/* ==============================
   二重神経支配クイズ — style.css
   ptcore デザインシステムに準拠
============================== */

/* ─── リセット & ベース ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-navy:      #0f2c5c;
  --color-indigo:    #4338ca;
  --color-indigo-dk: #3730a3;
  --color-teal:      #0d9488;
  --color-emerald:   #059669;
  --color-orange:    #d97706;
  --color-bg:        #f8fbff;
  --color-white:     #ffffff;
  --color-gray-100:  #f3f4f6;
  --color-gray-200:  #e5e7eb;
  --color-gray-400:  #9ca3af;
  --color-gray-600:  #4b5563;
  --color-text:      #1e293b;
  --color-text-sub:  #64748b;
  --color-correct:   #059669;
  --color-wrong:     #dc2626;
  --color-missed:    #d97706;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.14);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --font-base: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ==============================
   サイト共通ヘッダー
============================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.site-header-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-indigo);
  padding: 6px 14px;
  border-radius: 50px;
  background: rgba(67,56,202,.07);
  transition: background var(--transition);
}
.site-back-link:hover { background: rgba(67,56,202,.14); }

.site-header-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-navy);
}

.site-logo-link {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.site-logo-pt {
  background: linear-gradient(135deg, #1a56db, #0d9488);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.site-logo-core { color: var(--color-navy); }

/* ==============================
   コンテナ
============================== */
.container {
  max-width: 620px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

/* ==============================
   画面切り替え
============================== */
#app { min-height: calc(100vh - 56px); }
.screen { display: none; }
.screen.active { display: block; }
.hidden { display: none !important; }

/* ==============================
   モード選択画面：ヒーロー
============================== */
.app-hero {
  text-align: center;
  padding: 32px 0 24px;
}

.app-hero-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--color-indigo), var(--color-indigo-dk));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(67,56,202,.32);
  color: #fff;
}
.app-hero-icon svg { width: 40px; height: 40px; }

.app-hero-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.app-hero-desc {
  font-size: 0.95rem;
  color: var(--color-text-sub);
}

/* ==============================
   モード選択画面：統計バー
============================== */
.stats-bar {
  display: flex;
  justify-content: space-around;
  background: var(--color-white);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.stat-item { text-align: center; }

.stat-val {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-indigo);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-lbl {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-sub);
  letter-spacing: 0.04em;
}

/* ==============================
   モード選択画面：モードカード
============================== */
.mode-section { margin-top: 4px; }

.mode-lead {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-sub);
  text-align: center;
  margin-bottom: 16px;
}

.mode-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mode-card {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  background: var(--color-white);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-sm);
  text-align: left;
  font-family: var(--font-base);
}
.mode-card:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-indigo);
}
.mode-card:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
}

.mode-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mode-card-icon svg { width: 24px; height: 24px; }
.mode-card-icon--indigo  { background: rgba(67,56,202,.1);  color: var(--color-indigo); }
.mode-card-icon--emerald { background: rgba(5,150,105,.1);  color: var(--color-emerald); }
.mode-card-icon--orange  { background: rgba(217,119,6,.1);  color: var(--color-orange); }

.mode-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.mode-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
}
.mode-card-desc {
  font-size: 0.82rem;
  color: var(--color-text-sub);
}

.mode-card-badge {
  flex-shrink: 0;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
}
.mode-card-badge--indigo  { background: rgba(67,56,202,.1);  color: var(--color-indigo);  border: 1px solid rgba(67,56,202,.2); }
.mode-card-badge--emerald { background: rgba(5,150,105,.1);  color: var(--color-emerald); border: 1px solid rgba(5,150,105,.2); }
.mode-card-badge--orange  { background: rgba(217,119,6,.1);  color: var(--color-orange);  border: 1px solid rgba(217,119,6,.2); }

/* リセットリンク */
.reset-row {
  text-align: center;
  margin-top: 20px;
}
.btn-reset-link {
  background: none;
  border: none;
  color: var(--color-gray-600);
  font-size: 0.82rem;
  font-family: var(--font-base);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color var(--transition);
}
.btn-reset-link:hover { color: var(--color-wrong); }

