/* =============================================
   秘密の部屋 — secret.css
   国語辞典世界観 × 謎解き
   ============================================= */

:root {
  --clr-paper:       #f0e8cc;
  --clr-paper-dk:    #e4d8b0;
  --clr-paper-deep:  #d8cb98;
  --clr-ink:         #1a120a;
  --clr-ink-mid:     #3a2c18;
  --clr-ink-light:   #6b5538;
  --clr-vermilion:   #c0392b;
  --clr-cobalt:      #1a4a7a;
  --clr-gold:        #9a7a32;
  --clr-rule:        #c0a870;
  --clr-rule-lt:     #d8c898;
  --clr-muted:       #a08060;
  /* 秘密ページ専用 */
  --clr-secret:      #4a1030;
  --clr-secret-lt:   rgba(74, 16, 48, 0.12);

  --font-m: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
  --font-e: 'Libre Baskerville', Georgia, serif;

  --ease-book: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-m);
  background-color: var(--clr-paper);
  color: var(--clr-ink);
  min-height: 100svh;
  overflow-x: hidden;
  position: relative;
}

/* ─── 横罫線テクスチャ ─── */
.paper-lines {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 27px,
    rgba(139,110,60,0.08) 27px,
    rgba(139,110,60,0.08) 28px
  );
}

/* ─── 浮遊ワード ─── */
.float-words {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.fw {
  position: absolute;
  font-family: var(--font-m);
  color: var(--clr-ink);
  white-space: nowrap;
  opacity: 0;
  /* animation: floatDrift linear infinite; */
  /* 個別設定はHTML側のクラスで上書き */
}

/* 各ワードの位置・サイズ・速度をランダムに散らす */
.fw-1  { font-size: clamp(0.7rem,1.4vw,0.9rem);  left:  8%; top: 20%; opacity:0.18; animation-duration:18s; animation-delay:-3s;  }
.fw-2  { font-size: clamp(1.8rem,4vw,2.8rem);     left: 75%; top: 15%; opacity:0.12; animation-duration:22s; animation-delay:-7s;  font-weight:700; color:var(--clr-secret); }
.fw-3  { font-size: clamp(0.6rem,1.2vw,0.78rem);  left: 40%; top: 55%; opacity:0.14; animation-duration:26s; animation-delay:-1s;  }
.fw-4  { font-size: clamp(1.2rem,2.5vw,1.8rem);   left: 20%; top: 70%; opacity:0.10; animation-duration:20s; animation-delay:-5s;  font-weight:700; }
.fw-5  { font-size: clamp(0.7rem,1.3vw,0.85rem);  left: 88%; top: 45%; opacity:0.16; animation-duration:24s; animation-delay:-9s;  }
.fw-6  { font-size: clamp(2rem,4.5vw,3rem);        left:  5%; top: 45%; opacity:0.08; animation-duration:30s; animation-delay:-12s; font-weight:700; color:var(--clr-secret); }
.fw-7  { font-size: clamp(1.5rem,3vw,2.2rem);      left: 60%; top: 75%; opacity:0.10; animation-duration:28s; animation-delay:-4s;  font-weight:700; color:var(--clr-secret); }
.fw-8  { font-size: clamp(0.65rem,1.2vw,0.8rem);   left: 30%; top: 12%; opacity:0.14; animation-duration:16s; animation-delay:-6s;  }
.fw-9  { font-size: clamp(0.6rem,1.1vw,0.75rem);   left: 55%; top: 30%; opacity:0.12; animation-duration:21s; animation-delay:-2s;  }
.fw-10 { font-size: clamp(0.7rem,1.3vw,0.88rem);   left: 82%; top: 65%; opacity:0.15; animation-duration:19s; animation-delay:-8s;  }
.fw-11 { font-size: clamp(0.65rem,1.2vw,0.8rem);   left: 15%; top: 88%; opacity:0.12; animation-duration:23s; animation-delay:-10s; }
.fw-12 { font-size: clamp(0.9rem,1.8vw,1.1rem);    left: 70%; top:  8%; opacity:0.13; animation-duration:17s; animation-delay:-14s; }

