/* ============================================
   INTERACTIVE — Quiz, POE, Code Stepper
   ============================================ */

/* ===== QUIZ ===== */
.quiz {
  max-width: 700px;
  margin: 24px auto;
}

.quiz-question {
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-align: center;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quiz-option {
  background: var(--bg-surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
  user-select: none;
}

.quiz-option:hover:not(.quiz-option--answered) {
  border-color: var(--accent-border);
  background: var(--accent-light);
  transform: translateX(4px);
}

.quiz-option--correct {
  border-color: var(--success) !important;
  background: var(--success-light) !important;
  color: var(--text-primary);
  transform: none !important;
}

.quiz-option--wrong {
  border-color: var(--error) !important;
  background: var(--error-light) !important;
  color: var(--text-primary);
  transform: none !important;
  opacity: 0.7;
}

.quiz-option--dimmed {
  opacity: 0.5;
  cursor: default;
}

.quiz-explanation {
  display: none;
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-surface-2);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--success);
  animation: fadeSlideUp 0.3s ease;
}

.quiz-explanation.visible {
  display: block;
}

/* ===== PREDICT-OBSERVE-EXPLAIN (POE) ===== */
.poe {
  max-width: 700px;
  margin: 24px auto;
}

.poe-phase {
  margin-bottom: 16px;
}

.poe-label {
  font-family: 'Rubik', sans-serif;
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 8px;
}

.poe-label--predict {
  background: var(--info-light);
  color: var(--info);
}

.poe-label--observe {
  background: var(--accent-light);
  color: var(--accent-hover);
}

.poe-label--explain {
  background: var(--success-light);
  color: var(--success);
}

.poe-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0;
  justify-content: center;
}

.poe-option {
  background: var(--bg-surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.poe-option:hover:not(.poe-option--selected) {
  border-color: var(--accent-border);
}

.poe-option--selected {
  border-color: var(--accent);
  background: var(--accent-light);
}

.poe-observe,
.poe-explain {
  display: none;
  animation: fadeSlideUp 0.4s ease;
}

.poe-observe.visible,
.poe-explain.visible {
  display: block;
}

.poe-result {
  background: var(--bg-code);
  color: var(--text-on-code);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  margin: 12px 0;
}

.poe-btn {
  display: inline-block;
  background: var(--accent);
  color: var(--text-on-accent);
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-family: 'Rubik', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
  margin-top: 12px;
}

.poe-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.poe-btn:disabled {
  opacity: 0.5;
  cursor: default;
  transform: none;
}

/* ===== CODE STEPPER ===== */
.code-stepper {
  margin: 20px 0;
}

.code-stepper .code-block pre code {
  color: #CDD6F4;
}

.code-stepper .code-block pre code .step-line {
  display: block;
  height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0;
  transition: opacity 0.3s ease, height 0.3s ease, padding 0.3s ease;
}

/* Empty spacer lines between steps */
.code-stepper .code-block pre code .step-line--spacer {
  padding: 0;
  height: 0.4em;
  background: none !important;
  border-left: none !important;
  margin-left: 0 !important;
  padding-left: 0 !important;
}

.code-stepper .code-block pre code .step-line.active {
  height: auto;
  overflow: visible;
  opacity: 1;
  padding: 2px 0;
  background: rgba(255, 206, 50, 0.1);
  border-left: 3px solid var(--accent);
  padding-left: 10px;
  margin-left: -13px;
}

.code-stepper .code-block pre code .step-line.done {
  height: auto;
  overflow: visible;
  opacity: 1;
  padding: 2px 0;
}

.stepper-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.stepper-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  cursor: pointer;
  font-family: 'Rubik', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.stepper-btn:hover {
  border-color: var(--accent-border);
  background: var(--accent-light);
}

.stepper-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.stepper-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}