/**
 * CD-IELTS Authentic Single-Choice Multiple Choice Stylesheet
 * Computer-Delivered IELTS Full-Width Option Cards with Letter Badges
 * Design System Harmonized with English Mastery Hub Design Tokens
 */

.cd-ielts-mcq-container {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
}

.cd-ielts-mcq-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  min-height: 44px;
  background-color: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}

.cd-ielts-mcq-card:hover:not(:disabled) {
  background-color: #f8fafc;
  border-color: #cbd5e1;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.05);
}

.cd-ielts-mcq-card:focus-visible {
  outline: 2px solid #0284c7;
  outline-offset: 2px;
}

/* Custom Authentic CD-IELTS Radio Circle Indicator */
.cd-ielts-mcq-card .mcq-radio-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid #94a3b8;
  background-color: #ffffff;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

.cd-ielts-mcq-card .mcq-radio-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: transparent;
  transition: background-color 0.15s ease, transform 0.15s ease;
  transform: scale(0);
}

/* Option Letter Badge (A, B, C, D) */
.cd-ielts-mcq-card .mcq-letter-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background-color: #f1f5f9;
  color: #475569;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all 0.15s ease;
}

/* Option Text */
.cd-ielts-mcq-card .mcq-option-text {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 0.875rem;
  line-height: 1.45;
  color: #334155;
  flex-grow: 1;
}

/* Active Selected State (Authentic CD-IELTS Sky Active) */
.cd-ielts-mcq-card.is-selected {
  background-color: #f0f9ff !important;
  border-color: #0284c7 !important;
  box-shadow: 0 0 0 1px #0284c7, 0 2px 6px rgba(2, 132, 199, 0.1) !important;
}

.cd-ielts-mcq-card.is-selected .mcq-radio-circle {
  border-color: #0284c7 !important;
  background-color: #ffffff !important;
}

.cd-ielts-mcq-card.is-selected .mcq-radio-dot {
  background-color: #0284c7 !important;
  transform: scale(1) !important;
}

.cd-ielts-mcq-card.is-selected .mcq-letter-badge {
  background-color: #0284c7 !important;
  color: #ffffff !important;
}

.cd-ielts-mcq-card.is-selected .mcq-option-text {
  color: #0f172a !important;
  font-weight: 500;
}

/* Review / Graded States */
.cd-ielts-mcq-card.is-correct {
  background-color: #ecfdf5 !important;
  border-color: #10b981 !important;
  box-shadow: 0 0 0 1px #10b981, 0 2px 4px rgba(16, 185, 129, 0.1) !important;
}

.cd-ielts-mcq-card.is-correct .mcq-radio-circle {
  border-color: #10b981 !important;
}

.cd-ielts-mcq-card.is-correct .mcq-radio-dot {
  background-color: #10b981 !important;
  transform: scale(1) !important;
}

.cd-ielts-mcq-card.is-correct .mcq-letter-badge {
  background-color: #10b981 !important;
  color: #ffffff !important;
}

.cd-ielts-mcq-card.is-incorrect {
  background-color: #fef2f2 !important;
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 1px #ef4444, 0 2px 4px rgba(239, 68, 68, 0.1) !important;
}

.cd-ielts-mcq-card.is-incorrect .mcq-radio-circle {
  border-color: #ef4444 !important;
}

.cd-ielts-mcq-card.is-incorrect .mcq-radio-dot {
  background-color: #ef4444 !important;
  transform: scale(1) !important;
}

.cd-ielts-mcq-card.is-incorrect .mcq-letter-badge {
  background-color: #ef4444 !important;
  color: #ffffff !important;
}

/* Key disclosure badge for review mode */
.cd-ielts-mcq-card.is-correct-target {
  position: relative;
  border-style: dashed !important;
  border-color: #059669 !important;
  background-color: #f0fdf4 !important;
}

.cd-ielts-mcq-card.is-correct-target .mcq-letter-badge {
  background-color: #059669 !important;
  color: #ffffff !important;
}

