/* ============================================================
   QUIZ & EXAM — Shared styles for quiz.html and exam.html
   ============================================================ */

/* Page layout */
.quiz-page {
  min-height: calc(100vh - var(--header-h));
  background: var(--sw-light-bg);
  display: flex;
  flex-direction: column;
}
.quiz-header-bar {
  background: #fff;
  border-bottom: 1px solid var(--sw-border);
  padding: 14px 0;
  position: sticky;
  top: var(--header-h);
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.quiz-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.quiz-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.quiz-module-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}
.quiz-counter {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.quiz-progress-strip {
  height: 4px;
  background: #e8eef5;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}
.quiz-progress-fill {
  height: 100%;
  background: var(--sw-blue);
  transition: width 0.3s ease;
}

/* Main quiz area */
.quiz-body {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px 60px;
}
.quiz-container {
  width: 100%;
  max-width: 720px;
}

/* Dot progress indicators */
.question-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
  justify-content: center;
}
.q-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d0e4f5;
  transition: background var(--transition);
  cursor: default;
}
.q-dot.current   { background: var(--sw-blue); }
.q-dot.answered  { background: var(--sw-blue-dark); }
.q-dot.correct   { background: var(--sw-success); }
.q-dot.incorrect { background: var(--sw-danger); }

/* Question Card */
.question-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--sw-border);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 16px;
}
.question-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 20px;
}
.question-number {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Options */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.option-btn {
  width: 100%;
  text-align: left;
  padding: 14px 18px;
  border-radius: var(--radius);
  border: 2px solid var(--sw-border);
  background: #fff;
  cursor: pointer;
  font-size: 0.925rem;
  color: var(--text-primary);
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), box-shadow var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  line-height: 1.4;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--sw-blue);
  background: var(--sw-blue-light);
}
.option-btn.selected {
  border-color: var(--sw-blue);
  background: var(--sw-blue-light);
  color: var(--sw-dark-alt);
}
.option-btn.correct {
  border-color: var(--sw-success);
  background: var(--sw-success-bg);
  color: #1a5c28;
}
.option-btn.incorrect {
  border-color: var(--sw-danger);
  background: var(--sw-danger-bg);
  color: #7a1520;
}
.option-btn.correct-answer {
  border-color: var(--sw-success);
  background: var(--sw-success-bg);
}
.option-letter {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #eef2f7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition);
}
.option-btn.selected .option-letter   { background: var(--sw-blue); color: #fff; }
.option-btn.correct .option-letter    { background: var(--sw-success); color: #fff; }
.option-btn.incorrect .option-letter  { background: var(--sw-danger); color: #fff; }
.option-btn.correct-answer .option-letter { background: var(--sw-success); color: #fff; }

/* Feedback box */
.feedback-box {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}
.feedback-box.correct-fb  { background: var(--sw-success-bg); color: #1a5c28; border-left: 4px solid var(--sw-success); }
.feedback-box.incorrect-fb { background: var(--sw-danger-bg);  color: #7a1520; border-left: 4px solid var(--sw-danger); }
.feedback-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* Navigation buttons */
.quiz-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px;
}
.quiz-nav .btn-next {
  margin-left: auto;
}

/* ============================================================
   Results Screen
   ============================================================ */
.results-screen {
  width: 100%;
  max-width: 720px;
}
.results-hero {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--sw-border);
  box-shadow: var(--shadow);
  padding: 36px;
  text-align: center;
  margin-bottom: 24px;
}
.results-score-ring {
  margin: 0 auto 20px;
}
.results-score-ring svg { display: block; }
.results-score-ring .ring-track { fill: none; stroke: #e8eef5; stroke-width: 8; }
.results-score-ring .ring-fill  { fill: none; stroke-width: 8; stroke-linecap: round;
  stroke-dasharray: 283; stroke-dashoffset: 283;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.4,0,0.2,1); }
.results-score-ring .ring-score { font-size: 16px; font-weight: 800; text-anchor: middle; dominant-baseline: central; }
.results-score-ring .ring-label { font-size: 10px; text-anchor: middle; dominant-baseline: central; }

.results-verdict {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 4px;
}
.results-verdict.pass { color: var(--sw-success); }
.results-verdict.fail { color: var(--sw-danger); }
.results-detail { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 20px; }
.results-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* Question review */
.review-section {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--sw-border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.review-section-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--sw-border);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.review-item {
  padding: 16px 24px;
  border-bottom: 1px solid var(--sw-border);
}
.review-item:last-child { border-bottom: none; }
.review-q-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}
.review-status {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
  margin-top: 1px;
}
.review-status.ok   { background: var(--sw-success); }
.review-status.bad  { background: var(--sw-danger); }
.review-q-text { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }
.review-answer {
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 6px;
  margin-top: 4px;
}
.review-answer.your-correct { background: var(--sw-success-bg); color: #1a5c28; }
.review-answer.your-wrong   { background: var(--sw-danger-bg);  color: #7a1520; }
.review-answer.correct-ans  { background: var(--sw-success-bg); color: #1a5c28; margin-top: 4px; }
.review-explanation {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 8px;
  padding: 8px 12px;
  background: var(--sw-light-bg);
  border-radius: 6px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 480px) {
  .question-card { padding: 18px; }
  .option-btn { padding: 12px 14px; font-size: 0.875rem; }
  .results-hero { padding: 24px 16px; }
}