/* ===========================================================
   新にほんご500問 — Soal Latihan JLPT (versi Bahasa Indonesia)
   Stylesheet utama — dipakai index.html + bab-*.html
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Nunito:wght@400;600;700&display=swap');

:root {
  --bg: #fff5ee;
  --text: #222;
  --brand: #E85F82;
  --brand-dark: #C43F63;
  --gold: #FFB84D;
  --brand-soft: #FFF3F8;
  --card-bg: #fff;
  --card-bg-alt: #fafafa;
  --card-border: #ddd;
  --muted: #6b6b6b;
  --muted2: #555;
  --ja-scale: 1;
  --correct-bg: #e8f5e9;
  --correct-border: #4caf50;
  --correct-text: #2e7d32;
  --wrong-text: #c62828;
  --moji-color: #E85F82;
  --goi-color: #ad1457;
  --bunpou-color: #6a4c1f;
}

[data-theme="dark"] {
  --bg: #14151a;
  --text: #e8e8e8;
  --brand: #f48fb1;
  --brand-dark: #ad6079;
  --gold: #ffcc80;
  --brand-soft: #2E1420;
  --card-bg: #1d1e24;
  --card-bg-alt: #202126;
  --card-border: #5C2338;
  --muted: #9a9aa2;
  --muted2: #b5b5bd;
  --correct-bg: #17281a;
  --correct-border: #4caf50;
  --correct-text: #81c784;
  --wrong-text: #ef9a9a;
  --moji-color: #82b1ff;
  --goi-color: #f48fb1;
  --bunpou-color: #d7b98a;
  --muted: #a3a3ad;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Nunito', -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background .2s ease, color .2s ease;
}
a { color: inherit; }
ruby { ruby-position: over; }
rt { font-size: 0.58em; color: var(--muted); font-weight: 400; }
[lang="ja"] {
  font-family: 'Noto Serif JP', 'Yu Mincho', 'Hiragino Mincho Pro', serif;
  font-size: calc(1em * var(--ja-scale));
}

/* ── Update banner (PWA) ── */
#sw-update-banner {
  position: sticky; top: 0; z-index: 50;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 8px 12px; font-size: 13px;
}
#sw-update-banner button {
  background: #fff; color: var(--brand); border: none; border-radius: 6px;
  padding: 4px 10px; font-weight: 700; font-size: 12px; cursor: pointer;
}

/* ── Page nav (top bar within a bab page) ── */
.page-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; padding: 10px 14px; background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  position: sticky; top: 0; z-index: 40;
}
.page-nav a, .page-nav .disabled {
  font-size: 13px; font-weight: 700; color: var(--brand); text-decoration: none;
  padding: 6px 10px; border-radius: 8px; white-space: nowrap;
}
.page-nav a:hover { background: var(--brand-soft); }
.page-nav .disabled { color: var(--muted); pointer-events: none; }
.page-nav .nav-title {
  font-size: 12px; font-weight: 700; color: var(--muted2);
  flex: 1; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.theme-toggle {
  background: none; border: 1px solid var(--card-border); border-radius: 50%;
  width: 32px; height: 32px; font-size: 15px; cursor: pointer; color: var(--text);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

/* ── Kontrol ukuran huruf Jepang (aA) ── */
.ja-size-toggle {
  background: none; border: 1px solid var(--card-border); border-radius: 50%;
  width: 32px; height: 32px; font-size: 12px; font-weight: 800; cursor: pointer;
  color: var(--text); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; position: relative;
}
.ja-size-panel {
  display: none; position: absolute; top: 44px; right: 8px; z-index: 60;
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 12px;
  padding: 10px 12px; box-shadow: 0 4px 16px rgba(0,0,0,.18);
  min-width: 200px;
}
.ja-size-panel.show { display: block; }
.ja-size-panel-label {
  font-size: 11px; font-weight: 700; color: var(--muted2); margin-bottom: 8px;
  display: flex; align-items: center; justify-content: space-between;
}
.ja-size-row { display: flex; align-items: center; gap: 8px; }
.ja-size-row input[type="range"] { flex: 1; accent-color: var(--brand); }
.ja-size-btn {
  background: var(--brand-soft); color: var(--brand); border: none; border-radius: 6px;
  width: 26px; height: 26px; font-size: 14px; font-weight: 800; cursor: pointer;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ja-size-sample {
  margin-top: 8px; font-size: calc(1em * var(--ja-scale)); text-align: center;
  color: var(--text); font-family: 'Noto Serif JP', serif;
}

/* ── Chapter banner ── */
.chapter-banner {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; padding: 26px 18px 22px; text-align: center;
}
.chap-label { font-size: 11px; letter-spacing: 3px; opacity: .85; font-weight: 700; }
.chap-num { font-size: 40px; font-weight: 900; line-height: 1.1; margin: 2px 0; }
.chap-kanji { font-size: 20px; font-weight: 700; margin-top: 4px; }
.chap-furigana { font-size: 12px; opacity: .8; margin-top: 2px; }
.chap-id { font-size: 13px; opacity: .95; margin-top: 8px; font-weight: 600; }