/* @keyframes floatDrift {
  0%   { transform: translateY(0)    rotate(0deg);   }
  33%  { transform: translateY(-12px) rotate(0.8deg); }
  66%  { transform: translateY(8px)   rotate(-0.5deg);}
  100% { transform: translateY(0)    rotate(0deg);   }
} */

/* ─── ヘッダー ─── */
header.secret-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--clr-secret);
  border-bottom: 3px solid var(--clr-vermilion);
  padding: clamp(0.6rem,1.8vw,1rem) clamp(1rem,4vw,2rem);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 3px 20px rgba(0,0,0,0.4);
}

.header-label {
  font-size: clamp(0.48rem,0.9vw,0.58rem);
  letter-spacing: 0.4em;
  color: rgba(240,232,204,0.5);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
}

.header-center {
  text-align: center;
}

.header-center h1 {
  font-size: clamp(1rem,2.8vw,1.4rem);
  font-weight: 700;
  color: var(--clr-paper);
  letter-spacing: 0.2em;
  line-height: 1.3;
}

.header-center h1 rt {
  font-size: 0.5em;
  color: rgba(240,232,204,0.6);
  letter-spacing: 0.15em;
}

.header-sub {
  font-family: var(--font-e);
  font-style: italic;
  font-size: clamp(0.55rem,1vw,0.65rem);
  color: rgba(192,168,112,0.6);
  letter-spacing: 0.1em;
  margin-top: 0.15rem;
}

.home-btn {
  font-size: clamp(0.6rem,1.1vw,0.7rem);
  color: rgba(192,168,112,0.7);
  text-decoration: none;
  border: 1px solid rgba(192,168,112,0.4);
  border-radius: 2rem;
  padding: 0.28em 0.75em;
  white-space: nowrap;
  transition: background 0.18s, color 0.18s;
  letter-spacing: 0.06em;
}
.home-btn:hover {
  background: rgba(192,168,112,0.2);
  color: var(--clr-paper);
}

/* ─── メイン ─── */
main {
  position: relative;
  z-index: 5;
  max-width: 48rem;
  margin: 0 auto;
  padding: clamp(2rem,5vw,4rem) clamp(1rem,5vw,2.5rem) clamp(3rem,8vw,6rem);
}

/* ─── 扉の装飾 ─── */
.door-deco {
  text-align: center;
  margin-bottom: clamp(2.5rem,6vw,4.5rem);
}

.door-frame {
  display: inline-block;
  width: clamp(4rem,12vw,7rem);
  height: clamp(6rem,16vw,10rem);
  border: 2px solid var(--clr-ink-mid);
  border-radius: 40% 40% 0 0 / 20% 20% 0 0;
  position: relative;
  margin-bottom: 0.85rem;
  background: linear-gradient(
    to bottom,
    rgba(74,16,48,0.06) 0%,
    transparent 100%
  );
  box-shadow:
    inset 0 0 0 4px var(--clr-paper),
    inset 0 0 0 5px rgba(74,16,48,0.15);
}

.door-inner {
  position: absolute;
  inset: 8px;
  border: 1px solid var(--clr-rule);
  border-radius: 38% 38% 0 0 / 18% 18% 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.door-keyhole {
  font-size: clamp(1.2rem,3vw,1.8rem);
  color: var(--clr-secret);
  opacity: 0.6;
  animation: keyholeGlow 3s ease-in-out infinite;
}

@keyframes keyholeGlow {
  0%,100% { opacity: 0.4; }
  50%      { opacity: 0.8; }
}

.door-caption {
  font-size: clamp(0.65rem,1.2vw,0.78rem);
  color: var(--clr-muted);
  letter-spacing: 0.2em;
  font-style: italic;
  font-family: var(--font-e);
}

