS ========== */
:root {
  --hl-blue:    #1E3A5F;
  --hl-yellow:  #FFC93C;
  --hl-coral:   #FF7A6B;
  --hl-cream:   #FFF8F2;
  --hl-cream2:  #FFE9D6;
  --hl-ink:     #2C3E50;
  --hl-ink2:    #5A6473;
  --hl-mint:    #A8E6CF;
  --hl-line:    #E7E2DA;
  --hl-card:    #FFFFFF;

  --fs-base:    clamp(17px, 1.05rem + 0.3vw, 19px);
  --fs-kid:     clamp(19px, 1.15rem + 0.4vw, 21px);
  --fs-unchiku: clamp(16px, 1.00rem + 0.2vw, 18px);
  --fs-deep:    clamp(16px, 1.00rem + 0.2vw, 18px);
  --fs-h1:      clamp(28px, 1.80rem + 1.2vw, 40px);
  --fs-h2:      clamp(22px, 1.30rem + 0.8vw, 28px);
  --fs-3sec:    clamp(26px, 1.60rem + 1.5vw, 38px);
  --lh-kid:     1.95;
  --lh-body:    1.85;
  --ls-body:    0.04em;
  --mb-para:    1.4em;

  --card-shadow: 0 1px 0 var(--hl-line), 0 24px 60px -32px rgba(30,58,95,.20);
  --card-shadow-hover: 0 1px 0 var(--hl-line), 0 24px 60px -24px rgba(30,58,95,.32);
  --radius-card: 16px;
  --radius-pill: 999px;
  --maxw:       780px;
  --maxw-wide:  1080px;
}

/* ========== RESET ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ========== BASE ========== */
body {
  font-family: 'BIZ UDPGothic', 'Hiragino Sans', 'Yu Gothic', system-ui, sans-serif;
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  letter-spacing: var(--ls-body);
  color: var(--hl-ink);
  background: var(--hl-cream);
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  /* 日本語禁則：句読点・閉じ括弧が行頭に来ないようにする */
  line-break: strict;
  word-break: normal;
  overflow-wrap: anywhere;
}
p, li {
  text-wrap: pretty;
  /* Chrome等が対応：日本語の文節単位で改行候補を選ぶ。未対応ブラウザでは無視される */
  word-break: auto-phrase;
}
h1, h2, h3 {
  font-family: 'Klee One', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  color: var(--hl-blue);
  text-wrap: balance;
  line-height: 1.35;
  /* 見出しはフレーズ単位の改行を優先 */
  word-break: keep-all;
  overflow-wrap: break-word;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: 1.2em; }
.num, .stat { font-family: 'Outfit', 'Inter', sans-serif; font-variant-numeric: tabular-nums; }

/* ========== HEADER ========== */
.site-header {
  background: var(--hl-cream);
  border-bottom: 1px solid var(--hl-line);
  padding: 14px 20px;
}
.site-header .inner {
  max-width: var(--maxw-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Klee One', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--hl-blue);
  letter-spacing: 0.06em;
}
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--hl-blue);
  color: var(--hl-yellow);
  display: inline-grid;
  place-items: center;
  font-size: 22px;
  font-weight: 700;
}
.brand-tagline {
  font-family: 'BIZ UDPGothic', sans-serif;
  font-size: 13px;
  font-weight: 400;
  color: var(--hl-ink2);
  letter-spacing: 0.05em;
  margin-left: 8px;
}
.site-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--hl-ink);
  background: transparent;
  transition: background .15s, color .15s;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-nav a:hover, .site-nav a:focus-visible {
  background: var(--hl-cream2);
  color: var(--hl-blue);
}

/* ========== LAYOUT ========== */
main { padding: 28px 16px 80px; }
.wrap   { max-width: var(--maxw);      margin: 0 auto; }
.wrap-w { max-width: var(--maxw-wide); margin: 0 auto; }

