/* AT-CBT 問題集  style.css（スマホ優先） */

:root {
  --bg: #f4f7f7;
  --card: #ffffff;
  --ink: #14232a;
  --ink-soft: #5b6b73;
  --line: #dde6e6;
  --brand: #0f766e;
  --brand-dark: #0b5d56;
  --brand-soft: #e5f3f1;
  --expert: #1e4d8c;
  --expert-soft: #e6eef8;
  --ok: #15803d;
  --ok-soft: #e8f6ec;
  --ng: #b91c1c;
  --ng-soft: #fdeaea;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(16, 40, 45, .08), 0 6px 18px rgba(16, 40, 45, .05);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0 0 40px;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
               "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- ヘッダー ---------- */
.app-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  background: var(--brand); color: #fff;
  box-shadow: 0 2px 10px rgba(11, 93, 86, .25);
}
.app-header h1 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: .02em; }
.ghost {
  background: rgba(255, 255, 255, .16); border: 0; color: #fff;
  font-size: 14px; padding: 6px 10px; border-radius: 999px; cursor: pointer;
}
.ghost:active { background: rgba(255, 255, 255, .3); }

/* ---------- 画面共通 ---------- */
main { max-width: 720px; margin: 0 auto; padding: 18px 16px 0; }
.screen { animation: fade .18s ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.hidden { display: none !important; }

.lead { margin: 0 0 16px; color: var(--ink-soft); font-size: 14px; }
.screen-title { margin: 4px 0 14px; font-size: 18px; }

/* ---------- カード ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px; margin: 0 0 16px;
}
.card h2 {
  margin: 0 0 12px; font-size: 14px; font-weight: 700;
  color: var(--ink-soft); letter-spacing: .04em;
}

/* ---------- 種別（基礎／専門） ---------- */
.cat-row { display: flex; gap: 10px; }
.cat-card {
  flex: 1 1 0; padding: 14px 12px;
  border: 1.5px solid var(--line); border-radius: 12px;
  background: #fff; cursor: pointer; text-align: center;
  color: var(--ink); transition: .12s;
}
.cat-card .name { display: block; font-size: 17px; font-weight: 700; }
.cat-card .cnt { display: block; font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.cat-card.selected {
  border-color: var(--brand); background: var(--brand-soft);
  box-shadow: inset 0 0 0 1px var(--brand);
}
.cat-card.selected .cnt { color: var(--brand-dark); }
.cat-card.cat-expert.selected {
  border-color: var(--expert); background: var(--expert-soft);
  box-shadow: inset 0 0 0 1px var(--expert);
}
.cat-card.cat-expert.selected .cnt,
.cat-card.cat-expert.selected .name { color: var(--expert); }

/* ---------- 出題範囲の切り替え ---------- */
.seg {
  display: flex; gap: 6px; padding: 4px;
  background: #eef3f3; border-radius: 12px;
}
.seg-btn {
  flex: 1 1 0;
  padding: 11px 8px;
  border: 0; border-radius: 9px;
  background: transparent; color: var(--ink-soft);
  font-size: 14px; font-weight: 700;
  cursor: pointer;
}
.seg-btn.selected {
  background: #fff; color: var(--brand-dark);
  box-shadow: 0 1px 3px rgba(16, 40, 45, .14);
}

/* ---------- 分野リスト ---------- */
.field-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.field-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 13px 14px;
  border: 1.5px solid var(--line); border-radius: 12px;
  background: #fff; cursor: pointer; font-size: 15px;
  text-align: left; color: var(--ink); width: 100%;
}
.field-item .meta { font-size: 12px; color: var(--ink-soft); }
.field-item.selected {
  border-color: var(--brand); background: var(--brand-soft); font-weight: 700;
}
.field-item.selected .meta { color: var(--brand-dark); }
.field-item.disabled { opacity: .55; cursor: not-allowed; background: #f7fafa; }
.field-item .prep {
  font-size: 11px; font-weight: 700; color: var(--ink-soft);
  border: 1px solid var(--line); background: #fff;
  border-radius: 999px; padding: 1px 8px;
}

/* ---------- チップ ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 10px 18px;
  border: 1.5px solid var(--line); border-radius: 999px;
  background: #fff; color: var(--ink);
  font-size: 15px; cursor: pointer; min-width: 60px;
}
.chip.selected { border-color: var(--brand); background: var(--brand); color: #fff; font-weight: 700; }
.chip:disabled { opacity: .38; cursor: not-allowed; }

.note { margin: 10px 0 0; font-size: 12.5px; color: var(--ink-soft); line-height: 1.6; }

