/* ==========================================================
   絵合わせ(神経衰弱) - style.css
   見た目は atodashi-janken(基準実装)に合わせる
   すべてのクラスに .cp- プレフィックスを付与
   ========================================================== */

[hidden] { display: none !important; }

.cp-body {
  margin: 0;
  background: #e9ecef;
}

.cp-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.cp-app,
.cp-app *,
.cp-app *::before,
.cp-app *::after {
  box-sizing: border-box;
}

.cp-app {
  /* ---- CSS 変数(基準実装と共通) ---- */
  --cp-red: #E03131;
  --cp-blue: #1971C2;
  --cp-green: #2F9E44;
  --cp-bg: #f4f6fb;
  --cp-card: #ffffff;
  --cp-text: #212529;
  --cp-muted: #5c6670;
  --cp-primary: #3b5bdb;
  --cp-primary-dark: #2f49b3;
  --cp-border: #dee2e6;
  --cp-radius: 16px;

  position: relative;
  display: flex;
  flex-direction: column;
  max-width: 560px;
  min-height: 640px;
  margin: 0 auto;
  padding: 16px 16px max(16px, env(safe-area-inset-bottom));
  overflow: hidden;
  background: var(--cp-bg);
  color: var(--cp-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

/* 詳細度 0 のリセット(個別クラスの margin 等を邪魔しない) */
:where(.cp-app) :is(h1, h2, p, dl, dd, ul, ol, fieldset, legend) { margin: 0; padding: 0; }
:where(.cp-app) :is(ul, ol) { list-style: none; }
:where(.cp-app) fieldset { min-width: 0; border: 0; }

/* ---------- トップバー(戻る・やめる／効果音) ---------- */
.cp-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
}
.cp-app a.cp-back,
.cp-app .cp-sound-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--cp-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.08s ease, background-color 0.15s ease;
}
.cp-app a.cp-back { color: var(--cp-primary); }
.cp-app .cp-sound-btn { color: var(--cp-primary); }
.cp-app .cp-sound-btn[aria-pressed="true"] { color: var(--cp-muted); }
.cp-app a.cp-back:hover { background: #edf2ff; color: var(--cp-primary-dark); }
.cp-app .cp-sound-btn:hover { background: #f1f3f5; }
.cp-app a.cp-back:active,
.cp-app .cp-sound-btn:active { transform: scale(0.94); }
.cp-back svg,
.cp-sound-btn svg { display: block; width: 22px; height: 22px; }

/* 「やめる」ボタン(プレイ画面の左上。ゴースト形式の小さなボタン) */
.cp-app .cp-quit-btn {
  min-width: 72px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--cp-border);
  border-radius: 999px;
  background: var(--cp-card);
  color: #495057;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.08s ease, background-color 0.15s ease;
}
.cp-app .cp-quit-btn:hover { background: #f1f3f5; }
.cp-app .cp-quit-btn:active { transform: scale(0.97); }

.cp-app a.cp-back:focus-visible,
.cp-app .cp-sound-btn:focus-visible,
.cp-app .cp-quit-btn:focus-visible,
.cp-app .cp-btn:focus-visible,
.cp-app .cp-card-item:focus-visible,
.cp-app .cp-mode__input:focus-visible + .cp-mode__label,
.cp-app .cp-details summary:focus-visible { outline: 3px solid #ffd43b; outline-offset: 2px; }

/* ---------- 画面共通 ---------- */
.cp-screen {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 16px;
}

.cp-card {
  background: var(--cp-card);
  border-radius: var(--cp-radius);
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

/* ---------- ボタン ---------- */
.cp-btn {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 12px 20px;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 0.08s ease, background-color 0.15s ease, opacity 0.15s ease;
}
.cp-btn:active:not(:disabled) { transform: scale(0.97); }

.cp-btn--primary { background: var(--cp-primary); color: #fff; box-shadow: 0 4px 0 var(--cp-primary-dark); }
.cp-btn--primary:hover:not(:disabled) { background: #4263eb; }
.cp-btn--cta { min-height: 64px; font-size: 1.25rem; }
.cp-app a.cp-btn--x {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px;
  background: #111; color: #fff; text-decoration: none;
}
.cp-app a.cp-btn--x:hover { background: #333; color: #fff; }
.cp-btn--ghost { background: transparent; color: #495057; border: 1px solid var(--cp-border); min-height: 44px; }