/* ─── セクション区切り ─── */
.section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(1.5rem,4vw,2.5rem);
}
.section-divider::before,
.section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-rule), transparent);
}
.divider-text {
  font-size: clamp(0.7rem,1.4vw,0.85rem);
  letter-spacing: 0.5em;
  color: var(--clr-gold);
  font-weight: 700;
  white-space: nowrap;
}

/* ─── ヒントブロック ─── */
.hints-section {
  margin-bottom: clamp(2.5rem,6vw,4rem);
}

.hint-block {
  border: 1px solid var(--clr-rule);
  border-left: 4px solid var(--clr-rule);
  background: var(--clr-paper);
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: border-left-color 0.25s var(--ease-book);
}
.hint-block:hover {
  border-left-color: var(--clr-secret);
}
.hint-block--plain {
  border-left-color: var(--clr-ink-mid);
}
.hint-block--puzzle {
  border-left-color: var(--clr-gold);
}

.hint-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--clr-paper-dk);
  border-bottom: 1px solid var(--clr-rule-lt);
}

.hint-num {
  font-size: clamp(0.6rem,1.1vw,0.7rem);
  font-weight: 700;
  color: var(--clr-gold);
  letter-spacing: 0.2em;
}

.hint-tag {
  font-size: clamp(0.52rem,0.95vw,0.62rem);
  color: var(--clr-muted);
  border: 1px solid var(--clr-rule-lt);
  padding: 0.1em 0.5em;
  border-radius: 2px;
  letter-spacing: 0.08em;
}

.hint-body {
  padding: clamp(0.85rem,2.5vw,1.4rem) clamp(1rem,3vw,1.6rem);
}

.hint-text {
  font-size: clamp(0.82rem,1.6vw,0.95rem);
  line-height: 2;
  color: var(--clr-ink-mid);
  letter-spacing: 0.06em;
}

.hint-text em {
  font-style: normal;
  font-weight: 700;
  color: var(--clr-secret);
  border-bottom: 1px solid currentColor;
}

.hint-note {
  font-size: clamp(0.58rem,1vw,0.68rem);
  color: var(--clr-muted);
  margin-top: 0.5rem;
  letter-spacing: 0.06em;
  font-style: italic;
  font-family: var(--font-e);
}

/* ─── ヒント②：墨消しテキスト ─── */
.censored-text {
  font-size: clamp(0.82rem,1.6vw,0.95rem);
  line-height: 2.2;
  color: var(--clr-ink-mid);
  letter-spacing: 0.06em;
}

.ink-blot {
  display: inline-block;
  background: var(--clr-ink);
  color: var(--clr-ink); /* 同色で完全に隠す */
  border-radius: 2px;
  padding: 0 0.1em;
  position: relative;
  cursor: default;
  user-select: none;
  /* ごく微かに揺れる */
  animation: inkPulse 4s ease-in-out infinite;
  font-weight: 700;
  min-width: 1.2em;
  text-align: center;
}

@keyframes inkPulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.85; }
}

.censored-note {
  display: block;
  margin-top: 0.6rem;
}

/* ─── ヒント④：隠し文字 ─── */
.hidden-text-area {
  margin-top: 0.75rem;
}

.hidden-reveal {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.1rem;
  padding: 0.75rem 1.1rem;
  background: var(--clr-paper-dk);
  border: 1px dashed var(--clr-rule);
  cursor: pointer;
  margin-top: 0.4rem;
  min-width: 12rem;
  min-height: 2.5rem;
  align-items: center;
  transition: background 0.18s;
  border-radius: 2px;
}
.hidden-reveal:hover {
  background: var(--clr-paper-deep);
}
.hidden-reveal:focus-visible {
  outline: 2px solid var(--clr-cobalt);
  outline-offset: 2px;
}