/* ========== HERO ========== */
.hero {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 28px 24px 24px;
  margin-bottom: 18px;
  box-shadow: var(--card-shadow);
}
.hero .crumb {
  font-size: 13px;
  color: var(--hl-ink2);
  margin-bottom: 12px;
  display: flex; flex-wrap: wrap; gap: 6px;
}
.hero .crumb a { color: var(--hl-blue); text-decoration: underline; text-underline-offset: 3px; }
.hero h1 { margin-bottom: 14px; }
.hero .meta {
  font-size: 13px;
  color: var(--hl-ink2);
  display: flex; flex-wrap: wrap; gap: 14px;
}
.hero .meta .pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px;
  background: var(--hl-cream);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-pill);
}

/* ========== 3秒でわかる（Spark Yellow バッジ） ========== */
.three-sec-card {
  background: linear-gradient(135deg, var(--hl-yellow) 0%, #FFD96B 100%);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
  position: relative;
}
.three-sec-card::before {
  content: "3秒で わかる";
  position: absolute;
  top: -12px; left: 24px;
  background: var(--hl-blue);
  color: var(--hl-yellow);
  font-family: 'Klee One', serif;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.08em;
}
.three-sec {
  font-family: 'Klee One', serif;
  font-size: var(--fs-3sec);
  font-weight: 700;
  color: var(--hl-blue);
  line-height: 1.4;
  text-wrap: balance;
}

/* ========== 図解パネル ========== */
.diagram-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.diagram-card h2 { margin-bottom: 14px; }
.diagram-card .caption {
  font-size: 14px;
  color: var(--hl-ink2);
  margin-top: 10px;
  text-align: center;
}
.diagram-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--hl-cream);
  border: 2px dashed var(--hl-line);
  border-radius: 12px;
  display: grid; place-items: center;
  color: var(--hl-ink2);
  font-size: 14px;
}

/* ========== LEVEL SWITCHER（3層タブ・sticky） ========== */
.level-switcher {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--hl-cream);
  padding: 14px;
  border-radius: var(--radius-card);
  box-shadow: var(--card-shadow);
  margin: 18px 0;
}
.level-switcher::before {
  content: "読みやすさをえらぼう";
  grid-column: 1 / -1;
  font-family: 'Klee One', serif;
  font-size: 14px;
  color: var(--hl-blue);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.level-switcher button {
  min-height: 64px;
  font-size: clamp(15px, 1rem + 0.3vw, 17px);
  font-family: 'BIZ UDPGothic', sans-serif;
  font-weight: 700;
  border: 2px solid transparent;
  border-radius: 12px;
  background: var(--hl-card);
  color: var(--hl-ink);
  cursor: pointer;
  transition: transform .15s, border-color .15s, background .15s;
  padding: 10px 8px;
  display: grid;
  place-items: center;
  line-height: 1.3;
}
.level-switcher button[data-lv="kid"][aria-selected="true"] {
  border-color: var(--hl-blue);
  background: var(--hl-mint);
  transform: translateY(-2px);
}
.level-switcher button[data-lv="adult"][aria-selected="true"] {
  border-color: var(--hl-blue);
  background: var(--hl-yellow);
  transform: translateY(-2px);
}
.level-switcher button[data-lv="deep"][aria-selected="true"] {
  border-color: var(--hl-blue);
  background: var(--hl-coral);
  color: var(--hl-cream);
  transform: translateY(-2px);
}
.level-switcher button:focus-visible {
  outline: 3px solid var(--hl-coral);
  outline-offset: 2px;
}

/* ========== 3層タブ表示切替 ========== */
body[data-lv="kid"]   .lv-adult, body[data-lv="kid"]   .lv-deep  { display: none; }
body[data-lv="adult"] .lv-kid,   body[data-lv="adult"] .lv-deep  { display: none; }
body[data-lv="deep"]  .lv-kid,   body[data-lv="deep"]  .lv-adult { display: none; }

/* ========== 本文ブロック ========== */
.body-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
  min-height: 480px;  /* CLS抑制 */
}

/* kid */
.kid-body p {
  font-size: var(--fs-kid);
  line-height: var(--lh-kid);
  margin-block: var(--mb-para);
  color: var(--hl-ink);
}
.kid-body p:first-child { margin-top: 0; }
.kid-body p:last-child  { margin-bottom: 0; }
.kid-body ruby rt {
  font-size: 0.55em;
  color: var(--hl-blue);
  font-family: 'BIZ UDPGothic', sans-serif;
  letter-spacing: 0;
}