/* ---------- ① スタート画面 ---------- */
.cp-title-area {
  font-size: clamp(1.4rem, 5.5vw, 1.8rem);
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}
.cp-title { padding-top: 4px; font-size: 1em; }
.cp-subtitle { font-size: 0.7em; color: var(--cp-primary); }

.cp-rule__lead { text-align: center; font-size: 1.05rem; margin-bottom: 12px; }
.cp-rule__lead strong { color: var(--cp-primary); }

/* ルールの図解(CSS とインライン SVG): 裏向き 2 枚 → 同じ絵 2 枚 */
.cp-figure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 12px;
}
.cp-figure__pair { display: flex; gap: 6px; }
.cp-figure__card {
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 8px;
}
.cp-figure__card--back {
  border: 3px solid #fff;
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.28) 0 4px, transparent 4px 8px),
    var(--cp-primary);
  box-shadow: 0 0 0 1px var(--cp-primary-dark);
}
.cp-figure__card--front {
  padding: 4px;
  border: 2px solid var(--cp-primary);
  background: #fff;
}
.cp-figure__card--front svg { display: block; width: 100%; height: 100%; }
.cp-figure__arrow { flex: none; display: block; width: 24px; height: 24px; color: var(--cp-primary); }

.cp-rule__list { font-size: 0.85rem; display: grid; gap: 4px; }
.cp-rule__list li { padding-left: 1.1em; position: relative; }
.cp-rule__list li::before { content: "●"; position: absolute; left: 0; color: var(--cp-primary); font-size: 0.6em; top: 0.5em; }

/* 難易度の選択(ラジオ。入力そのものは見えなくして、ラベルを押す部品として見せる) */
.cp-mode { min-width: 0; }
/* legend は float にして、カードの枠の上にはみ出さず、カードの中の見出しとして置く */
.cp-mode__legend { float: left; width: 100%; padding: 0; margin-bottom: 8px; font-size: 0.9rem; font-weight: 800; }
.cp-mode__row { clear: both; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.cp-mode__item { position: relative; min-width: 0; }
.cp-mode__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}
.cp-mode__label {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 4px 2px;
  border: 3px solid #adb5bd;
  border-radius: 12px;
  background: var(--cp-card);
  color: var(--cp-text);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
}
/* 選択中は、色だけでなく、太い枠・背景・チェック印でも分かる */
.cp-mode__input:checked + .cp-mode__label {
  border-color: var(--cp-primary);
  background: #edf2ff;
  color: var(--cp-primary-dark);
  font-weight: 800;
}
.cp-mode__input:checked + .cp-mode__label::before {
  content: "✓";
  position: absolute;
  top: 1px;
  left: 5px;
  font-size: 0.7rem;
  line-height: 1;
}

.cp-stats { display: flex; justify-content: space-around; text-align: center; gap: 8px; }
.cp-stats__item { flex: 1; min-width: 0; }
.cp-stats__item dt { font-size: 0.75rem; color: var(--cp-muted); }
.cp-stats__item dd { font-size: 1.15rem; font-weight: 800; font-variant-numeric: tabular-nums; }

/* 「中級（12枚）」のような文字の値は、数字の値より少し小さくして、1 行に収める */
.cp-stats__item dd.cp-stats__value--text { font-size: 0.9rem; line-height: 1.7; }

.cp-details { padding: 8px 16px; font-size: 0.85rem; color: #495057; }
.cp-details summary { display: flex; align-items: center; min-height: 44px; cursor: pointer; font-weight: 700; touch-action: manipulation; }
.cp-table { width: 100%; margin: 4px 0 8px; border-collapse: collapse; }
.cp-table th, .cp-table td { padding: 6px 4px; text-align: left; border-bottom: 1px solid var(--cp-border); }
.cp-table td:first-child { font-weight: 800; color: var(--cp-primary); }
.cp-details__note { margin-bottom: 8px; }