.hidden-char {
  font-size: clamp(0.9rem,1.8vw,1.1rem);
  font-weight: 700;
  /* 背景色と同色で隠す */
  color: var(--clr-paper-dk);
  letter-spacing: 0.1em;
  transition: color 0.4s var(--ease-book);
  user-select: none;
}

.hidden-separator {
  font-size: clamp(0.7rem,1.3vw,0.85rem);
  color: var(--clr-paper-dk);
  transition: color 0.4s var(--ease-book);
  user-select: none;
}

/* 答えの文字は少し遅れて赤で出現 */
.hidden-char.answer-char {
  color: var(--clr-paper-dk);
  transition: color 0.6s var(--ease-book) 0.3s;
}

/* 表示状態 */
.hidden-reveal.revealed .hidden-char {
  color: var(--clr-ink);
}
.hidden-reveal.revealed .hidden-separator {
  color: var(--clr-muted);
}
.hidden-reveal.revealed .hidden-char.answer-char {
  color: var(--clr-secret);
  font-size: clamp(1rem,2vw,1.2rem);
}

/* ─── ヒント⑤：一枚謎プレースホルダー ─── */
.puzzle-slot {
  min-height: 12rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.puzzle-placeholder {
  text-align: center;
  color: var(--clr-muted);
}

.placeholder-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.5rem;
  opacity: 0.3;
}

.placeholder-text {
  font-size: clamp(0.72rem,1.3vw,0.85rem);
  letter-spacing: 0.15em;
  margin-bottom: 0.3rem;
}

.puzzle-img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--clr-rule);
}

/* ─── 答え入力フォーム ─── */
.answer-section {
  /* フォームがページ下部で目立つよう余白多め */
}

.answer-block {
  background: var(--clr-paper-dk);
  border: 1px solid var(--clr-rule);
  border-top: 3px solid var(--clr-secret);
  padding: clamp(1.25rem,4vw,2.5rem) clamp(1.25rem,4vw,2.5rem);
}

.answer-desc {
  font-size: clamp(0.78rem,1.5vw,0.9rem);
  color: var(--clr-ink-mid);
  line-height: 2;
  letter-spacing: 0.06em;
  margin-bottom: clamp(1rem,3vw,1.75rem);
  text-align: center;
}

.input-label {
  display: block;
  font-size: clamp(0.6rem,1.1vw,0.7rem);
  color: var(--clr-gold);
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.input-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.answer-input {
  flex: 1;
  padding: 0.65rem 1rem;
  font-family: var(--font-m);
  font-size: clamp(1rem,2vw,1.2rem);
  letter-spacing: 0.2em;
  background: var(--clr-paper);
  border: 1.5px solid var(--clr-rule);
  border-radius: 2px;
  color: var(--clr-ink);
  outline: none;
  text-align: center;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.answer-input:focus {
  border-color: var(--clr-secret);
  box-shadow: 0 0 0 3px var(--clr-secret-lt);
}

.submit-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  background: var(--clr-secret);
  color: var(--clr-paper);
  border: none;
  border-radius: 2px;
  font-family: var(--font-m);
  font-size: clamp(0.75rem,1.4vw,0.88rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: opacity 0.18s, transform 0.12s;
}
.submit-btn:hover  { opacity: 0.85; }
.submit-btn:active { transform: scale(0.97); }

.submit-icon {
  font-size: 0.7em;
  opacity: 0.8;
}

.input-hint {
  font-size: clamp(0.55rem,0.95vw,0.63rem);
  color: var(--clr-muted);
  margin-top: 0.4rem;
  letter-spacing: 0.06em;
  font-style: italic;
  font-family: var(--font-e);
}

/* ─── 結果表示 ─── */
.result {
  margin-top: 1.25rem;
  min-height: 0;
  overflow: hidden;
  transition: min-height 0.3s var(--ease-book);
}

.result-inner {
  font-size: clamp(0.82rem,1.6vw,0.95rem);
  letter-spacing: 0.1em;
  line-height: 1.8;
  text-align: center;
  padding: 0;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.35s var(--ease-book), transform 0.35s var(--ease-book);
}

