/* ===== 医療情報技師 試験対策 SPA ===== */
:root {
  --bg: #FAF7F2;
  --surface: #FFFFFF;
  --surface-2: #F4EFE7;
  --ink: #2C2A26;
  --ink-2: #5C5852;
  --ink-3: #8E887F;
  --line: #E7E0D3;
  --accent: #4A6B8A;       /* くすみブルー */
  --accent-soft: #DCE4EC;
  --accent-ink: #2F4A66;
  --correct: #5A8C6E;      /* くすみグリーン */
  --correct-soft: #DDE9E1;
  --wrong: #B5635A;        /* くすみテラコッタ */
  --wrong-soft: #F0DDD9;
  --warm: #C99860;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(60, 50, 30, 0.04), 0 2px 8px rgba(60, 50, 30, 0.04);
  --shadow-md: 0 2px 6px rgba(60, 50, 30, 0.06), 0 8px 24px rgba(60, 50, 30, 0.06);
  --font-jp: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-num: "Inter", "Noto Sans JP", system-ui, sans-serif;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-jp);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; padding: 0; }
button:disabled { cursor: not-allowed; }
a { color: var(--accent); }

#root { min-height: 100vh; }

.app {
  max-width: 520px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* ----- ヘッダー ----- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  position: sticky;
  top: 0;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 14px; color: var(--ink);
}
.brand-mark {
  width: 32px; height: 32px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  display: grid; place-items: center;
  font-weight: 700; font-size: 16px;
  letter-spacing: 0;
}
.brand-text { line-height: 1.2; text-align: left; }
.brand-text small { color: var(--ink-3); font-weight: 400; font-size: 11px; }
.icon-btn {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  color: var(--ink-2);
  transition: background .15s;
}
.icon-btn:hover, .icon-btn:active { background: var(--surface-2); color: var(--ink); }

.main { flex: 1; }

/* ----- 共通 画面コンテナ ----- */
.screen { padding: 24px 20px 80px; }

/* ----- スタート画面 ----- */
.hero { padding: 12px 4px 28px; }
.hero-eyebrow { font-size: 13px; color: var(--ink-3); margin: 0 0 4px; }
.hero-title {
  font-size: 30px; font-weight: 700; margin: 0 0 14px;
  letter-spacing: 0.01em; line-height: 1.4;
  color: var(--ink);
}
.hero-meta { font-size: 13px; color: var(--ink-3); margin: 0; }

.filter-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.filter-title {
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  margin: 0 0 10px;
  letter-spacing: 0.04em;
}
.filter-title:not(:first-child) { margin-top: 22px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  background: var(--surface-2);
  color: var(--ink-2);
  border: 1px solid transparent;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
}
.chip:hover { border-color: var(--line); }
.chip.is-on {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.toggle {
  display: flex; align-items: center; gap: 12px;
  margin-top: 22px;
  cursor: pointer;
  user-select: none;
}
.toggle input { display: none; }
.toggle-track {
  width: 42px; height: 24px;
  background: var(--surface-2);
  border-radius: 999px;
  position: relative;
  transition: background .2s;
  border: 1px solid var(--line);
}
.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  transition: transform .2s;
}
.toggle input:checked + .toggle-track { background: var(--accent); border-color: var(--accent); }
.toggle input:checked + .toggle-track .toggle-thumb { transform: translateX(18px); }
.toggle-label { font-size: 14px; color: var(--ink); }

.start-footer {
  margin-top: 28px;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.match-count {
  font-size: 14px; color: var(--ink-2); margin: 0;
  font-family: var(--font-num);
}
.match-num {
  font-size: 22px; font-weight: 700; color: var(--ink);
  margin-right: 4px;
}

/* ----- ボタン ----- */
.primary-btn {
  background: var(--ink);
  color: var(--bg);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 10px;
  transition: transform .1s, opacity .15s, background .15s;
}
.primary-btn:hover:not(:disabled) { background: var(--accent-ink); }
.primary-btn:active:not(:disabled) { transform: scale(0.98); }
.primary-btn:disabled { opacity: 0.35; }
.primary-btn.full { width: 100%; justify-content: center; padding: 16px; margin-top: 16px; border-radius: 14px; }

.secondary-btn {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  font-size: 15px; font-weight: 500;
  padding: 14px 28px;
  border-radius: 999px;
  transition: background .15s;
}
.secondary-btn:hover { background: var(--surface-2); }

/* ----- 出題画面 ----- */
.quiz-top { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.back-btn {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.back-btn:hover { background: var(--surface-2); }
.progress { flex: 1; }
.progress-text {
  font-size: 12px; color: var(--ink-3);
  font-family: var(--font-num); font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.progress-bar {
  height: 4px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width .3s ease;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  animation: cardIn .35s cubic-bezier(.2,.7,.3,1);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.card-meta {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-3);
  margin-bottom: 14px;
}
.meta-pill {
  background: var(--surface-2);
  color: var(--ink-2);
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 500;
  font-family: var(--font-num);
}
.meta-sep { color: var(--ink-3); opacity: 0.4; }

.question-text {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.7;
  margin: 6px 0 18px;
  color: var(--ink);
  text-wrap: pretty;
}

.multi-hint {
  font-size: 12px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  padding: 8px 12px;
  border-radius: 8px;
  margin: 0 0 16px;
}

/* ----- 選択肢 ----- */
.choices { display: flex; flex-direction: column; gap: 10px; }
.choice {
  display: flex; align-items: flex-start; gap: 12px;
  text-align: left;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.6;
  transition: all .15s;
  color: var(--ink);
}
.choice:not(:disabled):hover { border-color: var(--ink-3); }
.choice:not(:disabled):active { transform: scale(0.99); }
.choice.is-selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.choice.is-correct {
  border-color: var(--correct);
  background: var(--correct-soft);
  color: var(--ink);
}
.choice.is-wrong {
  border-color: var(--wrong);
  background: var(--wrong-soft);
}
.choice.is-dim { opacity: 0.55; }
.choice:disabled { cursor: default; }