.cd-ielts-mcq-card.is-correct-target::after {
  content: '✔ Correct Answer';
  position: absolute;
  top: -10px;
  right: 12px;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #059669;
  background-color: #dcfce7;
  padding: 1px 8px;
  border-radius: 4px;
  border: 1px solid #bbf7d0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Hide original inputs cleanly */
.cd-ielts-mcq-raw-hidden,
label.cd-ielts-mcq-raw-hidden,
div.cd-ielts-mcq-raw-hidden {
  display: none !important;
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Dark Mode Harmonization */
.theme-dark .cd-ielts-mcq-card,
[data-theme='dark'] .cd-ielts-mcq-card,
.dark .cd-ielts-mcq-card,
body.dark-mode .cd-ielts-mcq-card {
  background-color: #1e293b;
  border-color: #334155;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.theme-dark .cd-ielts-mcq-card:hover:not(:disabled),
[data-theme='dark'] .cd-ielts-mcq-card:hover:not(:disabled),
.dark .cd-ielts-mcq-card:hover:not(:disabled),
body.dark-mode .cd-ielts-mcq-card:hover:not(:disabled) {
  background-color: #334155;
  border-color: #475569;
}

.theme-dark .cd-ielts-mcq-card .mcq-radio-circle,
[data-theme='dark'] .cd-ielts-mcq-card .mcq-radio-circle,
.dark .cd-ielts-mcq-card .mcq-radio-circle,
body.dark-mode .cd-ielts-mcq-card .mcq-radio-circle {
  background-color: #0f172a;
  border-color: #64748b;
}

.theme-dark .cd-ielts-mcq-card .mcq-letter-badge,
[data-theme='dark'] .cd-ielts-mcq-card .mcq-letter-badge,
.dark .cd-ielts-mcq-card .mcq-letter-badge,
body.dark-mode .cd-ielts-mcq-card .mcq-letter-badge {
  background-color: #0f172a;
  color: #94a3b8;
}

.theme-dark .cd-ielts-mcq-card .mcq-option-text,
[data-theme='dark'] .cd-ielts-mcq-card .mcq-option-text,
.dark .cd-ielts-mcq-card .mcq-option-text,
body.dark-mode .cd-ielts-mcq-card .mcq-option-text {
  color: #cbd5e1;
}

.theme-dark .cd-ielts-mcq-card.is-selected,
[data-theme='dark'] .cd-ielts-mcq-card.is-selected,
.dark .cd-ielts-mcq-card.is-selected,
body.dark-mode .cd-ielts-mcq-card.is-selected {
  background-color: rgba(2, 132, 199, 0.18) !important;
  border-color: #38bdf8 !important;
  box-shadow: 0 0 0 1px #38bdf8 !important;
}

.theme-dark .cd-ielts-mcq-card.is-selected .mcq-option-text,
[data-theme='dark'] .cd-ielts-mcq-card.is-selected .mcq-option-text,
.dark .cd-ielts-mcq-card.is-selected .mcq-option-text,
body.dark-mode .cd-ielts-mcq-card.is-selected .mcq-option-text {
  color: #f8fafc !important;
}

.theme-dark .cd-ielts-mcq-card.is-correct,
[data-theme='dark'] .cd-ielts-mcq-card.is-correct,
.dark .cd-ielts-mcq-card.is-correct,
body.dark-mode .cd-ielts-mcq-card.is-correct {
  background-color: rgba(16, 185, 129, 0.18) !important;
  border-color: #34d399 !important;
}

.theme-dark .cd-ielts-mcq-card.is-incorrect,
[data-theme='dark'] .cd-ielts-mcq-card.is-incorrect,
.dark .cd-ielts-mcq-card.is-incorrect,
body.dark-mode .cd-ielts-mcq-card.is-incorrect {
  background-color: rgba(239, 68, 68, 0.18) !important;
  border-color: #f87171 !important;
}