/* QuizWise Interactive Quiz Engine - Clean Reference Design */

/* Mobile-First Single-Column Layout */
.quiz-page-container {
  padding: 1rem 1rem 4rem;
  width: 100%;
  box-sizing: border-box;
}

.quiz-single-column {
  max-width: 820px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

/* 1. Large Quiz Title */
.quiz-main-title {
  font-size: clamp(1.75rem, 4.5vw, 2.45rem);
  font-weight: 800;
  color: #000000;
  line-height: 1.22;
  margin: 0.5rem 0 1.25rem 0;
  text-align: left;
  letter-spacing: -0.025em;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (max-width: 600px) {
  .quiz-main-title {
    font-size: 1.65rem;
    line-height: 1.25;
    margin-bottom: 1rem;
  }
}

/* 2. Top Ad Space */
.quiz-top-ad-wrap {
  margin: 0.75rem 0 1.25rem;
  text-align: center;
  min-height: 20px;
}

/* 3. Horizontal Progress Component */
.quiz-progress-component {
  margin: 1.25rem 0;
  width: 100%;
}

.quiz-progress-track {
  width: 100%;
  height: 28px;
  background-color: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  box-sizing: border-box;
}

.quiz-progress-fill {
  height: 100%;
  background-color: #38bdf8; /* Cyan / light blue */
  border-radius: 2px;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 8px;
}

.quiz-progress-text {
  position: absolute;
  width: 100%;
  left: 0;
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #111827;
  pointer-events: none;
  user-select: none;
  z-index: 2;
}

/* 4. Optional Question Image */
.question-image-wrap {
  width: 100%;
  border-radius: 6px;
  overflow: hidden;
  margin: 1.25rem 0;
  background-color: transparent;
}

.quiz-ad-placeholder {
  background-color: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 6px;
  padding: 1rem;
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  margin: 0.75rem 0;
}

.question-image {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  display: block;
  border-radius: 6px;
}

/* 5. Question Text */
.question-text {
  font-size: clamp(1.2rem, 3.5vw, 1.45rem);
  font-weight: 600;
  color: #111827;
  margin: 1.25rem 0;
  line-height: 1.35;
  text-align: left;
}

@media (max-width: 600px) {
  .question-text {
    font-size: 1.15rem;
    margin: 1rem 0;
  }
}

/* 6. 2x2 Answer Grid */
.options-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 1.5rem;
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 600px) {
  .options-grid-2x2 {
    gap: 10px;
    margin-bottom: 1.25rem;
  }
}

.option-btn {
  background-color: #eceef1;
  color: #111827;
  border: 2px solid transparent;
  border-radius: 6px;
  min-height: 130px;
  padding: 1.25rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  user-select: none;
  box-sizing: border-box;
  transition: all 0.15s ease;
  line-height: 1.35;
}

@media (max-width: 600px) {
  .option-btn {
    min-height: 105px;
    font-size: 0.95rem;
    padding: 0.9rem 0.5rem;
  }
}

.option-btn:hover:not(.locked) {
  background-color: #e2e5e9;
}

/* Selected state */
.option-btn.selected {
  border-color: #06b6d4;
  background-color: #e0f2fe;
  color: #0284c7;
  box-shadow: 0 0 0 1px #06b6d4;
}

/* Correct state */
.option-btn.correct {
  border-color: #22c55e !important;
  background-color: #dcfce7 !important;
  color: #15803d !important;
  box-shadow: 0 0 0 1px #22c55e !important;
}

/* Wrong state */
.option-btn.wrong {
  border-color: #ef4444 !important;
  background-color: #fee2e2 !important;
  color: #b91c1c !important;
  box-shadow: 0 0 0 1px #ef4444 !important;
}

.option-btn.locked {
  cursor: default;
}

/* 7. Bottom Ad Space */
.quiz-bottom-ad-wrap {
  margin: 1.5rem 0 2rem;
  text-align: center;
  min-height: 20px;
}

/* 8. Large Back to Top Button */
.btn-back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 64px;
  background-color: #dc2626; /* Bright Red */
  color: #ffffff;
  font-size: clamp(1.2rem, 3.5vw, 1.45rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin: 1.5rem 0 3.5rem;
  box-sizing: border-box;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-back-to-top:hover {
  background-color: #b91c1c;
}

.btn-back-to-top:active {
  transform: scale(0.99);
}

@media (max-width: 600px) {
  .btn-back-to-top {
    height: 56px;
    font-size: 1.2rem;
    margin: 1.25rem 0 2.5rem;
  }
}

/* ========================================================
   Quiz Result Screen (Preserved and Refined)
   ======================================================== */
.result-container {
  max-width: 820px;
  margin: 1.5rem auto 4rem;
}

.result-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 2.5rem;
}

.result-badge {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.result-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.result-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.result-stats-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.result-stat-box {
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 2rem;
  min-width: 140px;
}

.result-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
}

.result-stat-value.success { color: var(--color-success); }
.result-stat-value.danger { color: var(--color-danger); }

.result-stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Review Section */
.review-section {
  margin-top: 3rem;
}

.review-header {
  margin-bottom: 1.5rem;
}

.review-item {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.review-item.correct {
  border-left: 5px solid var(--color-success);
}

.review-item.incorrect {
  border-left: 5px solid var(--color-danger);
}

.review-q-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 0.35rem;
}

.review-question {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.review-answers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-ans-box {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.review-ans-box.user-choice {
  background-color: #f1f5f9;
  border: 1px solid #cbd5e1;
}

.review-ans-box.correct-choice {
  background-color: var(--color-success-light);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.review-ans-box.incorrect-choice {
  background-color: var(--color-danger-light);
  border: 1px solid #fecaca;
  color: #991b1b;
}

.review-explanation {
  background-color: #f8fafc;
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border: 1px solid #e2e8f0;
}

@media (max-width: 640px) {
  .review-answers-grid { grid-template-columns: 1fr; }
  .result-stats-row { gap: 1rem; }
  .result-stat-box { min-width: 100px; padding: 1rem; }
}