@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Kaisei+Decol:wght@400;700&display=swap');

:root {
  --ink: #1a1a2e;
  --ink-mid: #2d2d4a;
  --ink-light: #4a4a6a;
  --paper: #faf8f3;
  --paper-warm: #f5f0e8;
  --paper-border: #e8dfd0;
  --red: #c0392b;
  --red-light: #e74c3c;
  --gold: #c9a84c;
  --gold-light: #f0c75e;
  --green: #27ae60;
  --green-light: #2ecc71;
  --blue-accent: #2980b9;
  --correct: #1a6b3c;
  --correct-bg: #e8f5ed;
  --wrong: #8b1a1a;
  --wrong-bg: #fbe8e8;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.1);
  --transition: 0.28s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  position: relative;
  overflow-x: hidden;
}

/* Background pattern */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, var(--paper-border) 39px, var(--paper-border) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, var(--paper-border) 39px, var(--paper-border) 40px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '日本語';
  position: fixed;
  right: -30px;
  top: 50%;
  transform: translateY(-50%) rotate(90deg);
  font-family: 'Kaisei Decol', serif;
  font-size: 6rem;
  color: var(--paper-border);
  letter-spacing: 0.5rem;
  pointer-events: none;
  z-index: 0;
  white-space: nowrap;
}

/* ── CONTAINER ── */
#app {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
}

/* ── SCREENS ── */
.screen { display: none; animation: fadeIn .4s ease; }
.screen.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CARD BASE ── */
.card {
  background: white;
  border: 1px solid var(--paper-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

/* ── HEADER BANNER ── */
.quiz-header {
  background: var(--ink);
  color: white;
  padding: 28px 32px 24px;
  position: relative;
  overflow: hidden;
}
.quiz-header::before {
  content: '';
  position: absolute;
  right: -20px; top: -20px;
  width: 120px; height: 120px;
  border: 3px solid rgba(255,255,255,0.08);
  border-radius: 50%;
}
.quiz-header::after {
  content: '';
  position: absolute;
  right: 20px; top: 20px;
  width: 60px; height: 60px;
  border: 2px solid rgba(255,255,255,0.1);
  border-radius: 50%;
}
.quiz-badge {
  display: inline-block;
  background: var(--gold);
  color: var(--ink);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.quiz-header h1 {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.quiz-header p {
  opacity: 0.65;
  font-size: 0.85rem;
  margin-top: 6px;
  font-weight: 300;
}

/* ── PROGRESS BAR ── */
.progress-wrap {
  padding: 16px 32px 0;
  background: white;
}
.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.78rem;
  color: var(--ink-light);
  font-weight: 500;
}
.progress-track {
  height: 5px;
  background: var(--paper-warm);
  border-radius: 99px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--red) 100%);
  border-radius: 99px;
  transition: width .5s cubic-bezier(.4,0,.2,1);
}

/* ── QUESTION BODY ── */
.question-body {
  padding: 24px 32px 12px;
  background: white;
}
.question-num {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 10px;
}
.question-text {
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
}
.question-furigana {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-light);
  margin-top: 5px;
  font-weight: 300;
  letter-spacing: 0.05em;
}

/* ── OPTIONS ── */
.options-grid {
  padding: 16px 32px 28px;
  background: white;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--paper-warm);
  border: 2px solid var(--paper-border);
  border-radius: 10px;
  padding: 14px 16px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--ink);
  transition: var(--transition);
  line-height: 1.4;
  position: relative;
  overflow: hidden;
}
.option-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold-light);
  opacity: 0;
  transition: opacity .2s;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0,0,0,0.09);
}
.option-btn:hover:not(:disabled)::before { opacity: 0.15; }

.option-letter {
  flex-shrink: 0;
  width: 26px; height: 26px;
  background: white;
  border: 2px solid var(--paper-border);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--ink-light);
  transition: var(--transition);
}
.option-btn:hover:not(:disabled) .option-letter {
  background: var(--gold);
  border-color: var(--gold);
  color: white;
}

.option-btn.answered { pointer-events: none; }
.option-btn.selected-review {
  border-color: var(--gold);
  background: #fffbf0;
}
.option-btn.selected-review .option-letter {
  background: var(--gold); border-color: var(--gold); color: white;
}

/* ── DIVIDER ── */
.card-divider { height: 1px; background: var(--paper-border); margin: 0 32px; }