/* ---------- ボタン ---------- */
button { font-family: inherit; }
.primary, .secondary, .danger {
  display: block; width: 100%;
  padding: 15px 16px; margin: 0 0 10px;
  border-radius: 12px;
  font-size: 16px; font-weight: 700;
  cursor: pointer; border: 1.5px solid transparent;
}
.primary { background: var(--brand); color: #fff; box-shadow: 0 3px 10px rgba(15, 118, 110, .28); }
.primary:active { background: var(--brand-dark); }
.primary:disabled { background: #b9c6c6; box-shadow: none; cursor: not-allowed; }
.secondary { background: #fff; color: var(--brand-dark); border-color: var(--brand); }
.secondary:active { background: var(--brand-soft); }
.secondary:disabled { opacity: .5; cursor: not-allowed; }
.danger { background: #fff; color: var(--ng); border-color: #efc4c4; font-size: 14px; margin-top: 22px; }

.badge {
  display: inline-block; min-width: 22px;
  padding: 1px 7px; margin-left: 4px;
  border-radius: 999px;
  background: var(--brand-soft); color: var(--brand-dark);
  font-size: 12px; font-weight: 700;
}

.version { margin: 18px 0 0; text-align: center; font-size: 12px; color: #93a3a8; }

/* ---------- 出題画面 ---------- */
.quiz-top {
  display: flex; align-items: baseline; justify-content: space-between;
  margin: 0 0 8px; font-size: 13px; color: var(--ink-soft);
}
#quiz-progress { font-weight: 700; color: var(--ink); font-size: 15px; }
.quiz-mode { font-size: 12px; }

.progress { height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; margin: 0 0 16px; }
.progress-bar { height: 100%; width: 0; background: var(--brand); border-radius: 999px; transition: width .25s ease; }

.question-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 16px; margin: 0 0 14px;
}
.q-badge {
  display: inline-block; margin: 0 0 6px; padding: 3px 10px;
  border-radius: 999px; background: var(--brand-soft);
  color: var(--brand-dark); font-size: 12px; font-weight: 700;
}
.q-chapter { margin: 0 0 12px; font-size: 11.5px; color: var(--ink-soft); line-height: 1.5; }
.q-text { margin: 0 0 16px; font-size: 16.5px; line-height: 1.8; white-space: pre-wrap; }

/* ---------- 選択肢 ---------- */
.choices { display: flex; flex-direction: column; gap: 10px; }
.choice {
  display: flex; align-items: flex-start; gap: 11px;
  padding: 14px;
  border: 1.5px solid var(--line); border-radius: 12px;
  background: #fff; cursor: pointer;
  font-size: 15.5px; line-height: 1.6;
  text-align: left; color: var(--ink); width: 100%;
}
.choice .mark {
  flex: 0 0 auto; width: 22px; height: 22px;
  border: 1.5px solid #c3d1d1; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; color: #7d8f95;
  margin-top: 2px;
}
.choice.multi .mark { border-radius: 6px; }
.choice.selected { border-color: var(--brand); background: var(--brand-soft); }
.choice.selected .mark { background: var(--brand); border-color: var(--brand); color: #fff; }
.choice.is-correct { border-color: var(--ok); background: var(--ok-soft); }
.choice.is-correct .mark { background: var(--ok); border-color: var(--ok); color: #fff; }
.choice.is-wrong { border-color: var(--ng); background: var(--ng-soft); }
.choice.is-wrong .mark { background: var(--ng); border-color: var(--ng); color: #fff; }
.choice.locked { cursor: default; }

/* ---------- 採点フィードバック ---------- */
.feedback {
  border-radius: var(--radius); padding: 14px 16px; margin: 0 0 14px;
  border: 1px solid var(--line); background: #fff;
  font-size: 14px; line-height: 1.8;
}
.feedback.pending { border-color: #cfdcdc; background: #f2f7f7; }
.feedback.pending .verdict { color: var(--brand-dark); }
.feedback.ok { border-color: #b7e0c3; background: var(--ok-soft); }
.feedback.ng { border-color: #f0c8c8; background: var(--ng-soft); }
.feedback .verdict { display: block; font-weight: 700; font-size: 15px; margin-bottom: 6px; }
.feedback.ok .verdict { color: var(--ok); }
.feedback.ng .verdict { color: var(--ng); }
.feedback .correct-answer { margin: 0 0 8px; color: var(--ink); }
.feedback .explain { margin: 0; color: #35474e; white-space: pre-wrap; }

/* ---------- 結果 ---------- */
.result-hero {
  background: var(--brand); color: #fff;
  border-radius: var(--radius); padding: 22px 16px;
  text-align: center; margin: 0 0 16px;
  box-shadow: 0 6px 20px rgba(15, 118, 110, .28);
}
.result-label { margin: 0; font-size: 13px; opacity: .85; }
.result-score { margin: 6px 0 2px; font-size: 42px; font-weight: 700; line-height: 1.1; }
.result-score .slash { opacity: .6; font-size: 26px; }
.result-rate { margin: 0; font-size: 14px; opacity: .92; }

