/* /learn/java-review/ 共通スタイル.
   tetris/othello の course.css と step.css を継承し、復習アプリ専用
   スタイルを追加。.step-hero / .step-hero__inner などは step.css 側。 */

@import url("/learn/tetris/course.css");
@import url("/learn/tetris/step.css");

:root {
  --review-correct: #2E7D32;
  --review-wrong:   #C62828;
  --review-neutral: #6B6B6B;
  --review-hint-bg: #FFF8E1;
  --review-ai-bg:   #E8F0FE;
}

/* ---------- Landing dashboard ---------- */
.review-dashboard {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
@media (min-width: 720px) {
  .review-dashboard { grid-template-columns: repeat(3, 1fr); }
}
.review-dashboard__card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  background: #FDFCFA;
}
.review-dashboard__card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-transform: uppercase;
}
.review-dashboard__card-value {
  font-family: var(--font-fraunces);
  font-size: 36px;
  font-weight: 500;
  margin-top: 6px;
}
.review-dashboard__card-detail {
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
}

/* ---------- Section list (chapters) ---------- */
.review-sections {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
@media (min-width: 800px) {
  .review-sections { grid-template-columns: repeat(2, 1fr); }
}

.review-section-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #FDFCFA;
  text-decoration: none;
  color: inherit;
  transition: border-color 140ms var(--ease), background 140ms var(--ease);
}
.review-section-card:hover {
  border-color: var(--accent);
}
.review-section-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.review-section-card__title {
  font-family: var(--font-fraunces);
  font-size: 22px;
  font-weight: 500;
}
.review-section-card__meta {
  font-size: 13px;
  color: var(--muted);
}
.review-section-card__progress {
  margin-top: 8px;
  height: 4px;
  background: #ECE9E2;
  border-radius: 2px;
  overflow: hidden;
}
.review-section-card__progress-bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 240ms var(--ease);
}
.review-section-card__done-mark {
  position: absolute;
  top: 14px;
  right: 16px;
  font-size: 18px;
}

/* ---------- Quiz layout ---------- */
.quiz {
  padding-bottom: clamp(80px, 8vw, 120px);
}
.quiz__inner {
  max-width: 760px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.quiz__progress {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}
.quiz__progress-bar {
  flex: 1;
  height: 4px;
  background: #ECE9E2;
  border-radius: 2px;
  overflow: hidden;
}
.quiz__progress-bar-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 240ms var(--ease);
}

.quiz__card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 28px 24px;
  background: #FDFCFA;
}
.quiz__subtopic {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.quiz__prompt {
  font-family: var(--font-fraunces);
  font-size: 22px;
  line-height: 1.5;
  margin: 6px 0 18px;
}
.quiz__starter {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  background: #F1EFEA;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  white-space: pre;
  overflow-x: auto;
  margin-bottom: 18px;
  tab-size: 4;
}
.quiz__starter .blank {
  display: inline-block;
  min-width: 60px;
  padding: 0 6px;
  background: #FFE8E4;
  color: #D43A2F;
  border-radius: 3px;
  font-weight: 700;
}
/* 出力予測タイプの「↓ 出力を入力」ガイド (暗背景化は :has() で処理) */
.quiz__predict-label {
  font-size: 12px;
  color: var(--muted);
  margin: -8px 0 12px;
  letter-spacing: 0.02em;
}

/* 択一タイプ — radio をカード状の選択肢に */
.quiz__choices {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}
.quiz__choice {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #FFFFFF;
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}
.quiz__choice:hover {
  border-color: var(--accent);
  background: #FFF8F4;
}
.quiz__choice input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--border);
  border-radius: 50%;
  margin: 0;
  display: grid;
  place-content: center;
  cursor: pointer;
}
.quiz__choice input[type="radio"]::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  transform: scale(0);
  transition: transform 0.1s ease;
}
.quiz__choice input[type="radio"]:checked {
  border-color: var(--accent);
}
.quiz__choice input[type="radio"]:checked::before {
  transform: scale(1);
}
.quiz__choice:has(input:checked) {
  border-color: var(--accent);
  background: #FFF8F4;
}
.quiz__choice-key {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  min-width: 18px;
}
.quiz__choice-text {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--fg);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}
.quiz__submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.quiz__answer-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}
.quiz__answer {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #FFFFFF;
  outline: none;
  min-width: 0;
}
.quiz__answer:focus {
  border-color: var(--accent);
}
.quiz__submit {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  background: var(--fg);
  color: var(--bg);
  border: 1px solid var(--fg);
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background 140ms var(--ease), border-color 140ms var(--ease);
}
.quiz__submit:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
}
.quiz__submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.quiz__feedback {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.6;
}
.quiz__feedback[hidden] { display: none; }
.quiz__feedback--correct {
  background: #E8F5E9;
  border: 1px solid #A5D6A7;
  color: var(--review-correct);
}
.quiz__feedback--wrong {
  background: #FFEBEE;
  border: 1px solid #EF9A9A;
  color: var(--review-wrong);
}
.quiz__feedback-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.quiz__feedback-note {
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 4px;
  background: rgba(255, 90, 31, 0.08);
  border-left: 2px solid var(--accent);
  color: var(--fg);
  font-size: 13px;
  line-height: 1.6;
}
.quiz__action {
  font-family: var(--font-mono);
  font-size: 12px;
  background: transparent;
  color: inherit;
  border: 1px solid currentColor;
  border-radius: 4px;
  padding: 6px 12px;
  cursor: pointer;
}
.quiz__action:hover { background: rgba(0, 0, 0, 0.04); }
.quiz__action:disabled { opacity: 0.5; cursor: not-allowed; }

