/* =========================================================
   Codex 活用度チェック — 教材ポータル準拠デザイン
   ポータル(styles.css)のトークンを踏襲:
   canvas #f4f7fb / ink #142238 / navy #12356b / blue #2b70ef
   ========================================================= */
:root {
  --canvas: #f4f7fb;
  --surface: #ffffff;
  --ink: #142238;
  --text: #526075;
  --muted: #6d7b8e;
  --line: #d6e0eb;
  --navy: #12356b;
  --blue: #2b70ef;
  --blue-dark: #1c48b2;
  --blue-pale: #e7f0ff;
  --amber: #efb849;
  --ok: #157a4c;
  --ok-pale: #e4f4ec;
  --ng: #bf3434;
  --ng-pale: #fbe9e9;
  --max: 1080px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- ヘッダー / フッター ---------- */
.site-header {
  height: 68px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
  padding: 0 clamp(18px, 4vw, 48px);
}
.brand { display: inline-flex; align-items: center; gap: 11px; line-height: 1.08; }
.brand-mark {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 8px; background: var(--navy); color: #fff;
  font-size: .78rem; font-weight: 800;
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: .78rem; letter-spacing: .06em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: .64rem; }
.header-home {
  color: var(--blue-dark); font-size: .8rem; font-weight: 800;
  text-decoration: none; border: 1px solid var(--line);
  border-radius: 7px; padding: 8px 14px; background: #fff;
}
.header-home:hover { border-color: var(--blue); }

footer {
  min-height: 58px; display: flex; align-items: center; justify-content: center;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: .68rem; font-weight: 750; letter-spacing: .07em;
}

main { width: min(90vw, var(--max)); margin: 0 auto; padding: clamp(36px, 6vh, 72px) 0 56px; min-height: calc(100vh - 126px); }
.screen[hidden] { display: none; }

.kicker { margin: 0 0 .5rem; color: var(--blue-dark); font-size: clamp(.68rem, 1vw, .8rem); font-weight: 800; letter-spacing: .08em; }

/* ---------- スタート画面 ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px); align-items: center;
}
.hero h1 {
  margin: 0; font-size: clamp(2.5rem, 5.6vw, 4.6rem);
  line-height: 1.04; letter-spacing: -.05em;
}
.hero-sub { margin: 1rem 0 0; color: var(--navy); font-size: clamp(1rem, 1.9vw, 1.35rem); font-weight: 800; letter-spacing: .02em; }
.hero-lead { margin: .9rem 0 0; max-width: 34rem; color: var(--text); font-size: clamp(.86rem, 1.35vw, 1rem); }
.hero-visual img {
  width: 100%; max-width: 100%; height: auto; display: block;
  border-radius: 14px; border: 1px solid var(--line);
}

.name-box {
  margin-top: clamp(26px, 4.5vh, 44px);
  background: var(--surface); border: 1px solid var(--line); border-left: 5px solid var(--amber);
  border-radius: 10px; padding: 18px clamp(18px, 3vw, 26px);
  display: grid; gap: 8px;
}
.name-box label { font-weight: 800; font-size: .9rem; }
.name-box label small { margin-left: 10px; color: var(--muted); font-weight: 700; font-size: .74rem; }
.name-box input {
  max-width: 22rem; min-height: 46px;
  font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--canvas); border: 1.5px solid var(--line); border-radius: 8px;
  padding: 0 14px;
}
.name-box input:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px var(--blue-pale); }
.name-error { margin: 0; color: var(--ng); font-size: .82rem; font-weight: 750; }