/* adult / unchiku */
.unchiku {
  font-family: 'Zen Kaku Gothic New', 'BIZ UDPGothic', sans-serif;
  font-size: var(--fs-unchiku);
  line-height: 1.85;
  color: var(--hl-ink);
}
.unchiku p { margin-block: var(--mb-para); }
.unchiku p:first-child { margin-top: 0; }
.unchiku::first-letter {
  font-family: 'Klee One', serif;
  font-size: 2.4em;
  color: var(--hl-coral);
  float: left;
  line-height: 1;
  padding: 6px 8px 0 0;
}

/* deep */
.deep-body { font-size: var(--fs-deep); line-height: 1.85; }
.deep-body h2 {
  font-size: 1.25em;
  margin: 1.5em 0 0.6em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--hl-yellow);
}
.deep-body h2::before {
  content: "🔬 ";
  color: var(--hl-coral);
}
.deep-body p { margin-block: var(--mb-para); color: var(--hl-ink); }

/* ========== タイムライン / データブロック ========== */
.timeline-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.timeline-card h2 { margin-bottom: 16px; }
.timeline {
  display: grid;
  gap: 14px;
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--hl-yellow);
}
.timeline-item { position: relative; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px; top: 8px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--hl-coral);
  border: 2px solid var(--hl-cream);
}
.timeline-when {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--hl-blue);
}
.timeline-what {
  font-size: 15px;
  color: var(--hl-ink);
  margin-top: 2px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.data-table th, .data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--hl-line);
}
.data-table th {
  background: var(--hl-cream);
  font-weight: 700;
  color: var(--hl-blue);
  font-size: 13px;
  letter-spacing: 0.05em;
}

/* ========== ことばのメモ ========== */
.vocab-card {
  background: var(--hl-mint);
  border-radius: var(--radius-card);
  padding: 22px 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.vocab-card h2 {
  font-size: 1.15em;
  margin-bottom: 12px;
  color: var(--hl-blue);
}
.vocab-card h2::before { content: "💡 "; }
.vocab-list { display: grid; gap: 10px; }
.vocab-list dt {
  font-weight: 700;
  color: var(--hl-blue);
}
.vocab-list dd {
  margin: 0 0 4px 0;
  font-size: 15px;
  color: var(--hl-ink);
}

/* ========== FAQ ========== */
.faq-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.faq-card h2 { margin-bottom: 14px; }
.faq-item {
  border-bottom: 1px solid var(--hl-line);
  padding: 14px 0;
}
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-q {
  font-weight: 700;
  color: var(--hl-blue);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  padding: 4px 0;
}
.faq-q::after {
  content: "+";
  color: var(--hl-coral);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  transition: transform .2s;
}
.faq-item[open] .faq-q::after { transform: rotate(45deg); }
.faq-a {
  margin-top: 10px;
  font-size: 15px;
  color: var(--hl-ink);
  line-height: 1.85;
}

/* ========== 関連3問 ========== */
.related-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.related-card h2 { margin-bottom: 14px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.related-item {
  display: block;
  padding: 16px 18px;
  background: var(--hl-cream);
  border: 1px solid var(--hl-line);
  border-radius: 12px;
  color: var(--hl-blue);
  font-weight: 700;
  transition: transform .15s, box-shadow .15s;
  min-height: 64px;
}
.related-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}
.related-item .cat {
  display: block;
  font-size: 12px;
  color: var(--hl-coral);
  font-weight: 400;
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}

/* ========== 学びのタネ（収益導線） ========== */
.seeds-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.seeds-card h2 { margin-bottom: 14px; }
.seeds-card h3 {
  font-family: 'BIZ UDPGothic', sans-serif;
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--hl-ink2);
  text-transform: uppercase;
  margin: 18px 0 10px;
}
.seed-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

