/* --- MODULE QUIZ (PREMIUM) --- */

#quizOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.85); /* Semi-transparent dark blue */
  backdrop-filter: blur(5px);
  z-index: 10000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

#quizOverlay.show {
  opacity: 1;
  visibility: visible;
}

.quiz-container {
  background: #ffffff;
  width: 90%;
  max-width: 600px;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Header & Progress */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.quiz-header h3 {
  margin: 0;
  font-size: 20px;
  color: #1e293b;
  display: flex;
  align-items: center;
  gap: 8px;
}

.quiz-close {
  background: #f1f5f9;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.quiz-close:hover {
  background: #e2e8f0;
  color: #0f172a;
}

.quiz-progress-text {
  font-size: 14px;
  font-weight: 600;
  color: #64748b;
}

.quiz-progress-bar {
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  margin-bottom: 24px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: #8b5cf6; /* Purple for Quiz */
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* Question Area */
.quiz-question-text {
  font-size: 18px;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 20px;
  line-height: 1.4;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quiz-option {
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
  font-size: 16px;
  color: #334155;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.quiz-option:hover:not(:disabled) {
  background: #f1f5f9;
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

.quiz-option:active:not(:disabled) {
  transform: translateY(1px);
}

.quiz-option:disabled {
  cursor: default;
}

/* Result States */
.quiz-option.correct {
  background: #f0fdf4;
  border-color: #22c55e;
  color: #166534;
}

.quiz-option.wrong {
  background: #fef2f2;
  border-color: #ef4444;
  color: #991b1b;
}

/* Explanation */
.quiz-explanation {
  margin-top: 20px;
  padding: 16px;
  border-radius: 12px;
  background: #eff6ff;
  border-left: 4px solid #3b82f6;
  font-size: 14px;
  color: #1e3a8a;
  display: none;
  animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-next-btn {
  margin-top: 20px;
  background: #8b5cf6;
  color: white;
  border: none;
  border-radius: 10px;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: none;
  width: 100%;
  transition: background 0.2s, transform 0.1s;
}

.quiz-next-btn:hover { background: #7c3aed; }
.quiz-next-btn:active { transform: scale(0.98); }

/* Score Screen */
.quiz-score-container {
  text-align: center;
  padding: 20px 0;
}

.quiz-score-emoji {
  font-size: 64px;
  margin-bottom: 16px;
}

.quiz-score-title {
  font-size: 24px;
  color: #0f172a;
  margin-bottom: 8px;
}

.quiz-score-desc {
  color: #64748b;
  margin-bottom: 24px;
  font-size: 16px;
}

.quiz-score-number {
  font-size: 32px;
  font-weight: 800;
  color: #8b5cf6;
  margin-bottom: 24px;
  background: #f5f3ff;
  display: inline-block;
  padding: 12px 32px;
  border-radius: 100px;
}

/* Dark Mode Support */
body.dark-mode .quiz-container { background: #1e293b; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.5); }
body.dark-mode .quiz-header h3 { color: #f1f5f9; }
body.dark-mode .quiz-close { background: #334155; color: #94a3b8; }
body.dark-mode .quiz-close:hover { background: #475569; color: #f1f5f9; }
body.dark-mode .quiz-progress-bar { background: #334155; }
body.dark-mode .quiz-question-text { color: #f1f5f9; }
body.dark-mode .quiz-option { background: #0f172a; border-color: #334155; color: #cbd5e1; }
body.dark-mode .quiz-option:hover:not(:disabled) { background: #1e293b; border-color: #475569; }
body.dark-mode .quiz-option.correct { background: rgba(34, 197, 94, 0.1); border-color: #22c55e; color: #4ade80; }
body.dark-mode .quiz-option.wrong { background: rgba(239, 68, 68, 0.1); border-color: #ef4444; color: #f87171; }
body.dark-mode .quiz-explanation { background: rgba(59, 130, 246, 0.1); border-color: #3b82f6; color: #93c5fd; }
body.dark-mode .quiz-score-title { color: #f1f5f9; }
body.dark-mode .quiz-score-desc { color: #94a3b8; }
body.dark-mode .quiz-score-number { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }

/* ==================== RESPONSIVE MOBILE QUIZ RULES ==================== */
@media (max-width: 640px) {
  #quizOverlay {
    padding: 8px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }
  .quiz-container {
    width: 100% !important;
    max-width: min(420px, calc(100vw - 16px)) !important;
    max-height: min(88dvh, calc(100vh - 20px)) !important;
    padding: 14px 14px 16px !important;
    border-radius: 18px !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior: contain !important;
  }
  .quiz-header h3 {
    font-size: 16px !important;
  }
  .quiz-question-text {
    font-size: 14px !important;
    margin-bottom: 12px !important;
  }
  .quiz-option {
    padding: 10px 12px !important;
    font-size: 13px !important;
    min-height: 42px !important;
  }
  .quiz-score-emoji {
    font-size: 44px !important;
    margin-bottom: 10px !important;
  }
  .quiz-score-title {
    font-size: 18px !important;
  }
  .quiz-score-desc {
    font-size: 13px !important;
    margin-bottom: 14px !important;
  }
  .quiz-score-number {
    font-size: 24px !important;
    padding: 8px 24px !important;
    margin-bottom: 16px !important;
  }
}