.mode-grid {
  margin-top: 18px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
}
.mode-card {
  text-align: left; border: 1px solid var(--line); border-left: 5px solid var(--blue);
  background: var(--surface); border-radius: 10px;
  padding: clamp(20px, 3vw, 30px);
  font: inherit; color: inherit; cursor: pointer;
  display: flex; flex-direction: column; gap: .45rem; align-items: flex-start;
  transition: box-shadow .15s ease, transform .15s ease;
}
button.mode-card:hover { box-shadow: 0 10px 26px rgba(18, 53, 107, .12); transform: translateY(-2px); }
.mode-card--list { cursor: default; }
.mode-label { margin: 0; color: var(--blue-dark); font-size: .72rem; font-weight: 800; letter-spacing: .06em; }
.mode-card h2 { margin: 0; font-size: clamp(1.35rem, 2.4vw, 1.9rem); letter-spacing: -.02em; }
.mode-card p { margin: 0; color: var(--text); font-size: .88rem; }
.mode-meta { min-height: 1.2em; color: var(--blue-dark); font-weight: 700; font-size: .8rem; }
.mode-cta {
  margin-top: auto; display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 26px; border-radius: 7px;
  background: var(--blue); color: #fff; font-weight: 800; font-size: .92rem;
}
button.mode-card:hover .mode-cta { background: var(--blue-dark); }

.cat-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: .4rem; }
.cat-buttons button {
  font: inherit; font-size: .8rem; font-weight: 750; color: var(--navy);
  border: 1px solid var(--line); background: var(--canvas);
  border-radius: 999px; padding: 8px 14px; cursor: pointer;
}
.cat-buttons button:hover { border-color: var(--blue); color: var(--blue-dark); background: var(--blue-pale); }

.map { margin-top: clamp(34px, 6vh, 58px); }
.map h3, .cat-result h3, .miss-list-wrap h3, .review-links h3 {
  margin: 0 0 .8rem; font-size: 1rem; letter-spacing: .02em;
}
.map-list {
  list-style: none; margin: 0; padding: 0;
  border-top: 1px solid var(--line);
}
.map-list li {
  display: grid; grid-template-columns: 44px minmax(0,1fr) auto;
  gap: 14px; align-items: center;
  padding: 13px 4px; border-bottom: 1px solid var(--line);
}
.map-id {
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 8px; background: var(--navy); color: #fff;
  font-weight: 800; font-size: .85rem;
}
.map-name { font-weight: 800; font-size: .95rem; }
.map-tag { color: var(--muted); font-size: .8rem; }

/* ---------- 出題画面 ---------- */
.quiz-top { display: grid; gap: 10px; }
.quiz-meta { display: flex; align-items: center; gap: 12px; }
.cat-chip {
  display: inline-flex; align-items: center;
  background: var(--navy); color: #fff; border-radius: 999px;
  padding: 5px 14px; font-size: .76rem; font-weight: 800; letter-spacing: .03em;
}
.quiz-count { color: var(--muted); font-size: .82rem; font-weight: 750; }
.progress {
  height: 8px; border-radius: 999px; background: #e3eaf2; overflow: hidden;
}
.progress span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--blue), var(--blue-dark));
  border-radius: 999px; transition: width .25s ease;
}
.quit-link {
  justify-self: end; font: inherit; font-size: .76rem; font-weight: 700;
  color: var(--muted); background: none; border: none; cursor: pointer;
  text-decoration: underline; text-underline-offset: 3px; padding: 2px;
}
.quit-link:hover { color: var(--ng); }

