/* ===== 保育士試験 スマホ学習帳 — Editorial Pink ===== */
:root {
  --pink: #d6336c;
  --pink-deep: #a61e4d;
  --pink-soft: #f9e7ee;
  --gold: #b08d57;
  --bg: #faf6f7;
  --card: #ffffff;
  --ink: #211a1e;
  --sub: #8a7580;
  --border: #ecd9e0;
  --correct: #2f7d5d;
  --correct-bg: #e7f3ed;
  --wrong: #b4233c;
  --wrong-bg: #fbe7eb;
  --header: #191216;
  --btn-bg: #191216;
  --btn-fg: #ffffff;
  --shadow: 0 2px 10px rgba(33, 26, 30, 0.05);
  --serif: "Playfair Display", "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --pink: #f06595;
    --pink-deep: #f48fb1;
    --pink-soft: #33202b;
    --gold: #cba46f;
    --bg: #141014;
    --card: #1f171c;
    --ink: #f2e7ec;
    --sub: #a88e9b;
    --border: #3a2c34;
    --correct: #5fbf95;
    --correct-bg: #1d3229;
    --wrong: #e76d87;
    --wrong-bg: #3a1e27;
    --header: #100b0e;
    --btn-bg: #f06595;
    --btn-fg: #1a1014;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

::selection { background: var(--pink-soft); }

/* ---- ヘッダー ---- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--header);
  color: #fff;
  padding: calc(env(safe-area-inset-top, 0px) + 12px) 14px 12px;
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--pink), var(--gold)) 1;
}

.app-header h1 {
  font-family: var(--serif);
  font-size: 1.06rem;
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.back-btn {
  flex: 0 0 auto;
  background: none;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
}

/* ---- レイアウト ---- */
.app-main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 14px calc(env(safe-area-inset-bottom, 0px) + 40px);
}

.app-footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 18px calc(env(safe-area-inset-bottom, 0px) + 26px);
  color: var(--sub);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-align: center;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 16px 18px;
  margin-bottom: 14px;
}

.muted { color: var(--sub); font-size: 0.84rem; }

.tagline {
  font-family: var(--serif);
  text-align: center;
  color: var(--sub);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  margin: 2px 0 14px;
}

.tagline em { color: var(--pink); font-style: italic; }

/* ---- ホーム: 科目リスト ---- */
.subject-list { display: flex; flex-direction: column; gap: 12px; }

.subject-card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--pink);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 14px 16px;
  cursor: pointer;
  color: var(--ink);
  font: inherit;
}

.subject-card:active { background: var(--pink-soft); }

.subject-card .row1 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.subject-num {
  flex: 0 0 auto;
  font-family: var(--serif);
  font-size: 0.72rem;
  font-style: italic;
  letter-spacing: 0.1em;
  color: var(--pink);
  border: 1px solid var(--pink);
  border-radius: 2px;
  padding: 1px 8px;
}

.subject-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.04rem;
  letter-spacing: 0.05em;
  flex: 1 1 auto;
}

.subject-meta { font-size: 0.74rem; color: var(--sub); margin-top: 5px; letter-spacing: 0.02em; }

.progress-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-top: 9px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--pink), var(--gold));
  border-radius: 2px;
  transition: width 0.3s;
}

.pair-badge {
  flex: 0 0 auto;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 2px;
  padding: 1px 6px;
}

.total-stats { display: flex; gap: 10px; text-align: center; }

.total-stats .stat { flex: 1; }

.total-stats .num {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--pink);
  line-height: 1.2;
}

.total-stats .label {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--sub);
  margin-top: 2px;
}

.link-row {
  display: block;
  width: 100%;
  text-align: center;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--pink-deep);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 12px;
  margin-top: 14px;
  cursor: pointer;
}

/* ---- 科目ページ: タブ ---- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.tab-btn {
  flex: 1;
  border: none;
  background: none;
  font: inherit;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  padding: 11px 4px;
  border-bottom: 2px solid transparent;
  color: var(--sub);
  cursor: pointer;
}

.tab-btn.active { color: var(--ink); border-bottom-color: var(--pink); }

.subject-intro { font-size: 0.85rem; color: var(--sub); margin: 0 4px 14px; }

.pair-note {
  background: var(--card);
  border: 1px solid var(--gold);
  border-radius: 4px;
  color: var(--ink);
  font-size: 0.8rem;
  padding: 10px 14px;
  margin: 0 0 14px;
}

.pair-note::before {
  content: "ATTENTION";
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  color: var(--gold);
  margin-bottom: 2px;
}