.quiz__hint {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--review-hint-bg);
  border: 1px solid #FFCC80;
  border-radius: 6px;
  font-size: 14px;
  color: #5D4037;
}
.quiz__hint[hidden] { display: none; }
.quiz__hint-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #8D6E63;
  text-transform: uppercase;
  margin-right: 6px;
}

.quiz__ai {
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--review-ai-bg);
  border: 1px solid #90CAF9;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: #0D47A1;
  white-space: pre-wrap;
}
.quiz__ai[hidden] { display: none; }
.quiz__ai-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #1565C0;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.quiz__ai-loading {
  font-style: italic;
  color: #1565C0;
}

.quiz__nav {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.quiz__nav-btn {
  font-family: var(--font-mono);
  font-size: 13px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 6px;
  padding: 8px 16px;
  cursor: pointer;
}
.quiz__nav-btn:hover { background: #F1EFEA; }
.quiz__nav-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.quiz__done {
  text-align: center;
  padding: 60px 20px;
}
.quiz__done h2 {
  font-family: var(--font-fraunces);
  font-size: 32px;
  margin-bottom: 12px;
}
.quiz__done p { color: var(--muted); margin-bottom: 24px; }

/* ---------- Concept (解説) ページ ---------- */
.concept {
  padding-bottom: clamp(80px, 8vw, 120px);
}
.concept__inner {
  max-width: 760px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.concept section {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px 28px;
  background: #FDFCFA;
  margin-bottom: 22px;
}
.concept section h2 {
  font-family: var(--font-fraunces);
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 14px;
}
.concept section h3 {
  font-family: var(--font-fraunces);
  font-size: 16px;
  font-weight: 500;
  margin: 16px 0 6px;
  color: var(--fg);
}
.concept section p,
.concept section li {
  font-size: 15px;
  line-height: 1.85;
  color: var(--fg);
}
.concept section ul {
  padding-left: 20px;
  margin: 4px 0;
}
.concept section ul li {
  margin-bottom: 6px;
}
.concept section code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: #F1EFEA;
  padding: 1px 5px;
  border-radius: 3px;
}
.concept section pre {
  background: #1A1A1A;
  color: #F4F2EE;
  padding: 16px 18px;
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  margin: 12px 0;
}
.concept section pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* Prism.js — VSCode Dark+ 風 Java ハイライト (サイト全体に適用) */
pre code[class*="language-"] .token.comment,
pre code[class*="language-"] .token.prolog,
pre code[class*="language-"] .token.doctype,
pre code[class*="language-"] .token.cdata {
  color: #6A9955;
  font-style: italic;
}
pre code[class*="language-"] .token.keyword {
  color: #569CD6;
}
pre code[class*="language-"] .token.string,
pre code[class*="language-"] .token.char {
  color: #CE9178;
}
pre code[class*="language-"] .token.number,
pre code[class*="language-"] .token.boolean {
  color: #B5CEA8;
}
pre code[class*="language-"] .token.class-name,
pre code[class*="language-"] .token.builtin {
  color: #4EC9B0;
}
pre code[class*="language-"] .token.function {
  color: #DCDCAA;
}
pre code[class*="language-"] .token.annotation {
  color: #DCDCAA;
}
pre code[class*="language-"] .token.operator,
pre code[class*="language-"] .token.punctuation {
  color: #D4D4D4;
}
pre code[class*="language-"] .token.generics,
pre code[class*="language-"] .token.generics .token.punctuation {
  color: #D4D4D4;
}

/* code[class*="language-"] を含む quiz__starter は暗背景に切り替え */
.quiz__starter:has(> code[class*="language-"]) {
  background: #1A1A1A;
  color: #F4F2EE;
  border-color: #1A1A1A;
}
.quiz__starter > code[class*="language-"] {
  background: transparent;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  padding: 0;
}

.concept .concept__diagram pre.mermaid {
  background: #FFFFFF;
  border: 1px solid var(--border);
  color: var(--fg);
  text-align: center;
  padding: 20px;
}
.concept__pitfall section h3,
.concept__pitfall h3 {
  color: #B8322A;
}
.concept-banner {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  background: #FFF8E1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
  font-size: 14px;
}
.concept-banner a {
  font-family: var(--font-mono);
  font-size: 13px;
  white-space: nowrap;
}

/* 「つまずいたら」セクションのリンクをタップ可能なチップとして見せる */
.concept__next {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #F4F2EE;
  padding: 14px 18px;
}
.concept__next h2 {
  margin-top: 0;
}
.concept__next p {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}
.concept__next a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}
.concept__next a::after {
  content: "→";
  font-size: 14px;
}
.concept__next a:hover,
.concept__next a:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
  text-decoration: none;
}
.concept__next a:active {
  transform: translateY(1px);
}

/* 「使い方」3 ステップ */
.how-steps {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 800px) {
  .how-steps {
    grid-template-columns: 1fr;
  }
}
.how-step {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #FFFFFF;
  padding: 20px 22px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.how-step__num {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.how-step__body {
  flex: 1 1 auto;
  min-width: 0;
}
.how-step__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  margin: 2px 0 6px;
  color: var(--fg);
}
.how-step__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
}
.how-step__body strong {
  font-weight: 500;
  color: var(--fg);
  background: linear-gradient(transparent 70%, rgba(255, 90, 31, 0.22) 70%);
  padding: 0 2px;
}

.how-note {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: #F4F2EE;
  padding: 14px 18px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  align-items: start;
}
.how-note__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 2px;
  white-space: nowrap;
}
.how-note p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}
.how-note code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: #FFFFFF;
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--fg);
}
@media (max-width: 600px) {
  .how-note {
    grid-template-columns: 1fr;
  }
}