/* ── Progress bar wrap ── */
#bab-progress-wrap { max-width: 720px; margin: 12px auto 0; padding: 0 14px; }
.bab-progress-track {
  background: var(--card-border); border-radius: 8px; height: 8px; overflow: hidden;
}
.bab-progress-fill { height: 100%; background: var(--brand); transition: width .3s ease; }
.bab-progress-label { font-size: 11px; color: var(--muted); margin-top: 4px; text-align: right; }

/* ── TOC ── */
.toc { background: var(--card-bg); padding: 16px; margin-top: 12px; }
.toc > * { max-width: 720px; margin-left: auto; margin-right: auto; }
.toc h2 { font-size: 11px; letter-spacing: 2px; color: var(--muted); margin: 0 0 10px; }
.toc-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 4px; border-bottom: 1px solid var(--card-border);
  text-decoration: none; color: var(--text);
}
a.toc-row { cursor: pointer; }
a.toc-row:hover, a.toc-row:focus-visible { background: var(--brand-soft); }
.toc-row:last-child { border-bottom: none; }
.toc-sec { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1 1 auto; }
.toc-num {
  background: var(--brand); color: #fff; font-weight: 900; font-size: 12px;
  width: 24px; height: 24px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; flex-shrink: 0;
}
.toc-title { font-size: 14px; font-weight: 700; color: var(--brand); }
.toc-meaning { font-size: 12px; color: var(--muted); }
.toc-id-range { font-size: 11px; color: var(--muted); flex-shrink: 0; }

/* ── Section header ── */
.section-header {
  max-width: 720px; margin: 20px auto 8px; padding: 8px 16px;
  font-size: 13px; font-weight: 800; color: var(--brand);
  display: flex; align-items: center; gap: 8px;
}
.section-header .sec-label {
  background: var(--brand); color: #fff; font-size: 10px; font-weight: 800;
  padding: 2px 8px; border-radius: 10px; letter-spacing: 1px;
}

/* ── Question list / cards ── */
.question-list { background: var(--bg); display: flex; flex-direction: column; gap: 10px; padding: 0 0 6px; }
.question-card {
  max-width: 720px; margin: 0 auto; width: 100%;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 14px; overflow: hidden; scroll-margin-top: 108px;
}
.q-head {
  display: flex; align-items: flex-start; gap: 10px; padding: 14px 16px 10px;
}
.q-num {
  background: var(--brand); color: #fff; font-weight: 900; font-size: 13px;
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; margin-top: 1px;
}
.q-text { font-size: calc(16px * var(--ja-scale)); line-height: 1.7; font-weight: 600; flex: 1; }
.q-underline { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
.q-sub { font-size: 12px; color: var(--muted); font-weight: 400; margin-top: 2px; }

.q-options { list-style: none; margin: 0; padding: 0 16px 14px; display: flex; flex-direction: column; gap: 8px; }
.q-option {
  display: flex; align-items: center; gap: 10px; font-size: calc(15px * var(--ja-scale));
  padding: 10px 12px; border: 1.5px solid var(--card-border); border-radius: 10px;
  cursor: pointer; background: var(--card-bg); user-select: none;
  transition: border-color .15s ease, background .15s ease;
}
.q-option:hover { border-color: var(--brand); }
.q-opt-num {
  font-weight: 700; color: var(--muted2); font-size: 13px; min-width: 18px;
  width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--card-border);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.q-opt-text { flex: 1; }
/* Sembunyikan furigana di dalam opsi jawaban (khususnya soal もじ / baca kanji)
   agar cara baca tidak bocor sebelum dijawab. Ruby tetap dipakai untuk
   markup semantik, hanya <rt> (bacaan kecil) yang disembunyikan. */
.q-opt-text ruby rt { display: none; }
.q-opt-text ruby { ruby-position: normal; }
.q-opt-mark { font-weight: 900; font-size: 15px; flex-shrink: 0; width: 18px; text-align: center; }

/* Sebelum dijawab: opsi netral, tidak ada indikasi jawaban benar/salah */
.question-card:not(.quiz-answered) .q-option .q-opt-mark { display: none; }