/* ==============================
   学習モード画面
============================== */
.learn-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-top: 4px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-indigo);
  background: rgba(67,56,202,.07);
  border: none;
  border-radius: 50px;
  padding: 7px 16px;
  cursor: pointer;
  font-family: var(--font-base);
  transition: background var(--transition);
}
.btn-back:hover { background: rgba(67,56,202,.14); }

.learn-count-badge {
  font-size: 0.82rem;
  font-weight: 700;
  background: #eef2ff;
  color: var(--color-indigo);
  border: 1px solid #c7d2fe;
  border-radius: 50px;
  padding: 4px 14px;
}

.learn-title {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-navy);
  margin-bottom: 16px;
}

.learn-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-indigo);
  transition: transform var(--transition), box-shadow var(--transition);
}
.learn-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.learn-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.learn-muscle-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--color-navy);
}

.weak-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: #fee2e2;
  color: var(--color-wrong);
  border: 1px solid #fca5a5;
  border-radius: 50px;
  padding: 2px 10px;
}

.nerve-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 2px;
}

.nerve-tag {
  font-size: 0.82rem;
  font-weight: 600;
  background: #eef2ff;
  color: var(--color-indigo);
  border: 1px solid #c7d2fe;
  border-radius: 50px;
  padding: 3px 12px;
}

.learn-note {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  font-size: 0.8rem;
  color: #92400e;
  background: #fef3c7;
  border-radius: 6px;
  padding: 7px 11px;
  margin-top: 8px;
  border-left: 3px solid var(--color-missed);
  line-height: 1.5;
}
.learn-note svg { flex-shrink: 0; margin-top: 1px; }

/* ==============================
   クイズ画面：苦手モードバナー
============================== */
.mode-banner {
  background: #fef3c7;
  border: 1.5px solid #fbbf24;
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #92400e;
  margin-bottom: 14px;
  text-align: center;
}

/* ==============================
   クイズ画面：進捗バー上部
============================== */
.quiz-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.quiz-topbar-progress {
  display: flex;
  align-items: center;
  gap: 16px;
}

.quiz-progress-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-sub);
}

.quiz-score-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-indigo);
}

.btn-quit {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  background: none;
  border: 1px solid var(--color-gray-200);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gray-600);
  cursor: pointer;
  font-family: var(--font-base);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}
.btn-quit:hover {
  background: var(--color-gray-100);
  color: var(--color-wrong);
  border-color: var(--color-wrong);
}

/* ==============================
   クイズ画面：プログレスバー
============================== */
.progress-bar-wrap {
  height: 5px;
  background: var(--color-gray-200);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 20px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-indigo), #818cf8);
  border-radius: 99px;
  transition: width 0.4s ease;
}

/* ==============================
   クイズ画面：問題カード
============================== */
.question-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 16px;
  border-top: 3px solid var(--color-indigo);
}

.question-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-indigo);
  margin-bottom: 10px;
}

.question-main {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-navy);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 8px;
}

.question-hint {
  font-size: 0.78rem;
  color: var(--color-text-sub);
  font-weight: 500;
}

/* ==============================
   クイズ画面：チェックボックス選択肢
============================== */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.check-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--color-white);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  box-shadow: var(--shadow-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  user-select: none;
}
.check-option:hover:not(.disabled) {
  border-color: var(--color-indigo);
  background: #eef2ff;
  transform: translateX(4px);
}
.check-option.checked {
  border-color: var(--color-indigo);
  background: #e0e7ff;
  font-weight: 700;
  transform: translateX(4px);
}
.check-option.correct {
  border-color: var(--color-correct);
  background: #dcfce7;
  color: #166534;
  font-weight: 700;
}
.check-option.wrong {
  border-color: var(--color-wrong);
  background: #fee2e2;
  color: #991b1b;
  font-weight: 700;
}
.check-option.missed {
  border-color: var(--color-missed);
  background: #fef3c7;
  color: #92400e;
  font-weight: 700;
}
.check-option.disabled {
  cursor: default;
  pointer-events: none;
}

/* カスタムチェックボックス */
.check-box {
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-gray-400);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color var(--transition), background var(--transition);
  color: transparent;
}