.result-inner.show {
  opacity: 1;
  transform: translateY(0);
  padding: 0.85rem 1rem;
}

.result-inner.correct {
  background: rgba(74,16,48,0.06);
  border: 1px solid rgba(74,16,48,0.2);
  color: var(--clr-secret);
}

.result-inner.incorrect {
  background: rgba(192,57,43,0.06);
  border: 1px solid rgba(192,57,43,0.2);
  color: var(--clr-vermilion);
}

/* ─── フッター ─── */
.secret-footer {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: clamp(1.5rem,4vw,2.5rem);
  border-top: 1px solid var(--clr-rule-lt);
}

.footer-text {
  font-family: var(--font-e);
  font-style: italic;
  font-size: clamp(0.62rem,1.1vw,0.72rem);
  color: var(--clr-muted);
  letter-spacing: 0.15em;
}

/* ─── 迷路エクスポートHTML ─── */
.mz-wrap {
  display: inline-block;
  border: 2px solid var(--clr-ink);
  box-shadow: 3px 3px 0 var(--clr-ink-mid);
  max-width: 100%;
  overflow-x: auto;
}
.mz-wrap table {
  border-collapse: collapse;
  display: block;
}
.mz-wrap td {
  /* clamp でスマホ・PCどちらでも見やすいセルサイズに */
  width:  clamp(22px, 4.5vw, 36px);
  height: clamp(22px, 4.5vw, 36px);
  text-align: center;
  vertical-align: middle;
  font-size: clamp(0.45rem, 1.2vw, 0.8rem);
  font-weight: 700;
  line-height: 1;
  border: 1px solid rgba(0,0,0,0.08);
  font-family: var(--font-m);
  white-space: nowrap;
  overflow: hidden;
}
.mz-wall  { background: var(--clr-ink);    color: var(--clr-paper-dk); }
.mz-path  { background: var(--clr-paper); }
.mz-start { background: var(--clr-cobalt); color: var(--clr-paper); }
.mz-goal  { background: var(--clr-gold);   color: var(--clr-paper); }
.mz-obs   { background: var(--clr-paper);  color: var(--clr-vermilion); }
.mz-col   { background: var(--clr-paper);  color: var(--clr-secret); }

/* 迷路ラッパー（横スクロール対応） */
.maze-scroll-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.25rem; /* スクロールバー分 */
}

/* ─── 謎画像 ─── */
.puzzle-img-wrap {
  margin-top: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.puzzle-img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--clr-rule);
}

/* ─── SVG謎 ─── */
.hint-svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0.85rem auto 0;
}
.hint-svg--narrow {
  max-width: min(300px, 100%);
}

/* ─── ドット絵テキスト ─── */
.hint-dot-art {
  margin-top: 0.6rem;
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  letter-spacing: 0.3em;
  line-height: 2.2;
  overflow-wrap: anywhere;
  word-break: break-all;
  color: var(--clr-ink-mid);
}

/* ─── 謎：矢印変換・数字漢字パズル ─── */
.puzzle-rows {
  margin-top: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.55em;
  font-family: var(--font-m);
  font-size: clamp(1rem, 2.2vw, 1.4rem);
  color: var(--clr-ink);
}
.puzzle-row {
  display: flex;
  align-items: baseline;
  gap: 0.4em;
  flex-wrap: wrap;
}
.puzzle-row-left {
  display: inline-flex;
  min-width: 7em;
  justify-content: center;
}
.puzzle-arrow   { color: var(--clr-ink-light); }
.puzzle-result  { color: var(--clr-muted); font-size: 0.85em; }
.puzzle-answer  { color: var(--clr-vermilion); font-weight: 700; font-size: 1.05em; }