/* スポンサー枠(スタート画面は余白・枠線・背景を持たない) */
.cp-sponsor { text-align: center; }
.cp-sponsor--result { margin-top: 48px; } /* 操作ボタンから 35px 以上離す */

/* ---------- ② プレイ画面 ---------- */
.cp-screen--play {
  gap: 12px;
  /* 長押しメニュー・テキスト選択の抑止は、カードのグリッドにかける(下の .cp-grid) */
}

.cp-status { display: grid; gap: 4px; text-align: center; }
.cp-status__row { display: flex; justify-content: space-between; gap: 8px; font-size: 1rem; font-weight: 700; }
.cp-status__item strong { font-size: 1.25rem; font-weight: 800; font-variant-numeric: tabular-nums; }
/* 判定の文言: 空のときも高さを確保する(カードの位置を動かさない) */
.cp-status__message { min-height: 1.8em; font-size: 1.15rem; font-weight: 800; line-height: 1.5; }

/* カードのグリッド: 4 列固定、カードは正方形。最大幅 480px で中央寄せ */
.cp-grid {
  --cp-flip-ms: 250ms;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  perspective: 800px;
  /* 長押しメニュー・テキスト選択の抑止(ゲーム領域だけ) */
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.cp-card-item {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: transparent;
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.cp-card-item__inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform var(--cp-flip-ms) ease;
}
.cp-card-item[data-state="front"] .cp-card-item__inner,
.cp-card-item[data-state="matched"] .cp-card-item__inner { transform: rotateY(180deg); }

.cp-card-item__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
/* 裏面: 青地にしま模様(絵柄は無い) */
.cp-card-item__face--back {
  border: 4px solid #fff;
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.28) 0 6px, transparent 6px 12px),
    var(--cp-primary);
  box-shadow: 0 3px 0 var(--cp-primary-dark);
}
/* 表面: 白地に絵柄。絵柄は図形(輪郭)で見分ける */
.cp-card-item__face--front {
  padding: 8%;
  border: 3px solid var(--cp-primary);
  background: #fff;
  transform: rotateY(180deg);
}
.cp-card-item__art { display: block; width: 100%; height: 100%; }

.cp-card-item[data-state="matched"] { opacity: 0.4; cursor: default; }
.cp-card-item[data-state="front"] { cursor: default; }
.cp-card-item[data-state="back"]:active .cp-card-item__face--back { filter: brightness(1.1); }

/* ---------- ③ 結果画面 ---------- */
.cp-result__title { text-align: center; font-size: 1.4rem; font-weight: 800; }
.cp-result__main { position: relative; text-align: center; padding-top: 24px; }

.cp-new-record {
  display: inline-block; margin: 0 auto 8px; padding: 2px 14px;
  background: #c92a2a; color: #ffffff;
  font-weight: 900; letter-spacing: 0.08em; border-radius: 999px;
  animation: cp-blink 0.9s ease-in-out infinite alternate;
}
@keyframes cp-blink { from { transform: scale(1); } to { transform: scale(1.08); } }

.cp-result__rank {
  width: 96px; height: 96px; margin: 0 auto 8px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; color: #ffffff;
  font-size: 3.4rem; font-weight: 900; line-height: 1;
  background: #5c6670;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation: cp-pop 0.5s;
}
@keyframes cp-pop {
  0% { transform: scale(0.6); opacity: 0; }
  70% { transform: scale(1.12); opacity: 1; }
  100% { transform: scale(1); }
}
.cp-result__message { font-size: 1.05rem; font-weight: 800; }
.cp-result__score { font-size: 2.6rem; font-weight: 900; line-height: 1.3; font-variant-numeric: tabular-nums; }
.cp-result__score small { margin-left: 2px; font-size: 1rem; }

.cp-actions { display: grid; gap: 12px; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 380px) {
  .cp-app { padding-left: 16px; padding-right: 16px; }
}
@media (min-width: 600px) {
  .cp-app { margin-top: 16px; margin-bottom: 16px; border-radius: 20px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12); }
}

/* 動きを減らす設定への配慮(アニメーションと遷移を無効にする。表示は変えない) */
@media (prefers-reduced-motion: reduce) {
  .cp-app *, .cp-app *::before, .cp-app *::after {
    animation: none !important;
    transition: none !important;
  }
}