.check-option.checked .check-box  { border-color: var(--color-indigo); background: var(--color-indigo); color: #fff; }
.check-option.correct .check-box  { border-color: var(--color-correct); background: var(--color-correct); color: #fff; }
.check-option.wrong   .check-box  { border-color: var(--color-wrong);   background: var(--color-wrong);   color: #fff; }
.check-option.missed  .check-box  { border-color: var(--color-missed);  background: var(--color-missed);  color: #fff; }

.icon-check, .icon-x, .icon-dash { display: none; width: 12px; height: 12px; flex-shrink: 0; }
.check-option.checked .icon-check { display: block; }
.check-option.correct .icon-check { display: block; }
.check-option.wrong   .icon-x    { display: block; }
.check-option.missed  .icon-dash  { display: block; }

/* ==============================
   クイズ画面：フィードバック
============================== */
.feedback {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.75;
  margin-bottom: 16px;
  overflow-wrap: break-word;
}
.feedback.correct-feedback {
  background: #f0fdf4;
  border: 1.5px solid #86efac;
  color: #166534;
}
.feedback.wrong-feedback {
  background: #fff1f2;
  border: 1.5px solid #fca5a5;
  color: #991b1b;
}

/* ==============================
   共通：操作ボタン行
============================== */
.btn-row {
  display: flex;
  gap: 10px;
}

.btn-primary {
  flex: 1;
  padding: 14px 20px;
  background: linear-gradient(135deg, var(--color-indigo) 0%, var(--color-indigo-dk) 100%);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-base);
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(67,56,202,.35);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #6366f1 0%, var(--color-indigo) 100%);
  box-shadow: 0 8px 30px rgba(67,56,202,.45);
  transform: translateY(-2px);
}
.btn-primary:disabled {
  background: var(--color-gray-400);
  box-shadow: none;
  cursor: not-allowed;
}

.btn-secondary {
  flex: 1;
  padding: 14px 20px;
  background: var(--color-white);
  color: var(--color-indigo);
  border: 1.5px solid var(--color-indigo);
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: var(--font-base);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  transition: background var(--transition), transform var(--transition);
}
.btn-secondary:hover { background: #eef2ff; transform: translateY(-2px); }

/* ==============================
   結果画面
============================== */
.result-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-navy);
  margin-bottom: 20px;
  padding-top: 8px;
}

.result-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin-bottom: 24px;
  border-top: 4px solid var(--color-indigo);
}

.result-message {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-indigo);
  margin-bottom: 14px;
}

.result-fraction {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: 8px;
}

.result-percent {
  font-size: 1rem;
  color: var(--color-text-sub);
}

.result-weak-info {
  font-size: 0.82rem;
  color: var(--color-text-sub);
  font-weight: 600;
  margin-top: 10px;
}

/* ─── 間違えた問題一覧 ─── */
.wrong-list { margin-bottom: 20px; }

.wrong-list h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-wrong);
  margin-bottom: 12px;
}

.wrong-item {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-bottom: 10px;
  border-left: 4px solid var(--color-wrong);
  box-shadow: var(--shadow-sm);
}

.wrong-question {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-sub);
  margin-bottom: 4px;
}

.wrong-name {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 4px;
}

.wrong-user-answer {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-wrong);
  margin-bottom: 6px;
}

.wrong-explanation {
  font-size: 0.82rem;
  color: var(--color-text-sub);
  line-height: 1.65;
  background: #fef3c7;
  border-radius: 6px;
  padding: 6px 10px;
  margin-top: 6px;
  border-left: 3px solid var(--color-missed);
}

.all-correct {
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-correct);
  padding: 20px;
  background: #f0fdf4;
  border-radius: var(--radius-sm);
  border: 1.5px solid #86efac;
  margin-bottom: 16px;
}

/* ==============================
   レスポンシブ
============================== */
@media (max-width: 480px) {
  .question-main   { font-size: 1.4rem; }
  .result-fraction { font-size: 2.8rem; }
  .check-option    { font-size: 0.86rem; padding: 12px 14px; }
  .mode-card-name  { font-size: 0.95rem; }
  .app-hero-title  { font-size: 1.5rem; }
  .stat-val        { font-size: 1.5rem; }
}