/* ─── 謎：数字漢字パズル ─── */
.nazo3-row {
  display: flex;
  align-items: baseline;
  gap: 0.3em;
  flex-wrap: wrap;
}
.nazo3-bracket {
  display: inline-flex;
  align-items: baseline;
  min-width: 5.5em;
  justify-content: center;
}
.nazo3-maru  { color: var(--clr-secret); }
.nazo3-arrow { color: var(--clr-ink-light); margin: 0 0.2em; }
.nazo3-hint  { font-size: 0.75em; color: var(--clr-ink-mid); }
.nazo3-ans   { color: var(--clr-vermilion); font-weight: 700; }

/* ─── レスポンシブ ─── */
@media (max-width: 540px) {
  header.secret-header {
    grid-template-columns: 1fr;
    gap: 0.3rem;
    text-align: center;
  }
  .home-btn { justify-self: start; }
  .input-row { flex-direction: column; }
  .submit-btn { justify-content: center; }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── Focus ─── */
:focus-visible {
  outline: 2px solid var(--clr-cobalt);
  outline-offset: 2px;
}

/* =============================================
   将棋盤ブロック（.shogi-wrap 以下にスコープ）
   ============================================= */
.shogi-wrap {
  --board-color:  #e8c87a;
  --board-dark:   #c8a55a;
  --board-line:   #8b6914;
  --cell-size:    clamp(32px, 5.5vw, 52px);
  --sente-color:  #1a1a1a;
  --gote-color:   #8b0000;
  --oni-color:    #4a0080;
  --edge-dash:    #b8963a;

  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: flex-start;
  flex-wrap: wrap;
  justify-content: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.5rem 0 0.75rem;
}

/* 将棋盤全体 */
.shogi-wrap .board-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex-shrink: 0;
}

.shogi-wrap .col-numbers {
  display: flex;
  align-items: center;
  padding-left: calc(var(--cell-size) * 0.75 + 2px);
  margin-bottom: 2px;
}
.shogi-wrap .col-numbers span {
  width: var(--cell-size);
  text-align: center;
  font-size: 0.72em;
  color: var(--board-line);
  letter-spacing: 0;
}
.shogi-wrap .col-fade {
  width: calc(var(--cell-size) * 0.8);
  text-align: center;
  font-size: 1em;
  color: var(--edge-dash);
  letter-spacing: -2px;
}

.shogi-wrap .board-row-wrap {
  display: flex;
  align-items: flex-start;
}

.shogi-wrap .row-numbers {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-right: 2px;
  width: calc(var(--cell-size) * 0.75);
}
.shogi-wrap .row-numbers span {
  height: var(--cell-size);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72em;
  color: var(--board-line);
}
.shogi-wrap .row-fade {
  height: calc(var(--cell-size) * 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1em;
  color: var(--edge-dash);
  writing-mode: vertical-rl;
  letter-spacing: -4px;
}

/* 盤面グリッド */
.shogi-wrap .board {
  display: grid;
  grid-template-columns: repeat(10, var(--cell-size));
  grid-template-rows: repeat(6, var(--cell-size));
  border-top:  2.5px solid var(--board-line);
  border-left: 2.5px solid var(--board-line);
  background: var(--board-color);
  box-shadow: 4px 4px 0 #8b6914, 8px 8px 16px rgba(0,0,0,0.25);
  position: relative;
}
.shogi-wrap .board::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(170deg, transparent 0px, rgba(255,255,255,0.04) 2px, transparent 4px);
  pointer-events: none;
}

.shogi-wrap .cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-right:  1.5px solid var(--board-line);
  border-bottom: 1.5px solid var(--board-line);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-size: clamp(12px, 2vw, 20px);
  font-weight: 700;
}

/* 右端・下端の波線 */
.shogi-wrap .cell.edge-right  { border-right:  none; overflow: visible; }
.shogi-wrap .cell.edge-bottom { border-bottom: none; overflow: visible; }
.shogi-wrap .cell.edge-corner { border-right:  none; border-bottom: none; }