/* Setelah dijawab */
.question-card.quiz-answered .q-option { cursor: default; }
.question-card.quiz-answered .q-option:not(.picked):not(.reveal-correct) { opacity: .55; }
.question-card.quiz-answered .q-option.picked.correct {
  border-color: var(--correct-border); background: var(--correct-bg);
}
.question-card.quiz-answered .q-option.picked.correct .q-opt-mark { color: var(--correct-text); }
.question-card.quiz-answered .q-option.picked.correct .q-opt-text { color: var(--correct-text); font-weight: 800; }
.question-card.quiz-answered .q-option.picked.wrong {
  border-color: var(--wrong-text); background: rgba(198,40,40,0.08);
}
.question-card.quiz-answered .q-option.picked.wrong .q-opt-mark { color: var(--wrong-text); }
.question-card.quiz-answered .q-option.picked.wrong .q-opt-text { color: var(--wrong-text); font-weight: 800; }
.question-card.quiz-answered .q-option.reveal-correct:not(.picked) {
  border-color: var(--correct-border); background: var(--correct-bg); opacity: 1;
}
.question-card.quiz-answered .q-option.reveal-correct:not(.picked) .q-opt-mark { color: var(--correct-text); }
.question-card.quiz-answered .q-option.reveal-correct:not(.picked) .q-opt-text { color: var(--correct-text); font-weight: 700; }

.q-quiz-feedback {
  margin: 0 16px 10px; padding: 8px 12px; border-radius: 10px; font-size: 13px; font-weight: 700;
  display: none; align-items: center; gap: 6px;
}
.q-quiz-feedback.show { display: flex; }
.q-quiz-feedback.correct { background: var(--correct-bg); color: var(--correct-text); border: 1px solid var(--correct-border); }
.q-quiz-feedback.wrong { background: rgba(198,40,40,0.08); color: var(--wrong-text); border: 1px solid var(--wrong-text); }

.q-retry-btn {
  margin: 0 16px 12px; padding: 6px 12px; font-size: 12px; font-weight: 700;
  border-radius: 8px; border: 1px solid var(--card-border); background: var(--card-bg);
  color: var(--muted2); cursor: pointer; display: none;
}
.question-card.quiz-answered .q-retry-btn { display: inline-block; }

.q-meta-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 0 16px 12px; flex-wrap: wrap;
}
.q-category-badge {
  font-size: 10px; font-weight: 800; letter-spacing: .5px; color: #fff;
  padding: 3px 9px; border-radius: 10px;
}
.q-category-badge.moji { background: var(--moji-color); }
.q-category-badge.goi { background: var(--goi-color); }
.q-category-badge.bunpou { background: var(--bunpou-color); }
.q-page { font-size: 11px; color: var(--muted); }

/* ── Answer toggle button ── */
.q-answer-toggle {
  width: 100%; text-align: left; background: var(--card-bg-alt);
  border: none; border-top: 1px solid var(--card-border);
  padding: 10px 16px; font-size: 13px; font-weight: 700; color: var(--brand);
  cursor: pointer; display: flex; align-items: center; justify-content: space-between;
}
.q-answer-toggle:hover { background: var(--brand-soft); }
.q-answer-toggle .chev { transition: transform .2s ease; }
.question-card.answer-open .q-answer-toggle .chev { transform: rotate(180deg); }

.q-answer-box {
  display: none; padding: 14px 16px 16px; background: var(--card-bg-alt);
  border-top: 1px solid var(--card-border);
}
.question-card.answer-open .q-answer-box { display: block; }

.q-answer-main {
  font-size: 15px; font-weight: 700; color: var(--correct-text);
  background: var(--correct-bg); border: 1px solid var(--correct-border);
  border-radius: 10px; padding: 10px 12px; margin-bottom: 10px;
  display: flex; align-items: baseline; gap: 8px;
}
.q-answer-num { font-size: 13px; font-weight: 900; }

.q-translation { font-size: 13px; color: var(--muted2); line-height: 1.6; margin-bottom: 10px; }
.q-translation .lang-id { display: block; }

.q-explain-box {
  border: 1px solid var(--card-border); border-radius: 10px; padding: 10px 12px;
  background: var(--card-bg); font-size: 13px; line-height: 1.9;
}
.q-explain-box + .q-explain-box { margin-top: 8px; }
.q-explain-title { font-size: 11px; font-weight: 800; letter-spacing: .5px; margin-bottom: 6px; }
.q-explain-title.moji { color: var(--moji-color); }
.q-explain-title.goi { color: var(--goi-color); }
.q-explain-title.bunpou { color: var(--bunpou-color); }
.q-explain-item { margin-bottom: 9px; }
.q-explain-item:last-child { margin-bottom: 0; }
.q-explain-item .kanji-key { font-weight: 700; }
.q-explain-item .kanji-reading { color: var(--muted); font-weight: 400; }
.q-explain-item .kanji-mean { color: var(--muted2); }
.q-explain-note { font-size: 12px; color: var(--muted); margin-top: 6px; line-height: 1.6; }
.q-explain-example { font-size: 13px; margin-top: 4px; }
.q-explain-example .ex-jp { display: block; }
.q-explain-example .ex-id { display: block; color: var(--muted2); font-size: 12px; margin-top: 1px; }
.q-warn-box {
  margin-top: 8px; border: 1px dashed var(--wrong-text); border-radius: 8px;
  padding: 8px 10px; font-size: 12px; color: var(--wrong-text); background: rgba(198,40,40,0.06);
}