/* ---- テキスト(アコーディオン) ---- */
details.section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: var(--shadow);
  margin-bottom: 11px;
  overflow: hidden;
}

details.section summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.96rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

details.section summary::-webkit-details-marker { display: none; }

details.section summary::after {
  content: "＋";
  margin-left: auto;
  color: var(--pink);
  font-weight: 400;
}

details.section[open] summary::after { content: "－"; }

details.section .sec-body { padding: 0 17px 15px; }

.sec-body ul { margin: 0; padding-left: 19px; }

.sec-body li { margin-bottom: 9px; font-size: 0.89rem; }

.sec-body li::marker { color: var(--pink); }

.sec-body strong { color: var(--pink-deep); }

/* ---- クイズ ---- */
.mode-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--pink);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 14px 17px;
  margin-bottom: 11px;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
}

.mode-btn:active { background: var(--pink-soft); }

.mode-btn .t { font-family: var(--serif); font-weight: 700; letter-spacing: 0.04em; }

.mode-btn .d { font-size: 0.76rem; color: var(--sub); margin-top: 2px; letter-spacing: 0.03em; }

.quiz-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--sub);
}

.quiz-head .qtag {
  border: 1px solid var(--pink);
  color: var(--pink);
  border-radius: 2px;
  padding: 1px 9px;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  max-width: 55%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.quiz-head .qcount {
  margin-left: auto;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.08em;
}

.q-text {
  font-size: 0.98rem;
  font-weight: 600;
  margin: 2px 0 16px;
  white-space: pre-wrap;
}

.choices { display: flex; flex-direction: column; gap: 10px; }

.choice-btn {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 12px 14px;
  font: inherit;
  font-size: 0.92rem;
  color: var(--ink);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.choice-btn .cnum {
  flex: 0 0 23px;
  height: 23px;
  border-radius: 50%;
  border: 1px solid var(--pink);
  color: var(--pink);
  background: none;
  font-family: var(--serif);
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.choice-btn.correct {
  border-color: var(--correct);
  background: var(--correct-bg);
}

.choice-btn.correct .cnum { background: var(--correct); border-color: var(--correct); color: #fff; }

.choice-btn.wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
}

.choice-btn.wrong .cnum { background: var(--wrong); border-color: var(--wrong); color: #fff; }

.choice-btn:disabled { opacity: 1; }

.judge {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin: 15px 0 7px;
}

.judge.ok { color: var(--correct); }

.judge.ng { color: var(--wrong); }

.explanation {
  background: var(--pink-soft);
  border-left: 2px solid var(--pink);
  border-radius: 2px;
  padding: 12px 14px;
  font-size: 0.87rem;
  margin-top: 4px;
  white-space: pre-wrap;
}

.explanation strong { color: var(--pink-deep); letter-spacing: 0.1em; }

.next-btn, .primary-btn {
  display: block;
  width: 100%;
  border: none;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  border-radius: 3px;
  padding: 15px;
  margin-top: 16px;
  cursor: pointer;
}

.secondary-btn {
  display: block;
  width: 100%;
  background: none;
  border: 1px solid var(--pink);
  color: var(--pink);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  border-radius: 3px;
  padding: 13px;
  margin-top: 10px;
  cursor: pointer;
}

/* ---- 結果 ---- */
.result-score {
  text-align: center;
  padding: 14px 0 6px;
  border: 1px solid var(--border);
  border-radius: 3px;
  margin: 2px 2px 10px;
}

.result-score .big {
  font-family: var(--serif);
  font-size: 2.8rem;
  font-weight: 600;
  font-style: italic;
  color: var(--pink);
  line-height: 1.15;
}

.result-score .sub {
  color: var(--sub);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  padding-bottom: 8px;
}

.result-pass {
  text-align: center;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-top: 8px;
}

.result-pass.ok { color: var(--correct); }

.result-pass.ng { color: var(--wrong); }

/* ---- ガイド ---- */
.guide h3 {
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: 0.06em;
  margin: 4px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  color: var(--pink-deep);
}

.guide p, .guide li { font-size: 0.88rem; }

.guide ul { padding-left: 19px; margin: 6px 0; }

.guide li::marker { color: var(--pink); }

.guide strong { color: var(--pink-deep); }

.guide table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin: 8px 0;
}

.guide th, .guide td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
}

.guide th { background: var(--pink-soft); color: var(--pink-deep); letter-spacing: 0.06em; }

.hint {
  background: var(--pink-soft);
  border-left: 2px solid var(--pink);
  border-radius: 2px;
  padding: 11px 14px;
  font-size: 0.84rem;
}