/* ── CONFIRMATION SCREEN ── */
.confirm-wrap { padding: 32px; text-align: center; }
.confirm-icon {
  font-size: 3rem; margin-bottom: 16px; display: block;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}
.confirm-wrap h2 {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.confirm-wrap p { color: var(--ink-light); font-size: 0.9rem; margin-bottom: 28px; }

.answers-summary {
  background: var(--paper-warm);
  border: 1px solid var(--paper-border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 24px;
  text-align: left;
}
.answers-summary h3 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 12px;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.summary-item {
  aspect-ratio: 1;
  border-radius: 8px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  border: 2px solid var(--paper-border);
  background: white;
  font-size: 0.7rem;
  cursor: pointer;
  transition: var(--transition);
}
.summary-item:hover { border-color: var(--gold); transform: scale(1.05); }
.summary-item .s-num { font-weight: 700; font-size: 0.85rem; color: var(--ink); }
.summary-item .s-ans { color: var(--gold); font-weight: 600; }

.btn-row { display: flex; gap: 12px; }
.btn {
  flex: 1;
  padding: 14px 20px;
  border-radius: 10px;
  border: none;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.02em;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.14); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--ink); color: white; }
.btn-primary:hover { background: var(--ink-mid); }
.btn-secondary { background: var(--paper-warm); color: var(--ink); border: 2px solid var(--paper-border); }
.btn-secondary:hover { border-color: var(--gold); }
.btn-danger { background: var(--red); color: white; }
.btn-danger:hover { background: var(--red-light); }
.btn-success { background: var(--green); color: white; }
.btn-success:hover { background: var(--green-light); }

/* ── RESULT SCREEN ── */
.result-header {
  background: var(--ink);
  color: white;
  padding: 28px 32px;
  text-align: center;
}
.result-header h2 {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.6rem;
  margin-bottom: 6px;
}
.result-header p { opacity: 0.65; font-size: 0.85rem; }

.donut-section {
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.donut-wrap {
  position: relative;
  width: 180px; height: 180px;
}
.donut-wrap svg { transform: rotate(-90deg); }
.donut-bg { fill: none; stroke: var(--paper-warm); stroke-width: 18; }
.donut-correct { fill: none; stroke: var(--green); stroke-width: 18; stroke-linecap: round; transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1); }
.donut-wrong { fill: none; stroke: var(--red); stroke-width: 18; stroke-linecap: round; transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1) 0.1s; }
.donut-center {
  position: absolute;
  inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
}
.donut-pct { font-family: 'Kaisei Decol', serif; font-size: 2.2rem; font-weight: 700; line-height: 1; }
.donut-label { font-size: 0.7rem; color: var(--ink-light); margin-top: 4px; letter-spacing: 0.08em; }

.stats-row {
  display: flex;
  gap: 16px;
  width: 100%;
}
.stat-box {
  flex: 1;
  background: var(--paper-warm);
  border: 1px solid var(--paper-border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.stat-box::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
}
.stat-box.total::after { background: var(--gold); }
.stat-box.correct::after { background: var(--green); }
.stat-box.wrong::after { background: var(--red); }
.stat-val { font-family: 'Kaisei Decol', serif; font-size: 2rem; font-weight: 700; }
.stat-box.total .stat-val { color: var(--ink); }
.stat-box.correct .stat-val { color: var(--correct); }
.stat-box.wrong .stat-val { color: var(--wrong); }
.stat-label { font-size: 0.72rem; color: var(--ink-light); margin-top: 4px; letter-spacing: 0.06em; font-weight: 500; }

.donut-legend {
  display: flex; gap: 20px;
}
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; color: var(--ink-light); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.legend-dot.c { background: var(--green); }
.legend-dot.w { background: var(--red); }

/* ── REVIEW ── */
.review-section { padding: 24px 32px; }
.review-section h3 {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-light); margin-bottom: 16px;
}
.review-list { display: flex; flex-direction: column; gap: 14px; }
.review-item {
  border: 2px solid var(--paper-border);
  border-radius: 10px;
  overflow: hidden;
}
.review-item.correct { border-color: #a8d5b5; }
.review-item.wrong { border-color: #f0b0b0; }
.review-q {
  padding: 12px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  display: flex; align-items: flex-start; gap: 10px;
}
.review-item.correct .review-q { background: var(--correct-bg); color: var(--correct); }
.review-item.wrong .review-q { background: var(--wrong-bg); color: var(--wrong); }
.review-status {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
}
.review-item.correct .review-status { background: var(--green); color: white; }
.review-item.wrong .review-status { background: var(--red); color: white; }
.review-answers { padding: 12px 16px; display: flex; flex-direction: column; gap: 6px; }
.review-opt {
  font-size: 0.82rem;
  padding: 6px 10px;
  border-radius: 6px;
  display: flex; align-items: center; gap: 8px;
}
.review-opt.correct-opt { background: var(--correct-bg); color: var(--correct); font-weight: 600; }
.review-opt.wrong-opt { background: var(--wrong-bg); color: var(--wrong); }
.review-opt .opt-tag { font-weight: 700; min-width: 18px; }
.review-explanation {
  padding: 8px 16px 12px;
  font-size: 0.78rem;
  color: var(--ink-light);
  border-top: 1px solid var(--paper-border);
  line-height: 1.5;
}