/* 問い固有の Amazon 書籍カード */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 8px 0 18px;
}
.book-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  min-height: 84px;
  background: var(--hl-cream);
  border: 1px solid var(--hl-line);
  border-left: 4px solid var(--hl-yellow);
  border-radius: 12px;
  text-decoration: none;
  color: var(--hl-ink);
  transition: background .15s ease, transform .15s ease;
}
.book-card:hover {
  background: #FFFDF7;
  transform: translateY(-1px);
  border-color: var(--hl-blue);
}
.book-card .book-title {
  font-family: 'Zen Kaku Gothic New', 'Hiragino Sans', sans-serif;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.45;
  color: var(--hl-blue);
}
.book-card .book-author {
  font-size: 12px;
  color: var(--hl-ink2);
}
.book-card .book-cta {
  margin-top: auto;
  align-self: flex-end;
  font-size: 13px;
  font-weight: 700;
  color: var(--hl-coral);
}
.seed-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--hl-cream);
  border: 1px solid var(--hl-line);
  border-radius: 10px;
  color: var(--hl-blue);
  font-size: 14px;
  font-weight: 500;
  transition: background .15s, border-color .15s;
  min-height: 48px;
}
.seed-link:hover {
  background: var(--hl-yellow);
  border-color: var(--hl-blue);
  color: var(--hl-blue);
}
.seed-link::before {
  content: "›";
  color: var(--hl-coral);
  font-weight: 700;
}
.seeds-note {
  font-size: 12px;
  color: var(--hl-ink2);
  margin-top: 14px;
}

/* ========== 出典 ========== */
.sources-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 24px;
  margin: 18px 0;
  box-shadow: var(--card-shadow);
}
.sources-card h2 { margin-bottom: 14px; }
.sources-list { counter-reset: src; }
.sources-list li {
  counter-increment: src;
  padding: 12px 0 12px 36px;
  border-bottom: 1px solid var(--hl-line);
  position: relative;
  font-size: 14px;
  color: var(--hl-ink);
}
.sources-list li:last-child { border-bottom: none; }
.sources-list li::before {
  content: "[" counter(src) "]";
  position: absolute;
  left: 0; top: 12px;
  color: var(--hl-blue);
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 13px;
}
.sources-list .org { font-weight: 700; color: var(--hl-blue); display: block; }
.sources-list a { color: var(--hl-coral); text-decoration: underline; text-underline-offset: 2px; word-break: break-all; }

/* ========== カテゴリチップ ========== */
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--hl-cream2);
  color: var(--hl-blue);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

/* ========== AdSense枠 ========== */
.ad-slot {
  margin: 20px 0;
  min-height: 90px;
  background: var(--hl-cream);
  border: 1px dashed var(--hl-line);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--hl-ink2);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.ad-slot::before { content: "Advertisement"; opacity: 0.5; }

/* ========== TOP PAGE（index） ========== */
.hero-top {
  background: linear-gradient(135deg, var(--hl-cream) 0%, var(--hl-cream2) 100%);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 36px 24px;
  margin-bottom: 18px;
  box-shadow: var(--card-shadow);
  text-align: center;
}
.hero-top h1 {
  font-size: clamp(28px, 1.6rem + 1.4vw, 44px);
  letter-spacing: 0.02em;
  line-height: 1.45;
}
/* フレーズ単位で改行制御（句読点が行頭に来ない・フレーズが途中で割れない） */
.phrase {
  display: inline-block;
  white-space: nowrap;
}
.hero-top .lead {
  font-size: clamp(15px, 0.95rem + 0.3vw, 18px);
  color: var(--hl-ink);
  margin: 14px auto 0;
  max-width: 600px;
}
.hero-top .badges {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px;
}
.hero-top .badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
}
.badge-kid    { background: var(--hl-mint);   color: var(--hl-blue); }
.badge-adult  { background: var(--hl-yellow); color: var(--hl-blue); }
.badge-deep   { background: var(--hl-coral);  color: var(--hl-cream); }

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin: 18px 0;
}
.cat-card {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: var(--radius-card);
  padding: 20px;
  text-align: center;
  transition: transform .15s, box-shadow .15s, border-color .15s;
  box-shadow: var(--card-shadow);
  min-height: 140px;
  display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 6px;
}
.cat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--hl-blue);
}
.cat-card .icon { font-size: 36px; line-height: 1; }
.cat-card .name {
  font-family: 'Klee One', serif;
  font-size: 20px;
  color: var(--hl-blue);
  font-weight: 700;
}
.cat-card .desc { font-size: 12px; color: var(--hl-ink2); }