/* ── Bottom nav ── */
.bottom-nav {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 14px; background: var(--card-bg); border-top: 1px solid var(--card-border);
  max-width: 720px; margin: 0 auto;
}
.bottom-nav a, .bottom-nav .disabled {
  font-size: 13px; font-weight: 700; color: var(--brand); text-decoration: none;
  padding: 8px 12px; border-radius: 10px; border: 1px solid var(--card-border);
}
.bottom-nav a:hover { background: var(--brand-soft); }
.bottom-nav .disabled { color: var(--muted); pointer-events: none; }
.bottom-nav a.home { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ── Back to top ── */
#back-to-top {
  position: fixed; right: 16px; bottom: 20px; width: 42px; height: 42px;
  border-radius: 50%; background: var(--brand); color: #fff; border: none;
  font-size: 18px; box-shadow: 0 2px 10px rgba(0,0,0,.25); cursor: pointer;
  display: none; align-items: center; justify-content: center; z-index: 30;
}
#back-to-top.show { display: flex; }

/* ── Index page: chapter list ── */
.hero {
  background: linear-gradient(160deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; padding: 12px 18px 32px; text-align: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: "問";
  position: absolute; top: -8%; left: -6%;
  font-family: 'Noto Serif JP', serif; font-weight: 900;
  font-size: min(48vw, 300px);
  color: rgba(255,255,255,0.05);
  line-height: 1; pointer-events: none; user-select: none;
}
.hero > * { position: relative; z-index: 1; }
.free-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,184,77,0.5);
  color: var(--gold);
  font-family: 'JetBrains Mono', 'Nunito', monospace;
  font-size: 11px; font-weight: 700; letter-spacing: 0.06em;
  padding: 6px 16px; border-radius: 99px;
  margin-bottom: 14px;
}
.free-badge::before { content: "✓"; color: var(--gold); }
.hero-title { font-size: 22px; font-weight: 900; }
.hero-sub { font-size: 13px; opacity: .9; margin-top: 6px; line-height: 1.6; }
#overall-progress-wrap { max-width: 340px; margin: 16px auto 0; }
.overall-progress-track {
  background: rgba(255,255,255,.25); border-radius: 8px; height: 8px; overflow: hidden;
}
.overall-progress-fill { height: 100%; background: #fff; transition: width .3s ease; }
.overall-progress-label { font-size: 12px; opacity: .95; margin-top: 6px; font-weight: 700; }

.chapter-card { position: relative; }
.chapter-progress-badge {
  font-size: 10px; font-weight: 800; color: #fff; background: var(--muted);
  padding: 3px 8px; border-radius: 10px; flex-shrink: 0; white-space: nowrap;
}
.chapter-progress-badge.done { background: var(--correct-border); }
.chapter-progress-badge.partial { background: var(--brand); }
.chapter-list {
  max-width: 720px; margin: 20px auto 36px; padding: 14px 10px 16px;
  display: flex; flex-direction: column; gap: 8px;
  background: linear-gradient(135deg, rgba(255,243,248,0.55) 0%, rgba(255,209,220,0.45) 100%);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255,209,220,0.6); border-radius: 18px;
  box-shadow: 0 2px 8px rgba(46,125,50,0.08);
}
[data-theme="dark"] .chapter-list {
  background: linear-gradient(135deg, rgba(58,24,38,0.55) 0%, rgba(46,20,32,0.45) 100%);
  border-color: rgba(122,46,72,0.6);
  box-shadow: 0 2px 8px rgba(0,0,0,.35);
}
.chapter-card {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 12px; text-decoration: none; color: var(--text);
  transition: all .15s ease;
}
.chapter-card:hover { border-color: var(--brand); transform: translateY(-1px); }
.chapter-num-badge {
  background: var(--brand); color: #fff; font-weight: 900; font-size: 14px;
  width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.chapter-info { flex: 1; min-width: 0; }
.chapter-kanji {
  font-size: 14px; font-weight: 700; color: var(--brand);
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden; text-overflow: ellipsis;
}
.chapter-title {
  font-size: 11px; color: var(--muted2); margin-top: 1px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
  overflow: hidden; text-overflow: ellipsis;
}
.chapter-range { font-size: 10px; color: var(--muted); margin-top: 2px; }
.chevron { font-size: 18px; color: var(--muted); flex-shrink: 0; }

footer { font-family: 'Inter', sans-serif; }

@media print {
  .page-nav, .bottom-nav, #back-to-top, #sw-update-banner, .theme-toggle { display: none !important; }
  .q-answer-box { display: block !important; }
}