.q-card {
  margin-top: 18px; background: var(--surface);
  border: 1px solid var(--line); border-left: 5px solid var(--blue);
  border-radius: 10px; padding: clamp(20px, 3.4vw, 34px);
}
.q-text { margin: 0 0 1.1rem; font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.55; letter-spacing: -.01em; }
.choices { display: grid; gap: 10px; }
.choice {
  display: grid; grid-template-columns: 34px minmax(0,1fr); gap: 12px; align-items: start;
  text-align: left; font: inherit; color: var(--ink);
  background: var(--canvas); border: 1.5px solid var(--line); border-radius: 9px;
  padding: 13px 15px; cursor: pointer; font-size: .93rem; line-height: 1.55;
  transition: border-color .12s ease, background .12s ease;
}
.choice:hover:not(:disabled) { border-color: var(--blue); background: var(--blue-pale); }
.choice:disabled { cursor: default; }
.choice-key {
  width: 26px; height: 26px; margin-top: 1px; display: grid; place-items: center;
  border-radius: 7px; background: #fff; border: 1px solid var(--line);
  font-size: .78rem; font-weight: 800; color: var(--navy);
}
.choice.is-correct { border-color: var(--ok); background: var(--ok-pale); }
.choice.is-correct .choice-key { background: var(--ok); border-color: var(--ok); color: #fff; }
.choice.is-wrong { border-color: var(--ng); background: var(--ng-pale); }
.choice.is-wrong .choice-key { background: var(--ng); border-color: var(--ng); color: #fff; }
.choice.is-dim { opacity: .55; }
.key-hint { margin: 1rem 0 0; color: var(--muted); font-size: .72rem; }

.feedback {
  margin-top: 14px; background: var(--surface);
  border: 1px solid var(--line); border-radius: 10px;
  padding: clamp(18px, 3vw, 28px);
}
.feedback-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.verdict {
  display: inline-flex; align-items: center; border-radius: 999px;
  padding: 5px 16px; font-size: .85rem; font-weight: 800; color: #fff;
}
.verdict.ok { background: var(--ok); }
.verdict.ng { background: var(--ng); }
.answer-label { color: var(--ink); font-weight: 750; font-size: .88rem; }
.explanation { margin: .9rem 0 0; color: var(--ink); font-size: .92rem; }
.wrong-note { margin: .6rem 0 0; color: var(--text); font-size: .85rem; }
.wrong-note:empty { display: none; }
.source { margin: .7rem 0 0; color: var(--muted); font-size: .76rem; font-weight: 700; }
.source a, .miss-src a { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 2px; }
.btn-next {
  margin-top: 1.1rem; min-height: 46px; padding: 0 30px;
  font: inherit; font-weight: 800; font-size: .95rem;
  border: 1px solid var(--blue); border-radius: 7px;
  background: var(--blue); color: #fff; cursor: pointer;
}
.btn-next:hover { background: var(--blue-dark); border-color: var(--blue-dark); }

/* ---------- 結果画面 ---------- */
#screen-result h1 { margin: 0; font-size: clamp(2.2rem, 4.6vw, 3.6rem); letter-spacing: -.045em; line-height: 1.05; }
.send-note { margin: .7rem 0 0; min-height: 1.2em; color: var(--blue-dark); font-size: .82rem; font-weight: 750; }
.send-note:empty { display: none; }
.result-hero {
  margin-top: clamp(20px, 4vh, 34px);
  display: grid; grid-template-columns: auto minmax(0,1fr);
  gap: clamp(18px, 3vw, 34px); align-items: stretch;
}
.score-block {
  background: var(--navy); color: #fff; border-radius: 12px;
  padding: clamp(20px, 3vw, 32px) clamp(24px, 3.4vw, 40px);
  display: flex; flex-direction: column; justify-content: center; min-width: 218px;
}
.result-hero.is-compact { grid-template-columns: 1fr; }
.result-hero.is-compact .score-block { flex-direction: row; align-items: baseline; gap: 22px; }
.result-hero.is-compact .score-rate { margin: 0; }
.score-big { margin: 0; font-size: clamp(3rem, 6vw, 4.6rem); font-weight: 800; line-height: 1; letter-spacing: -.04em; }
.score-big small { font-size: .38em; font-weight: 750; opacity: .75; margin-left: 4px; }
.score-rate { margin: .5rem 0 0; font-size: .9rem; font-weight: 750; opacity: .85; }
.level-block {
  background: var(--surface); border: 1px solid var(--line); border-left: 5px solid var(--amber);
  border-radius: 12px; padding: clamp(18px, 3vw, 30px);
  display: flex; gap: 18px; align-items: center;
}
.level-grade {
  margin: 0; width: 64px; height: 64px; flex: none;
  display: grid; place-items: center; border-radius: 12px;
  background: var(--amber); color: var(--navy);
  font-size: 2rem; font-weight: 800;
}
.level-name { margin: 0; font-size: clamp(1.2rem, 2.4vw, 1.7rem); font-weight: 800; letter-spacing: -.02em; }
.level-msg { margin: .35rem 0 0; color: var(--text); font-size: .88rem; }

