/**
 * CD-IELTS Authentic True / False / Not Given & Yes / No / Not Given Stylesheet
 * Computer-Delivered IELTS 3-State Segmented Toggle Controls
 * Design System Harmonized with English Mastery Hub Design Tokens
 */

.cd-ielts-tfng-group {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
  flex-wrap: wrap;
}

.cd-ielts-tfng-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.375rem 0.875rem;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  color: #334155;
  background-color: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 9999px;
  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, 0.04);
}

.cd-ielts-tfng-btn:hover:not(:disabled) {
  background-color: #f8fafc;
  border-color: #94a3b8;
  color: #0f172a;
  transform: translateY(-1px);
}

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

/* Badge Letter inside pill (T, F, NG / Y, N, NG) */
.cd-ielts-tfng-btn .tfng-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  background-color: #f1f5f9;
  color: #64748b;
  transition: all 0.15s ease;
}

/* Active Selected State (Authentic CD-IELTS Sky Active) */
.cd-ielts-tfng-btn.is-selected {
  background-color: #f0f9ff !important;
  border-color: #0284c7 !important;
  color: #0369a1 !important;
  box-shadow: 0 0 0 1px #0284c7, 0 2px 4px rgba(2, 132, 199, 0.12) !important;
}

.cd-ielts-tfng-btn.is-selected .tfng-badge {
  background-color: #0284c7 !important;
  color: #ffffff !important;
}

/* Review / Graded States */
.cd-ielts-tfng-btn.is-correct {
  background-color: #ecfdf5 !important;
  border-color: #10b981 !important;
  color: #047857 !important;
  box-shadow: 0 0 0 1px #10b981, 0 2px 4px rgba(16, 185, 129, 0.12) !important;
}

.cd-ielts-tfng-btn.is-correct .tfng-badge {
  background-color: #10b981 !important;
  color: #ffffff !important;
}

.cd-ielts-tfng-btn.is-incorrect {
  background-color: #fef2f2 !important;
  border-color: #ef4444 !important;
  color: #b91c1c !important;
  box-shadow: 0 0 0 1px #ef4444, 0 2px 4px rgba(239, 68, 68, 0.12) !important;
}

.cd-ielts-tfng-btn.is-incorrect .tfng-badge {
  background-color: #ef4444 !important;
  color: #ffffff !important;
}

/* Key disclosure badge for review mode */
.cd-ielts-tfng-btn.is-target-key {
  position: relative;
  border-style: dashed !important;
  border-color: #059669 !important;
  background-color: #f0fdf4 !important;
  color: #047857 !important;
}

.cd-ielts-tfng-btn.is-target-key::after {
  content: '✔ Correct Key';
  position: absolute;
  top: -18px;
  right: 0;
  font-size: 0.65rem;
  font-weight: 700;
  color: #059669;
  background-color: #dcfce7;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid #bbf7d0;
  line-height: 1.2;
}

/* Hide original raw inputs cleanly without breaking form submission or script reads */
.cd-ielts-tfng-raw-hidden {
  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;
}

label.cd-ielts-tfng-raw-hidden,
div.cd-ielts-tfng-raw-hidden {
  display: none !important;
}

/* Dark Mode Harmonization */
.theme-dark .cd-ielts-tfng-btn,
[data-theme='dark'] .cd-ielts-tfng-btn,
.dark .cd-ielts-tfng-btn,
body.dark-mode .cd-ielts-tfng-btn {
  background-color: #1e293b;
  border-color: #334155;
  color: #e2e8f0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

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

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

.theme-dark .cd-ielts-tfng-btn.is-selected,
[data-theme='dark'] .cd-ielts-tfng-btn.is-selected,
.dark .cd-ielts-tfng-btn.is-selected,
body.dark-mode .cd-ielts-tfng-btn.is-selected {
  background-color: rgba(2, 132, 199, 0.2) !important;
  border-color: #38bdf8 !important;
  color: #7dd3fc !important;
  box-shadow: 0 0 0 1px #38bdf8 !important;
}

.theme-dark .cd-ielts-tfng-btn.is-selected .tfng-badge,
[data-theme='dark'] .cd-ielts-tfng-btn.is-selected .tfng-badge,
.dark .cd-ielts-tfng-btn.is-selected .tfng-badge,
body.dark-mode .cd-ielts-tfng-btn.is-selected .tfng-badge {
  background-color: #0284c7 !important;
  color: #ffffff !important;
}

.theme-dark .cd-ielts-tfng-btn.is-correct,
[data-theme='dark'] .cd-ielts-tfng-btn.is-correct,
.dark .cd-ielts-tfng-btn.is-correct,
body.dark-mode .cd-ielts-tfng-btn.is-correct {
  background-color: rgba(16, 185, 129, 0.2) !important;
  border-color: #34d399 !important;
  color: #6ee7b7 !important;
}

.theme-dark .cd-ielts-tfng-btn.is-incorrect,
[data-theme='dark'] .cd-ielts-tfng-btn.is-incorrect,
.dark .cd-ielts-tfng-btn.is-incorrect,
body.dark-mode .cd-ielts-tfng-btn.is-incorrect {
  background-color: rgba(239, 68, 68, 0.2) !important;
  border-color: #f87171 !important;
  color: #fca5a5 !important;
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .cd-ielts-tfng-group {
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 0.35rem !important;
    width: 100% !important;
    max-width: 100% !important;
  }
  .cd-ielts-tfng-btn {
    min-width: 0 !important;
    width: 100% !important;
    justify-content: center !important;
    padding: 0.4rem 0.25rem !important;
    font-size: 0.72rem !important;
    gap: 0.3rem !important;
    white-space: nowrap !important;
    min-height: 38px !important;
  }
  .cd-ielts-tfng-btn .tfng-badge {
    width: 18px !important;
    height: 18px !important;
    font-size: 0.6875rem !important;
    flex-shrink: 0 !important;
  }
}

/* Defensive Scope Protection for Label Span inside CD-IELTS TFNG Button */
.cd-ielts-tfng-btn .tfng-label {
  display: inline !important;
  width: auto !important;
  max-width: none !important;
  padding: 0 !important;
  margin: 0 !important;
  border: none !important;
  border-radius: 0 !important;
  background: transparent !important;
  color: inherit !important;
  font-weight: inherit !important;
  box-shadow: none !important;
}