.choice-mark {
  flex-shrink: 0;
  width: 22px; height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: grid; place-items: center;
  background: var(--bg);
  color: var(--ink);
  transition: all .15s;
}
.choice.is-selected .choice-mark { border-color: var(--accent); background: var(--accent); color: #fff; }
.choice.is-correct .choice-mark { border-color: var(--correct); background: var(--correct); color: #fff; }
.choice.is-wrong .choice-mark { border-color: var(--wrong); background: var(--wrong); color: #fff; }
.choice-mark .dot {
  width: 8px; height: 8px;
  background: #fff;
  border-radius: 50%;
}
.choice-text { flex: 1; padding-top: 1px; }

/* ----- 結果バナー & 解説 ----- */
.result-banner {
  margin: 18px 0 0;
  padding: 16px 18px;
  border-radius: 12px;
  display: flex; justify-content: space-between; align-items: center;
  animation: cardIn .25s ease;
}
.result-banner.correct { background: var(--correct-soft); color: var(--correct); }
.result-banner.wrong { background: var(--wrong-soft); color: var(--wrong); }
.result-label { font-size: 18px; font-weight: 700; }
.result-answer { font-size: 13px; opacity: 0.85; font-family: var(--font-num); }

.explanation {
  margin-top: 18px;
  background: var(--surface-2);
  border-radius: 12px;
  padding: 18px;
  animation: cardIn .35s ease .1s both;
}
.explanation h3 {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--ink-2);
  letter-spacing: 0.06em;
}
.explanation p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0;
  white-space: pre-wrap;
}
.source-link {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px;
  margin-top: 12px;
  color: var(--accent-ink);
  text-decoration: none;
  font-weight: 500;
}
.source-link:hover { text-decoration: underline; }

/* ----- 結果画面 ----- */
.result-hero {
  display: flex; flex-direction: column; align-items: center;
  margin: 16px 0 28px;
}
.circle {
  position: relative;
  width: 160px; height: 160px;
}
.circle-text {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.circle-num {
  font-family: var(--font-num);
  font-size: 44px; font-weight: 700;
  color: var(--ink);
  line-height: 1;
}
.circle-num small { font-size: 18px; color: var(--ink-3); margin-left: 2px; font-weight: 500; }
.circle-sub {
  font-size: 13px; color: var(--ink-3);
  margin-top: 6px;
  font-family: var(--font-num);
}
.result-title {
  font-size: 18px; font-weight: 600;
  margin: 22px 0 0;
  color: var(--ink);
}

.review-list {
  list-style: none; padding: 0; margin: 0 0 28px;
  display: flex; flex-direction: column; gap: 8px;
}
.review-item {
  display: flex; gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}
.review-mark {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700;
  font-size: 14px;
}
.review-mark.correct { background: var(--correct-soft); color: var(--correct); }
.review-mark.wrong { background: var(--wrong-soft); color: var(--wrong); }
.review-meta {
  font-size: 11px;
  color: var(--ink-3);
  margin-bottom: 4px;
  font-family: var(--font-num);
  letter-spacing: 0.02em;
}
.review-text {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.result-actions {
  display: flex; gap: 12px; justify-content: center;
}

/* ----- 統計画面 ----- */
.stats-top { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.stats-title { font-size: 18px; font-weight: 600; margin: 0; }
.overall {
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  margin-bottom: 28px;
}
.overall-num {
  font-family: var(--font-num);
  font-size: 48px; font-weight: 700;
  line-height: 1;
}
.overall-num small { font-size: 20px; opacity: 0.6; margin-left: 2px; }
.overall-meta { font-size: 12px; opacity: 0.65; margin-top: 8px; font-family: var(--font-num); }

.block { margin-bottom: 32px; }
.block-title {
  font-size: 13px; font-weight: 600;
  color: var(--ink-2);
  margin: 0 0 14px;
  letter-spacing: 0.06em;
}

.subject-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.subject-row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.subject-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 8px;
}
.subject-name { font-size: 14px; font-weight: 600; }
.subject-rate {
  font-family: var(--font-num);
  font-size: 18px; font-weight: 700;
  color: var(--accent-ink);
}
.subject-bar {
  height: 4px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 8px;
}
.subject-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width .4s ease;
}
.subject-meta {
  font-size: 11px; color: var(--ink-3);
  font-family: var(--font-num);
}

.wrong-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.wrong-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--wrong);
  border-radius: 10px;
  padding: 12px 14px;
}
.wrong-meta {
  font-size: 11px; color: var(--ink-3);
  margin-bottom: 4px;
  font-family: var(--font-num);
  display: flex; justify-content: space-between;
}
.wrong-rate { color: var(--wrong); font-weight: 600; }
.wrong-text {
  font-size: 13px;
  color: var(--ink);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.empty {
  font-size: 13px;
  color: var(--ink-3);
  text-align: center;
  padding: 24px;
}

.pass-btn {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  font-size: 14px;
  color: var(--ink-3);
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  text-align: center;
}
.pass-btn:hover { background: var(--surface-2); color: var(--ink-1); }

.reset-btn {
  display: block;
  margin: 32px auto 0;
  font-size: 12px;
  color: var(--ink-3);
  text-decoration: underline;
  padding: 8px 16px;
}
.reset-btn:hover { color: var(--wrong); }

/* PCで少し余白 */
@media (min-width: 600px) {
  .app { box-shadow: var(--shadow-md); border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
}