.cat-result { margin-top: clamp(30px, 5vh, 46px); }
.cat-row {
  display: grid; grid-template-columns: minmax(120px, 220px) minmax(0,1fr) 64px;
  gap: 14px; align-items: center; padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.cat-row:first-of-type { border-top: 1px solid var(--line); }
.cat-row-name { font-weight: 800; font-size: .88rem; }
.cat-row-name small { display: block; color: var(--muted); font-weight: 700; font-size: .7rem; }
.cat-bar { height: 10px; background: #e3eaf2; border-radius: 999px; overflow: hidden; }
.cat-bar span { display: block; height: 100%; border-radius: 999px; background: var(--blue); }
.cat-bar span.low { background: var(--ng); }
.cat-bar span.mid { background: var(--amber); }
.cat-row-score { text-align: right; font-weight: 800; font-size: .88rem; color: var(--navy); }

.miss-list-wrap { margin-top: clamp(30px, 5vh, 46px); }
.miss-item {
  background: var(--surface); border: 1px solid var(--line); border-left: 5px solid var(--ng);
  border-radius: 10px; padding: 18px 20px; margin-bottom: 12px;
}
.miss-q { margin: 0; font-weight: 800; font-size: .92rem; }
.miss-a { margin: .55rem 0 0; font-size: .86rem; color: var(--ink); }
.miss-a strong { color: var(--ok); }
.miss-exp { margin: .45rem 0 0; color: var(--text); font-size: .82rem; }
.miss-src { margin: .45rem 0 0; color: var(--muted); font-size: .72rem; font-weight: 700; }
.all-clear {
  background: var(--ok-pale); border: 1px solid #bfe3cf; border-radius: 10px;
  color: var(--ok); font-weight: 800; padding: 18px 20px; margin: 0;
}

.review-links { margin-top: clamp(30px, 5vh, 46px); }
.review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.review-grid a {
  display: block; background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 16px 18px;
  color: var(--ink); font-weight: 800; font-size: .9rem; text-decoration: none;
}
.review-grid a small { display: block; margin-top: 4px; color: var(--muted); font-weight: 700; font-size: .74rem; }
.review-grid a:hover { border-color: var(--blue); }

.result-actions { margin-top: clamp(28px, 5vh, 44px); display: flex; flex-wrap: wrap; gap: 12px; }
.btn-primary, .btn-ghost {
  min-height: 48px; padding: 0 28px; font: inherit; font-weight: 800; font-size: .95rem;
  border-radius: 7px; cursor: pointer;
}
.btn-primary { background: var(--blue); border: 1px solid var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn-ghost { background: #fff; border: 1px solid var(--line); color: var(--navy); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue-dark); }

/* ---------- レスポンシブ ---------- */
@media (max-width: 840px) {
  .hero { grid-template-columns: 1fr; }
  .hero-visual { max-width: 420px; }
  .mode-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .result-hero { grid-template-columns: 1fr; }
  .score-block { min-width: 0; }
}
@media (max-width: 560px) {
  main { width: min(92vw, var(--max)); }
  .map-list li { grid-template-columns: 44px minmax(0,1fr); }
  .map-tag { grid-column: 2; }
  .cat-row { grid-template-columns: minmax(0,1fr) 56px; }
  .cat-bar { grid-column: 1 / -1; }
  .header-home { font-size: .72rem; padding: 7px 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}