.shogi-wrap .cell.edge-right::after,
.shogi-wrap .cell.edge-corner::after {
  content: '';
  position: absolute;
  right: -8px; top: 0;
  width: 8px; height: 100%;
  background: repeating-linear-gradient(180deg, var(--edge-dash) 0px, var(--edge-dash) 4px, transparent 4px, transparent 8px);
  opacity: 0.6;
}
.shogi-wrap .cell.edge-bottom::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  height: 8px; width: 100%;
  background: repeating-linear-gradient(90deg, var(--edge-dash) 0px, var(--edge-dash) 4px, transparent 4px, transparent 8px);
  opacity: 0.6;
}
.shogi-wrap .cell.edge-corner::before {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  height: 8px; width: 100%;
  background: repeating-linear-gradient(90deg, var(--edge-dash) 0px, var(--edge-dash) 4px, transparent 4px, transparent 8px);
  opacity: 0.6;
}

/* 駒 */
.shogi-wrap .piece { position: relative; z-index: 1; }
.shogi-wrap .piece::before {
  content: '';
  position: absolute;
  inset: 4px;
  clip-path: polygon(50% 0%, 100% 30%, 100% 100%, 0% 100%, 0% 30%);
  z-index: -1;
}
.shogi-wrap .sente { color: var(--sente-color); }
.shogi-wrap .sente::before {
  background: #f5e8c0;
  box-shadow: inset 0 1px 2px rgba(255,255,255,0.5);
  filter: drop-shadow(1px 1px 1px rgba(0,0,0,0.3));
}
.shogi-wrap .gote { color: var(--gote-color); transform: rotate(180deg); }
.shogi-wrap .gote::before {
  background: #f5e8c0;
  filter: drop-shadow(1px 1px 1px rgba(0,0,0,0.3));
}
.shogi-wrap .oni { color: var(--oni-color); font-size: 0.85em; }
.shogi-wrap .oni::before {
  background: #e8d0f0;
  filter: drop-shadow(1px 1px 1px rgba(74,0,128,0.3));
}

/* 棋譜 */
.shogi-wrap .kifu-wrapper {
  background: var(--clr-paper);
  border: 1.5px solid var(--board-line);
  border-radius: 2px;
  padding: clamp(0.75rem, 2vw, 1rem) clamp(0.85rem, 2.5vw, 1.25rem);
  min-width: 8rem;
  box-shadow: 2px 2px 8px rgba(0,0,0,0.12);
  flex-shrink: 0;
}
.shogi-wrap .kifu-title {
  font-size: 0.8em;
  letter-spacing: 0.2em;
  color: var(--board-line);
  text-align: center;
  border-bottom: 1px solid var(--board-line);
  padding-bottom: 0.5rem;
  margin-bottom: 0.6rem;
}
.shogi-wrap .kifu-list {
  list-style: none;
  counter-reset: kifu;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.shogi-wrap .kifu-list li {
  counter-increment: kifu;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: clamp(12px, 1.8vw, 16px);
}
.shogi-wrap .kifu-list li::before {
  content: counter(kifu);
  font-size: 0.7em;
  color: #999;
  width: 16px;
  text-align: right;
}
.shogi-wrap .sente-move { color: var(--sente-color); }
.shogi-wrap .gote-move  { color: var(--gote-color); }
.shogi-wrap .oni-note {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--board-line);
  font-size: 0.85em;
  color: var(--oni-color);
  text-align: center;
  letter-spacing: 0.05em;
}

/* ─── 水槽アニメーション ─── */
.aquarium-wrap {
  margin-top: 0.85rem;
  border: 2px solid var(--clr-ink-mid);
  border-radius: 2px;
  overflow: hidden;
  box-shadow:
    inset 0 0 0 1px var(--clr-rule),
    2px 2px 0 var(--clr-ink-light);
  background: #d4e8f0;
  width: 100%;
}

.aquarium-canvas {
  display: block;
  width: 100%;
  height: clamp(180px, 35vw, 280px);
}