.review-list { margin: 0 0 18px; }
.review-item {
  background: #fff; border: 1px solid var(--line);
  border-left: 5px solid var(--line);
  border-radius: 10px; padding: 12px 14px;
  margin: 0 0 10px; font-size: 14px;
}
.review-item.ok { border-left-color: var(--ok); }
.review-item.ng { border-left-color: var(--ng); }
.review-item .ri-head {
  display: flex; gap: 8px; align-items: baseline;
  font-weight: 700; margin-bottom: 4px; font-size: 13px;
}
.review-item .ri-head .num { color: var(--ink-soft); font-weight: 600; }
.review-item .ri-text { margin: 0 0 6px; color: var(--ink); line-height: 1.7; }
.review-item .ri-line { margin: 2px 0; font-size: 13px; color: var(--ink-soft); line-height: 1.6; }
.review-item .ri-line b { color: var(--ink); }
.review-item .ri-explain {
  margin: 8px 0 0; padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px; color: #35474e; line-height: 1.7;
}

/* ---------- 履歴 ---------- */
.history-item {
  display: block; width: 100%; text-align: left;
  background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 14px; margin: 0 0 10px;
  cursor: pointer; color: var(--ink); box-shadow: var(--shadow);
}
.history-item .hi-top {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 10px; margin-bottom: 4px;
}
.history-item .hi-date { font-size: 12.5px; color: var(--ink-soft); }
.history-item .hi-score { font-size: 17px; font-weight: 700; color: var(--brand-dark); }
.history-item .hi-sub { font-size: 12.5px; color: var(--ink-soft); }

.empty {
  padding: 28px 16px; text-align: center;
  color: var(--ink-soft); font-size: 14px;
  background: #fff; border: 1px dashed var(--line);
  border-radius: var(--radius); margin: 0 0 16px;
}

@media (min-width: 560px) {
  body { font-size: 16.5px; }
  main { padding: 24px 20px 0; }
  .q-text { font-size: 17.5px; }
}

/* ===== v5 追加：後で解く・絞り込み ===== */
.defer-chip{display:inline-block;margin-left:8px;padding:2px 9px;border-radius:999px;
  background:#fdf1dd;color:#8a5a12;font-size:11px;font-weight:700;line-height:1.7;}
.defer-chip.hidden{display:none;}

#btn-later{width:100%;margin-top:8px;}
#btn-later.hidden{display:none;}
.ghost{background:#fff;color:var(--brand-dark);border:1.5px solid #cfdcdc;}
.ghost.hidden{display:none;}

.result-filter{display:flex;gap:8px;margin:0 0 12px;}
.chip{flex:1;padding:8px 4px;border-radius:10px;border:1.5px solid #d7e3e3;
  background:#fff;color:#35474e;font-size:12.5px;font-weight:700;cursor:pointer;}
.chip.selected{background:var(--brand);color:#fff;border-color:var(--brand);}
.empty{text-align:center;color:#7d8f95;font-size:12.5px;padding:14px 0;}

/* ===== v6 追加：解説ページに選択肢A〜Eを本文まで表示 ===== */
.choice-toggle{width:100%;margin:0 0 12px;font-size:12.5px;}

.ri-choices{margin:8px 0 0;padding:7px 0 0;border-top:1px dashed #e2ebeb;}
.ri-choice{display:flex;align-items:flex-start;gap:6px;margin:3px 0;
  font-size:12.5px;line-height:1.6;color:#7d8f95;}
.ri-choice .mk{flex:0 0 12px;font-weight:700;text-align:center;}
.ri-choice .lt{flex:0 0 13px;font-weight:700;}
.ri-choice .tx{flex:1;}
.ri-choice .cue{flex:0 0 auto;margin-left:6px;padding:1px 7px;border-radius:999px;
  font-size:10px;font-weight:700;color:#fff;background:#9aabb0;}
.ri-choice.is-correct{color:#1d6b4f;}
.ri-choice.is-correct .lt{color:#1d6b4f;}
.ri-choice.is-correct .cue{background:#1d6b4f;}
.ri-choice.is-wrong{color:#a8392f;}
.ri-choice.is-wrong .lt{color:#a8392f;}
.ri-choice.is-wrong .cue{background:#a8392f;}
.ri-choice.is-picked .tx{font-weight:700;}
.ri-ans{margin-top:6px;}
.hide-choices .ri-choices{display:none;}