.q-list { display: grid; gap: 12px; }
.q-list-item {
  background: var(--hl-card);
  border: 1px solid var(--hl-line);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: background .15s, border-color .15s;
}
.q-list-item:hover { background: var(--hl-cream); border-color: var(--hl-blue); }
.q-list-item .q-cat {
  font-size: 12px;
  font-weight: 700;
  color: var(--hl-coral);
  letter-spacing: 0.05em;
  min-width: 64px;
}
.q-list-item .q-text {
  flex: 1;
  font-family: 'Klee One', serif;
  font-size: 17px;
  color: var(--hl-blue);
  font-weight: 700;
}
.q-list-item .q-arrow { color: var(--hl-coral); }

.section-title {
  font-family: 'Klee One', serif;
  font-size: 18px;
  color: var(--hl-blue);
  letter-spacing: 0.06em;
  margin: 26px 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::after {
  content: "";
  flex: 1;
  height: 2px;
  background: var(--hl-yellow);
}

/* ========== FOOTER ========== */
.site-footer {
  background: var(--hl-blue);
  color: var(--hl-cream);
  padding: 36px 20px 28px;
  margin-top: 60px;
}
.site-footer .inner {
  max-width: var(--maxw-wide);
  margin: 0 auto;
  text-align: center;
}
.site-footer .logo {
  font-family: 'Klee One', serif;
  font-size: 22px;
  color: var(--hl-yellow);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.site-footer nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 14px 0 18px;
  font-size: 14px;
}
.site-footer nav a {
  color: var(--hl-cream);
  opacity: 0.85;
  padding: 6px 10px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-footer nav a:hover { opacity: 1; color: var(--hl-yellow); }
.site-footer .disclaimer {
  font-size: 12px;
  color: rgba(255,248,242,0.6);
  max-width: 640px;
  margin: 0 auto 12px;
  line-height: 1.7;
}
.site-footer .copy {
  font-size: 12px;
  color: rgba(255,248,242,0.5);
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.06em;
}
.kappy-mark { color: var(--hl-yellow); }

/* ========== COOKIE BANNER ========== */
#cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: rgba(30,58,95,0.97);
  color: var(--hl-cream);
  border-top: 2px solid var(--hl-yellow);
  padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  z-index: 1000;
  font-size: 13px;
  line-height: 1.6;
}
#cookie-banner.hidden { display: none; }
#cookie-banner a { color: var(--hl-yellow); text-decoration: underline; }
.cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }
.cookie-btn {
  padding: 9px 18px;
  border-radius: 8px;
  border: none;
  font-size: 13px;
  font-weight: 700;
  font-family: 'BIZ UDPGothic', sans-serif;
  min-height: 44px;
}
.cookie-accept { background: var(--hl-yellow); color: var(--hl-blue); }
.cookie-reject { background: transparent; color: var(--hl-cream); border: 1px solid var(--hl-cream); }

/* ========== A11Y / TOUCH ========== */
a, button, summary, .faq-q, .level-switcher button { min-height: 48px; }
:focus-visible {
  outline: 3px solid var(--hl-coral);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 480px) {
  .kid-body p { letter-spacing: 0.02em; }
  .site-header .inner { gap: 8px; }
  .brand-tagline { display: none; }
  .level-switcher { padding: 12px; }
  .level-switcher button { min-height: 56px; font-size: 14px; }
  .hero, .body-card, .diagram-card, .timeline-card, .vocab-card, .faq-card, .related-card, .seeds-card, .sources-card { padding: 20px 16px; }
  #cookie-banner { flex-direction: column; align-items: flex-start; padding: 14px 16px; }
}

/* ========== PRINT（家庭学習プリント対応） ========== */
@media print {
  body { background: #fff; color: #000; }
  .site-header, .site-footer, .level-switcher, .ad-slot, #cookie-banner, .seeds-card, .related-card { display: none !important; }
  .lv-kid, .lv-adult, .lv-deep { display: block !important; }
  .hero, .body-card, .diagram-card, .timeline-card, .vocab-card, .faq-card, .sources-card {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  a { color: #000; text-decoration: underline; }
  h1, h2 { color: #000; }
  .three-sec-card { background: #FFF8DC; }
}

/* ========== MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}