/* ── RESULT ACTIONS ── */
.result-actions { padding: 0 32px 28px; display: flex; gap: 12px; }

/* ── RESPONSIVE ── */
@media (max-width: 560px) {
  .quiz-header { padding: 22px 20px 18px; }
  .quiz-header h1 { font-size: 1.35rem; }
  .progress-wrap { padding: 14px 20px 0; }
  .question-body { padding: 18px 20px 10px; }
  .options-grid { padding: 12px 20px 20px; grid-template-columns: 1fr; gap: 10px; }
  .card-divider { margin: 0 20px; }
  .confirm-wrap { padding: 24px 20px; }
  .summary-grid { grid-template-columns: repeat(5, 1fr); }
  .result-header { padding: 22px 20px; }
  .donut-section { padding: 24px 20px; }
  .stats-row { gap: 10px; }
  .stat-val { font-size: 1.6rem; }
  .review-section { padding: 20px; }
  .result-actions { padding: 0 20px 24px; flex-direction: column; }
  body::after { display: none; }
}

@media (max-width: 360px) {
  .summary-grid { grid-template-columns: repeat(4, 1fr); }
  .btn-row { flex-direction: column; }
}

/* ══════════════════════════════════════
   TIMER BOX
══════════════════════════════════════ */
.quiz-header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.timer-box {
  flex-shrink: 0;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 10px;
  padding: 10px 14px;
  text-align: center;
  min-width: 72px;
  backdrop-filter: blur(4px);
}
.timer-icon {
  display: block;
  font-size: 1rem;
  margin-bottom: 2px;
}
.timer-val {
  display: block;
  font-family: 'Kaisei Decol', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  letter-spacing: 0.05em;
  line-height: 1;
}
.timer-label {
  display: block;
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.55);
  margin-top: 3px;
  font-weight: 600;
}

/* ══════════════════════════════════════
   REVIEW NAV (Tinjau Ulang — mode read-only)
══════════════════════════════════════ */
.review-nav {
  padding: 16px 32px 24px;
  background: #fffbf0;
  border-top: 2px dashed var(--gold);
}
.review-nav-info {
  font-size: 0.78rem;
  color: var(--ink-light);
  text-align: center;
  margin-bottom: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.review-nav-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-sm {
  padding: 10px 16px !important;
  font-size: 0.82rem !important;
  flex: 0 0 auto !important;
}

/* options disabled saat review-mode */
.option-btn.review-mode {
  cursor: default !important;
  opacity: 0.75;
}
.option-btn.review-mode:hover {
  transform: none !important;
  box-shadow: none !important;
  border-color: var(--paper-border) !important;
}
.option-btn.review-mode.selected-review {
  border-color: var(--gold) !important;
  opacity: 1;
}

/* ══════════════════════════════════════
   WAKTU PENGERJAAN (Result Screen)
══════════════════════════════════════ */
.stat-time-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--ink);
  color: white;
  border-radius: 12px;
  padding: 14px 24px;
  width: 100%;
}
.stat-time-icon { font-size: 1.6rem; }
.stat-time-val {
  font-family: 'Kaisei Decol', serif;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
}
.stat-time-label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  opacity: 0.6;
  margin-top: 3px;
  font-weight: 600;
}

/* ══════════════════════════════════════
   RESPONSIVE UPDATES
══════════════════════════════════════ */
@media (max-width: 560px) {
  .quiz-header-top { gap: 12px; }
  .timer-box { min-width: 62px; padding: 8px 10px; }
  .timer-val { font-size: 1.1rem; }
  .review-nav { padding: 14px 20px 20px; }
  .review-nav-btns { gap: 8px; }
  .btn-sm { padding: 9px 12px !important; font-size: 0.78rem !important; }
  .stat-time-box { padding: 12px 18px; }
  .stat-time-val { font-size: 1.35rem; }
}